diff --git a/core/api/build.gradle b/core/api/build.gradle
index 539c431e..6174cd6e 100644
--- a/core/api/build.gradle
+++ b/core/api/build.gradle
@@ -31,12 +31,13 @@ repositories {
 
 kotlin {
     jvm()
-    js()
+    js { browser() }
 
     sourceSets {
         commonMain {
             dependencies {
                 implementation kotlin('stdlib')
+                api kotlin('reflect')
 
                 if ((project.hasProperty('RELEASE_MODE') && project.property('RELEASE_MODE') == "true") || System.getenv('RELEASE_MODE') == "true") {
                     api "com.insanusmokrassar:postssystem.utils.common:$core_version"
diff --git a/core/api/src/commonTest/kotlin/com/insanusmokrassar/postssystem/core/api/ContentSerialization.kt b/core/api/src/commonTest/kotlin/com/insanusmokrassar/postssystem/core/api/ContentSerialization.kt
index 96c98751..31617964 100644
--- a/core/api/src/commonTest/kotlin/com/insanusmokrassar/postssystem/core/api/ContentSerialization.kt
+++ b/core/api/src/commonTest/kotlin/com/insanusmokrassar/postssystem/core/api/ContentSerialization.kt
@@ -26,11 +26,11 @@ class ContentSerialization {
         }
 
         val stringified = registeredContentFakes.map {
-            Json.stringify(RegisteredContent.serializer(), it)
+            Json.encodeToString(RegisteredContent.serializer(), it)
         }
 
         val parsed = stringified.map {
-            Json.parse(RegisteredContent.serializer(), it)
+            Json.decodeFromString(RegisteredContent.serializer(), it)
         }
 
         parsed.forEachIndexed { i, registeredContent -> assertEquals(registeredContentFakes[i], registeredContent) }
diff --git a/core/ktor/client/build.gradle b/core/ktor/client/build.gradle
index 6f6a4456..a6c1507f 100644
--- a/core/ktor/client/build.gradle
+++ b/core/ktor/client/build.gradle
@@ -31,7 +31,7 @@ repositories {
 
 kotlin {
     jvm()
-    js()
+    js { browser() }
 
     sourceSets {
         commonMain {
diff --git a/core/ktor/client/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/ktor/client/content/ReadContentRepoKtorClient.kt b/core/ktor/client/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/ktor/client/content/ReadContentRepoKtorClient.kt
index 4ec4c212..ec0abcbe 100644
--- a/core/ktor/client/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/ktor/client/content/ReadContentRepoKtorClient.kt
+++ b/core/ktor/client/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/ktor/client/content/ReadContentRepoKtorClient.kt
@@ -19,7 +19,7 @@ class ReadContentRepoKtorClient(
     override suspend fun getContentsIds(): Set<ContentId> = client.get<ByteArray>(
         "$baseUrl/$getContentsIdsRoute"
     ).let {
-        standardKtorSerialFormat.load(contentIdsSerializer, it)
+        standardKtorSerialFormat.decodeFromByteArray(contentIdsSerializer, it)
     }
 
     override suspend fun getContentById(id: ContentId): RegisteredContent? = client.uniget(
diff --git a/core/ktor/client/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/ktor/client/content/WriteContentRepoKtorClient.kt b/core/ktor/client/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/ktor/client/content/WriteContentRepoKtorClient.kt
index a7b71515..b86bd1b8 100644
--- a/core/ktor/client/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/ktor/client/content/WriteContentRepoKtorClient.kt
+++ b/core/ktor/client/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/ktor/client/content/WriteContentRepoKtorClient.kt
@@ -17,13 +17,13 @@ class WriteContentRepoKtorClient(
     override val contentCreatedFlow: Flow<RegisteredContent> = client.createStandardWebsocketFlow(
         "$baseUrl/$contentCreatedFlowRoute"
     ) {
-        standardKtorSerialFormat.load(RegisteredContent.serializer(), it)
+        standardKtorSerialFormat.decodeFromByteArray(RegisteredContent.serializer(), it)
     }
 
     override val contentDeletedFlow: Flow<RegisteredContent> = client.createStandardWebsocketFlow(
         "$baseUrl/$contentDeletedFlowRoute"
     ) {
-        standardKtorSerialFormat.load(RegisteredContent.serializer(), it)
+        standardKtorSerialFormat.decodeFromByteArray(RegisteredContent.serializer(), it)
     }
 
     override suspend fun registerContent(content: Content): RegisteredContent? = client.unipost(
diff --git a/core/ktor/client/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/ktor/client/post/ReadPostsRepoKtorClient.kt b/core/ktor/client/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/ktor/client/post/ReadPostsRepoKtorClient.kt
index 768253f0..ba88f0a6 100644
--- a/core/ktor/client/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/ktor/client/post/ReadPostsRepoKtorClient.kt
+++ b/core/ktor/client/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/ktor/client/post/ReadPostsRepoKtorClient.kt
@@ -21,7 +21,7 @@ class ReadPostsRepoKtorClient(
     override suspend fun getPostsIds(): Set<PostId> = client.get<ByteArray>(
         "$baseUrl/$getPostsIdsRoute"
     ).let {
-        standardKtorSerialFormat.load(postIdsSerializer, it)
+        standardKtorSerialFormat.decodeFromByteArray(postIdsSerializer, it)
     }
 
     override suspend fun getPostById(id: PostId): RegisteredPost? = client.uniget(
diff --git a/core/ktor/client/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/ktor/client/post/WritePostsRepoKtorClient.kt b/core/ktor/client/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/ktor/client/post/WritePostsRepoKtorClient.kt
index 3a9aed1f..9ac42430 100644
--- a/core/ktor/client/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/ktor/client/post/WritePostsRepoKtorClient.kt
+++ b/core/ktor/client/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/ktor/client/post/WritePostsRepoKtorClient.kt
@@ -20,17 +20,17 @@ class WritePostsRepoKtorClient (
     override val postCreatedFlow: Flow<RegisteredPost> = client.createStandardWebsocketFlow(
         "$baseUrl/$postCreatedFlowRoute"
     ) {
-        standardKtorSerialFormat.load(RegisteredPost.serializer(), it)
+        standardKtorSerialFormat.decodeFromByteArray(RegisteredPost.serializer(), it)
     }
     override val postDeletedFlow: Flow<RegisteredPost> = client.createStandardWebsocketFlow(
         "$baseUrl/$postDeletedFlowRoute"
     ) {
-        standardKtorSerialFormat.load(RegisteredPost.serializer(), it)
+        standardKtorSerialFormat.decodeFromByteArray(RegisteredPost.serializer(), it)
     }
     override val postUpdatedFlow: Flow<RegisteredPost> = client.createStandardWebsocketFlow(
         "$baseUrl/$postUpdatedFlowRoute"
     ) {
-        standardKtorSerialFormat.load(RegisteredPost.serializer(), it)
+        standardKtorSerialFormat.decodeFromByteArray(RegisteredPost.serializer(), it)
     }
 
     override suspend fun createPost(post: Post): RegisteredPost? = client.unipost(
diff --git a/core/ktor/common/build.gradle b/core/ktor/common/build.gradle
index 5a8f7c1b..f96452bc 100644
--- a/core/ktor/common/build.gradle
+++ b/core/ktor/common/build.gradle
@@ -31,7 +31,7 @@ repositories {
 
 kotlin {
     jvm()
-    js()
+    js { browser() }
 
     sourceSets {
         commonMain {
diff --git a/core/ktor/server/src/main/kotlin/com/insanusmokrassar/postssystem/core/ktor/server/content/WriteContentRepoRoutingConfigurator.kt b/core/ktor/server/src/main/kotlin/com/insanusmokrassar/postssystem/core/ktor/server/content/WriteContentRepoRoutingConfigurator.kt
index 6d14145e..a40f3d4e 100644
--- a/core/ktor/server/src/main/kotlin/com/insanusmokrassar/postssystem/core/ktor/server/content/WriteContentRepoRoutingConfigurator.kt
+++ b/core/ktor/server/src/main/kotlin/com/insanusmokrassar/postssystem/core/ktor/server/content/WriteContentRepoRoutingConfigurator.kt
@@ -16,10 +16,10 @@ fun Route.configureWriteContentRepoRoutes(
     proxyTo: WriteContentRepo
 ) {
     includeWebsocketHandling(contentCreatedFlowRoute, proxyTo.contentCreatedFlow) {
-        standardKtorSerialFormat.dump(RegisteredContent.serializer(), it)
+        standardKtorSerialFormat.encodeToByteArray(RegisteredContent.serializer(), it)
     }
     includeWebsocketHandling(contentDeletedFlowRoute, proxyTo.contentDeletedFlow) {
-        standardKtorSerialFormat.dump(RegisteredContent.serializer(), it)
+        standardKtorSerialFormat.encodeToByteArray(RegisteredContent.serializer(), it)
     }
     post(registerContentRoute) {
         val content = call.uniload(Content.serializer())
diff --git a/core/ktor/server/src/main/kotlin/com/insanusmokrassar/postssystem/core/ktor/server/post/WritePostsRepoRoutingConfigurator.kt b/core/ktor/server/src/main/kotlin/com/insanusmokrassar/postssystem/core/ktor/server/post/WritePostsRepoRoutingConfigurator.kt
index 68eb1f6a..6a82e2c3 100644
--- a/core/ktor/server/src/main/kotlin/com/insanusmokrassar/postssystem/core/ktor/server/post/WritePostsRepoRoutingConfigurator.kt
+++ b/core/ktor/server/src/main/kotlin/com/insanusmokrassar/postssystem/core/ktor/server/post/WritePostsRepoRoutingConfigurator.kt
@@ -16,13 +16,13 @@ fun Route.configureWritePostsRepoRoutes(
     proxyTo: WritePostsRepo
 ) {
     includeWebsocketHandling(postCreatedFlowRoute, proxyTo.postCreatedFlow) {
-        standardKtorSerialFormat.dump(RegisteredPost.serializer(), it)
+        standardKtorSerialFormat.encodeToByteArray(RegisteredPost.serializer(), it)
     }
     includeWebsocketHandling(postDeletedFlowRoute, proxyTo.postDeletedFlow) {
-        standardKtorSerialFormat.dump(RegisteredPost.serializer(), it)
+        standardKtorSerialFormat.encodeToByteArray(RegisteredPost.serializer(), it)
     }
     includeWebsocketHandling(postUpdatedFlowRoute, proxyTo.postUpdatedFlow) {
-        standardKtorSerialFormat.dump(RegisteredPost.serializer(), it)
+        standardKtorSerialFormat.encodeToByteArray(RegisteredPost.serializer(), it)
     }
 
     post(createPostRoute) {
diff --git a/gradle.properties b/gradle.properties
index a247c68e..6364fc3c 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,19 +1,19 @@
 kotlin.code.style=official
 org.gradle.parallel=true
-kotlin_version=1.3.72
-kotlin_coroutines_version=1.3.8
-kotlin_serialisation_runtime_version=0.20.0
+kotlin_version=1.4.0
+kotlin_coroutines_version=1.3.9
+kotlin_serialisation_core_version=1.0.0-RC
 
-ktor_version=1.3.2
+ktor_version=1.3.2-1.4.0-rc
 
-klockVersion=1.11.14
-uuidVersion=0.1.1
+klockVersion=1.12.0
+uuidVersion=0.2.0
 
 exposed_version=0.26.2
 test_sqlite_version=3.32.3.2
 
 javax_activation_version=1.1.1
 
-gradle_bintray_plugin_version=1.8.4
+gradle_bintray_plugin_version=1.8.5
 
-core_version=0.4.2
+core_version=0.5.0
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 492d706a..727d0a77 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,4 +1,4 @@
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.5.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.6-bin.zip
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStorePath=wrapper/dists
diff --git a/ktor/client/build.gradle b/ktor/client/build.gradle
index d129348b..d6605eb4 100644
--- a/ktor/client/build.gradle
+++ b/ktor/client/build.gradle
@@ -31,7 +31,7 @@ repositories {
 
 kotlin {
     jvm()
-    js()
+    js { browser() }
 
     sourceSets {
         commonMain {
diff --git a/ktor/client/src/commonMain/kotlin/com/insanusmokrassar/postssystem/ktor/client/StandardHttpClientGetPost.kt b/ktor/client/src/commonMain/kotlin/com/insanusmokrassar/postssystem/ktor/client/StandardHttpClientGetPost.kt
index 06b042fe..77e38e75 100644
--- a/ktor/client/src/commonMain/kotlin/com/insanusmokrassar/postssystem/ktor/client/StandardHttpClientGetPost.kt
+++ b/ktor/client/src/commonMain/kotlin/com/insanusmokrassar/postssystem/ktor/client/StandardHttpClientGetPost.kt
@@ -15,7 +15,7 @@ suspend fun <ResultType> HttpClient.uniget(
 ) = get<ByteArray>(
     url
 ).let {
-    standardKtorSerialFormat.load(resultDeserializer, it)
+    standardKtorSerialFormat.decodeFromByteArray(resultDeserializer, it)
 }
 
 suspend fun <BodyType, ResultType> HttpClient.unipost(
@@ -23,7 +23,7 @@ suspend fun <BodyType, ResultType> HttpClient.unipost(
     bodyInfo: BodyPair<BodyType>,
     resultDeserializer: DeserializationStrategy<ResultType>
 ) = post<ByteArray>(url) {
-    body = standardKtorSerialFormat.dump(bodyInfo.first, bodyInfo.second)
+    body = standardKtorSerialFormat.encodeToByteArray(bodyInfo.first, bodyInfo.second)
 }.let {
-    standardKtorSerialFormat.load(resultDeserializer, it)
+    standardKtorSerialFormat.decodeFromByteArray(resultDeserializer, it)
 }
diff --git a/ktor/common/build.gradle b/ktor/common/build.gradle
index e4f37a32..768e3839 100644
--- a/ktor/common/build.gradle
+++ b/ktor/common/build.gradle
@@ -31,14 +31,14 @@ repositories {
 
 kotlin {
     jvm()
-    js()
+    js { browser() }
 
     sourceSets {
         commonMain {
             dependencies {
                 implementation kotlin('stdlib')
-                api "org.jetbrains.kotlinx:kotlinx-serialization-runtime-common:$kotlin_serialisation_runtime_version"
-                api "org.jetbrains.kotlinx:kotlinx-serialization-cbor-common:$kotlin_serialisation_runtime_version"
+                api "org.jetbrains.kotlinx:kotlinx-serialization-core:$kotlin_serialisation_core_version"
+                api "org.jetbrains.kotlinx:kotlinx-serialization-cbor:$kotlin_serialisation_core_version"
 
                 api projectByName("postssystem.utils.common")
             }
@@ -52,8 +52,7 @@ kotlin {
         jvmMain {
             dependencies {
                 implementation kotlin('stdlib-jdk8')
-                api "org.jetbrains.kotlinx:kotlinx-serialization-runtime:$kotlin_serialisation_runtime_version"
-                api "org.jetbrains.kotlinx:kotlinx-serialization-cbor:$kotlin_serialisation_runtime_version"
+//                api "org.jetbrains.kotlinx:kotlinx-serialization-cbor:$kotlin_serialisation_core_version"
             }
         }
         jvmTest {
@@ -64,8 +63,7 @@ kotlin {
         jsMain {
             dependencies {
                 implementation kotlin('stdlib-js')
-                api "org.jetbrains.kotlinx:kotlinx-serialization-runtime-js:$kotlin_serialisation_runtime_version"
-                api "org.jetbrains.kotlinx:kotlinx-serialization-cbor-js:$kotlin_serialisation_runtime_version"
+//                api "org.jetbrains.kotlinx:kotlinx-serialization-cbor-js:$kotlin_serialisation_core_version"
             }
         }
         jsTest {
diff --git a/ktor/server/build.gradle b/ktor/server/build.gradle
index 21dd6bd4..4321b01d 100644
--- a/ktor/server/build.gradle
+++ b/ktor/server/build.gradle
@@ -36,7 +36,7 @@ kotlin {
         commonMain {
             dependencies {
                 implementation kotlin('stdlib')
-                api "org.jetbrains.kotlinx:kotlinx-coroutines-core-common:$kotlin_coroutines_version"
+                api "org.jetbrains.kotlinx:kotlinx-coroutines-core:$kotlin_coroutines_version"
 
                 api projectByName("postssystem.ktor.common")
             }
@@ -50,9 +50,6 @@ kotlin {
 
         jvmMain {
             dependencies {
-                api "org.jetbrains.kotlinx:kotlinx-serialization-runtime:$kotlin_serialisation_runtime_version"
-                api "org.jetbrains.kotlinx:kotlinx-serialization-properties:$kotlin_serialisation_runtime_version"
-
                 api "io.ktor:ktor-server:$ktor_version"
                 api "io.ktor:ktor-server-host-common:$ktor_version"
                 api "io.ktor:ktor-server-netty:$ktor_version"
diff --git a/ktor/server/src/jvmMain/kotlin/com/insanusmokrassar/postssystem/ktor/server/ServerRoutingShortcuts.kt b/ktor/server/src/jvmMain/kotlin/com/insanusmokrassar/postssystem/ktor/server/ServerRoutingShortcuts.kt
index 906e3321..5948ac49 100644
--- a/ktor/server/src/jvmMain/kotlin/com/insanusmokrassar/postssystem/ktor/server/ServerRoutingShortcuts.kt
+++ b/ktor/server/src/jvmMain/kotlin/com/insanusmokrassar/postssystem/ktor/server/ServerRoutingShortcuts.kt
@@ -14,14 +14,14 @@ suspend fun <T> ApplicationCall.unianswer(
     answer: T
 ) {
     respondBytes(
-        standardKtorSerialFormat.dump(answerSerializer, answer),
+        standardKtorSerialFormat.encodeToByteArray(answerSerializer, answer),
         standardKtorSerialFormatContentType
     )
 }
 
 suspend fun <T> ApplicationCall.uniload(
     deserializer: DeserializationStrategy<T>
-) = standardKtorSerialFormat.load(
+) = standardKtorSerialFormat.decodeFromByteArray(
     deserializer,
     request.receiveChannel().toByteArray()
 )
diff --git a/ktor/server/src/jvmMain/kotlin/com/insanusmokrassar/postssystem/ktor/server/configurators/ApplicationCachingHeadersConfigurator.kt b/ktor/server/src/jvmMain/kotlin/com/insanusmokrassar/postssystem/ktor/server/configurators/ApplicationCachingHeadersConfigurator.kt
index e45a0789..f62c8bcb 100644
--- a/ktor/server/src/jvmMain/kotlin/com/insanusmokrassar/postssystem/ktor/server/configurators/ApplicationCachingHeadersConfigurator.kt
+++ b/ktor/server/src/jvmMain/kotlin/com/insanusmokrassar/postssystem/ktor/server/configurators/ApplicationCachingHeadersConfigurator.kt
@@ -3,10 +3,10 @@ package com.insanusmokrassar.postssystem.ktor.server.configurators
 import io.ktor.application.Application
 import io.ktor.application.install
 import io.ktor.features.CachingHeaders
-import kotlinx.serialization.ContextualSerialization
+import kotlinx.serialization.Contextual
 
 data class ApplicationCachingHeadersConfigurator(
-    private val elements: List<@ContextualSerialization Element>
+    private val elements: List<@Contextual Element>
 ) : KtorApplicationConfigurator{
     interface Element { operator fun CachingHeaders.Configuration.invoke() }
 
diff --git a/ktor/server/src/jvmMain/kotlin/com/insanusmokrassar/postssystem/ktor/server/configurators/ApplicationRoutingConfigurator.kt b/ktor/server/src/jvmMain/kotlin/com/insanusmokrassar/postssystem/ktor/server/configurators/ApplicationRoutingConfigurator.kt
index 8ec15a65..48e62e28 100644
--- a/ktor/server/src/jvmMain/kotlin/com/insanusmokrassar/postssystem/ktor/server/configurators/ApplicationRoutingConfigurator.kt
+++ b/ktor/server/src/jvmMain/kotlin/com/insanusmokrassar/postssystem/ktor/server/configurators/ApplicationRoutingConfigurator.kt
@@ -3,12 +3,12 @@ package com.insanusmokrassar.postssystem.ktor.server.configurators
 import io.ktor.application.*
 import io.ktor.routing.Route
 import io.ktor.routing.Routing
-import kotlinx.serialization.ContextualSerialization
+import kotlinx.serialization.Contextual
 import kotlinx.serialization.Serializable
 
 @Serializable
 class ApplicationRoutingConfigurator(
-    private val elements: List<@ContextualSerialization Element>
+    private val elements: List<@Contextual Element>
 ) : KtorApplicationConfigurator {
     interface Element { operator fun Route.invoke() }
 
diff --git a/ktor/server/src/jvmMain/kotlin/com/insanusmokrassar/postssystem/ktor/server/configurators/ApplicationSessionsConfigurator.kt b/ktor/server/src/jvmMain/kotlin/com/insanusmokrassar/postssystem/ktor/server/configurators/ApplicationSessionsConfigurator.kt
index 9245f738..c2012a59 100644
--- a/ktor/server/src/jvmMain/kotlin/com/insanusmokrassar/postssystem/ktor/server/configurators/ApplicationSessionsConfigurator.kt
+++ b/ktor/server/src/jvmMain/kotlin/com/insanusmokrassar/postssystem/ktor/server/configurators/ApplicationSessionsConfigurator.kt
@@ -3,10 +3,10 @@ package com.insanusmokrassar.postssystem.ktor.server.configurators
 import io.ktor.application.Application
 import io.ktor.application.install
 import io.ktor.sessions.Sessions
-import kotlinx.serialization.ContextualSerialization
+import kotlinx.serialization.Contextual
 
 class ApplicationSessionsConfigurator(
-    private val elements: List<@ContextualSerialization Element>
+    private val elements: List<@Contextual Element>
 ) : KtorApplicationConfigurator {
     interface Element { operator fun Sessions.Configuration.invoke() }
 
diff --git a/ktor/server/src/jvmMain/kotlin/com/insanusmokrassar/postssystem/ktor/server/configurators/StatusPagesConfigurator.kt b/ktor/server/src/jvmMain/kotlin/com/insanusmokrassar/postssystem/ktor/server/configurators/StatusPagesConfigurator.kt
index aa2c5289..ebb5bc5c 100644
--- a/ktor/server/src/jvmMain/kotlin/com/insanusmokrassar/postssystem/ktor/server/configurators/StatusPagesConfigurator.kt
+++ b/ktor/server/src/jvmMain/kotlin/com/insanusmokrassar/postssystem/ktor/server/configurators/StatusPagesConfigurator.kt
@@ -3,10 +3,10 @@ package com.insanusmokrassar.postssystem.ktor.server.configurators
 import io.ktor.application.Application
 import io.ktor.application.install
 import io.ktor.features.StatusPages
-import kotlinx.serialization.ContextualSerialization
+import kotlinx.serialization.*
 
 class StatusPagesConfigurator(
-    private val elements: List<@ContextualSerialization Element>
+    private val elements: List<@Contextual Element>
 ) : KtorApplicationConfigurator {
     interface Element { operator fun StatusPages.Configuration.invoke() }
 
diff --git a/ktor/tests/src/test/kotlin/com/insanusmokrassar/postssystem/ktor/tests/WebsocketsTest.kt b/ktor/tests/src/test/kotlin/com/insanusmokrassar/postssystem/ktor/tests/WebsocketsTest.kt
index c94c495f..c7278418 100644
--- a/ktor/tests/src/test/kotlin/com/insanusmokrassar/postssystem/ktor/tests/WebsocketsTest.kt
+++ b/ktor/tests/src/test/kotlin/com/insanusmokrassar/postssystem/ktor/tests/WebsocketsTest.kt
@@ -28,7 +28,7 @@ class WebsocketsTest {
             install(WebSockets)
             routing {
                 includeWebsocketHandling(suburl, dataFlow) {
-                    standardKtorSerialFormat.dump(Int.serializer(), it)
+                    standardKtorSerialFormat.encodeToByteArray(Int.serializer(), it)
                 }
             }
         }.also {
@@ -44,7 +44,7 @@ class WebsocketsTest {
             "$serverUrl/$suburl",
             { false } // always skip reconnection
         ) {
-            standardKtorSerialFormat.load(Int.serializer(), it)
+            standardKtorSerialFormat.decodeFromByteArray(Int.serializer(), it)
         }
 
         var currentlyCheckingData: Int? = null
diff --git a/markups/commons/build.gradle b/markups/commons/build.gradle
index 106eb991..b96dc010 100644
--- a/markups/commons/build.gradle
+++ b/markups/commons/build.gradle
@@ -31,14 +31,14 @@ repositories {
 
 kotlin {
     jvm()
-    js()
+    js { browser() }
 
     sourceSets {
         commonMain {
             dependencies {
                 implementation kotlin('stdlib')
-                api "org.jetbrains.kotlinx:kotlinx-coroutines-core-common:$kotlin_coroutines_version"
-                api "org.jetbrains.kotlinx:kotlinx-serialization-runtime-common:$kotlin_serialisation_runtime_version"
+                api "org.jetbrains.kotlinx:kotlinx-coroutines-core:$kotlin_coroutines_version"
+                api "org.jetbrains.kotlinx:kotlinx-serialization-core:$kotlin_serialisation_core_version"
 
                 if ((project.hasProperty('RELEASE_MODE') && project.property('RELEASE_MODE') == "true") || System.getenv('RELEASE_MODE') == "true") {
                     api "com.insanusmokrassar:postssystem.core.api:$core_version"
@@ -59,8 +59,6 @@ kotlin {
         jvmMain {
             dependencies {
                 implementation kotlin('stdlib-jdk8')
-                api "org.jetbrains.kotlinx:kotlinx-coroutines-core:$kotlin_coroutines_version"
-                api "org.jetbrains.kotlinx:kotlinx-serialization-runtime:$kotlin_serialisation_runtime_version"
             }
         }
         jvmTest {
@@ -71,8 +69,6 @@ kotlin {
         jsMain {
             dependencies {
                 implementation kotlin('stdlib-js')
-                api "org.jetbrains.kotlinx:kotlinx-coroutines-core-js:$kotlin_coroutines_version"
-                api "org.jetbrains.kotlinx:kotlinx-serialization-runtime-js:$kotlin_serialisation_runtime_version"
             }
         }
         jsTest {
diff --git a/markups/html/build.gradle b/markups/html/build.gradle
index 74947d60..08d47f54 100644
--- a/markups/html/build.gradle
+++ b/markups/html/build.gradle
@@ -31,14 +31,14 @@ repositories {
 
 kotlin {
     jvm()
-    js()
+    js { browser() }
 
     sourceSets {
         commonMain {
             dependencies {
                 implementation kotlin('stdlib')
-                api "org.jetbrains.kotlinx:kotlinx-coroutines-core-common:$kotlin_coroutines_version"
-                api "org.jetbrains.kotlinx:kotlinx-serialization-runtime-common:$kotlin_serialisation_runtime_version"
+                api "org.jetbrains.kotlinx:kotlinx-coroutines-core:$kotlin_coroutines_version"
+                api "org.jetbrains.kotlinx:kotlinx-serialization-core:$kotlin_serialisation_core_version"
 
                 if ((project.hasProperty('RELEASE_MODE') && project.property('RELEASE_MODE') == "true") || System.getenv('RELEASE_MODE') == "true") {
                     api "com.insanusmokrassar:postssystem.markups.core:$core_version"
@@ -56,9 +56,6 @@ kotlin {
         jvmMain {
             dependencies {
                 implementation kotlin('stdlib-jdk8')
-                api "org.jetbrains.kotlinx:kotlinx-coroutines-core:$kotlin_coroutines_version"
-                api "org.jetbrains.kotlinx:kotlinx-serialization-runtime:$kotlin_serialisation_runtime_version"
-
                 api "org.jetbrains.kotlinx:kotlinx-html-jvm:$kotlinx_html_version"
             }
         }
@@ -70,9 +67,6 @@ kotlin {
         jsMain {
             dependencies {
                 implementation kotlin('stdlib-js')
-                api "org.jetbrains.kotlinx:kotlinx-coroutines-core-js:$kotlin_coroutines_version"
-                api "org.jetbrains.kotlinx:kotlinx-serialization-runtime-js:$kotlin_serialisation_runtime_version"
-
                 api "org.jetbrains.kotlinx:kotlinx-html-js:$kotlinx_html_version"
             }
         }
diff --git a/publishing/api/build.gradle b/publishing/api/build.gradle
index 5590f780..feb7352b 100644
--- a/publishing/api/build.gradle
+++ b/publishing/api/build.gradle
@@ -31,7 +31,7 @@ repositories {
 
 kotlin {
     jvm()
-    js()
+    js { browser() }
 
     sourceSets {
         commonMain {
diff --git a/publishing/ktor/client/build.gradle b/publishing/ktor/client/build.gradle
index 4fef490f..94f454a6 100644
--- a/publishing/ktor/client/build.gradle
+++ b/publishing/ktor/client/build.gradle
@@ -31,7 +31,7 @@ repositories {
 
 kotlin {
     jvm()
-    js()
+    js { browser() }
 
     sourceSets {
         commonMain {
diff --git a/publishing/ktor/common/build.gradle b/publishing/ktor/common/build.gradle
index cbd356ff..a7e7969b 100644
--- a/publishing/ktor/common/build.gradle
+++ b/publishing/ktor/common/build.gradle
@@ -29,7 +29,7 @@ repositories {
 
 kotlin {
     jvm()
-    js()
+    js { browser() }
 
     sourceSets {
         commonMain {
diff --git a/utils/common/build.gradle b/utils/common/build.gradle
index 153dcd0b..6e6718b6 100644
--- a/utils/common/build.gradle
+++ b/utils/common/build.gradle
@@ -31,14 +31,14 @@ repositories {
 
 kotlin {
     jvm()
-    js()
+    js { browser() }
 
     sourceSets {
         commonMain {
             dependencies {
                 implementation kotlin('stdlib')
-                api "org.jetbrains.kotlinx:kotlinx-coroutines-core-common:$kotlin_coroutines_version"
-                api "org.jetbrains.kotlinx:kotlinx-serialization-runtime-common:$kotlin_serialisation_runtime_version"
+                api "org.jetbrains.kotlinx:kotlinx-coroutines-core:$kotlin_coroutines_version"
+                api "org.jetbrains.kotlinx:kotlinx-serialization-core:$kotlin_serialisation_core_version"
 
                 api "com.soywiz.korlibs.klock:klock:$klockVersion"
                 api "com.benasher44:uuid:$uuidVersion"
@@ -53,10 +53,6 @@ kotlin {
         jvmMain {
             dependencies {
                 implementation kotlin('stdlib-jdk8')
-                api "org.jetbrains.kotlinx:kotlinx-coroutines-core:$kotlin_coroutines_version"
-                api "org.jetbrains.kotlinx:kotlinx-serialization-runtime:$kotlin_serialisation_runtime_version"
-
-                api "javax.activation:activation:$javax_activation_version"
             }
         }
         jvmTest {
@@ -67,8 +63,6 @@ kotlin {
         jsMain {
             dependencies {
                 implementation kotlin('stdlib-js')
-                api "org.jetbrains.kotlinx:kotlinx-coroutines-core-js:$kotlin_coroutines_version"
-                api "org.jetbrains.kotlinx:kotlinx-serialization-runtime-js:$kotlin_serialisation_runtime_version"
             }
         }
         jsTest {
diff --git a/utils/common/src/commonMain/kotlin/com/insanusmokrassar/postssystem/utils/common/ByteArrayAllocator.kt b/utils/common/src/commonMain/kotlin/com/insanusmokrassar/postssystem/utils/common/ByteArrayAllocator.kt
index 4ce5f986..bd9c11c1 100644
--- a/utils/common/src/commonMain/kotlin/com/insanusmokrassar/postssystem/utils/common/ByteArrayAllocator.kt
+++ b/utils/common/src/commonMain/kotlin/com/insanusmokrassar/postssystem/utils/common/ByteArrayAllocator.kt
@@ -2,6 +2,9 @@ package com.insanusmokrassar.postssystem.utils.common
 
 import kotlinx.serialization.*
 import kotlinx.serialization.builtins.ByteArraySerializer
+import kotlinx.serialization.descriptors.SerialDescriptor
+import kotlinx.serialization.encoding.Decoder
+import kotlinx.serialization.encoding.Encoder
 
 typealias ByteArrayAllocator = () -> ByteArray
 
@@ -10,7 +13,7 @@ object ByteArrayAllocatorSerializer : KSerializer<ByteArrayAllocator> {
     override val descriptor: SerialDescriptor = realSerializer.descriptor
 
     override fun deserialize(decoder: Decoder): ByteArrayAllocator {
-        val bytes = decoder.decode(realSerializer)
+        val bytes = realSerializer.deserialize(decoder)
         return { bytes }
     }
 
diff --git a/utils/common/src/commonMain/kotlin/com/insanusmokrassar/postssystem/utils/common/MimeTypeTools.kt b/utils/common/src/commonMain/kotlin/com/insanusmokrassar/postssystem/utils/common/MimeTypeTools.kt
index 278c4e86..125c7d0b 100644
--- a/utils/common/src/commonMain/kotlin/com/insanusmokrassar/postssystem/utils/common/MimeTypeTools.kt
+++ b/utils/common/src/commonMain/kotlin/com/insanusmokrassar/postssystem/utils/common/MimeTypeTools.kt
@@ -1,6 +1,9 @@
 package com.insanusmokrassar.postssystem.utils.common
 
 import kotlinx.serialization.*
+import kotlinx.serialization.descriptors.*
+import kotlinx.serialization.encoding.Decoder
+import kotlinx.serialization.encoding.Encoder
 
 private val mimesCache = mutableMapOf<String, MimeType>().also {
     knownMimeTypes.forEach { mimeType -> it[mimeType.raw] = mimeType }
@@ -14,7 +17,7 @@ internal fun parseMimeType(raw: String): MimeType = findBuiltinMimeType(raw) ?:
 
 @Serializer(MimeType::class)
 internal object MimeTypeSerializer : KSerializer<MimeType> {
-    override val descriptor: SerialDescriptor = PrimitiveDescriptor("mimeType", PrimitiveKind.STRING)
+    override val descriptor: SerialDescriptor = PrimitiveSerialDescriptor("mimeType", PrimitiveKind.STRING)
 
     override fun deserialize(decoder: Decoder): MimeType {
         val mimeType = decoder.decodeString()
diff --git a/utils/common/src/jsMain/kotlin/com/insanusmokrassar/postssystem/utils/common/MimeTypeTools.kt b/utils/common/src/jsMain/kotlin/com/insanusmokrassar/postssystem/utils/common/MimeTypeTools.kt
deleted file mode 100644
index c31a426d..00000000
--- a/utils/common/src/jsMain/kotlin/com/insanusmokrassar/postssystem/utils/common/MimeTypeTools.kt
+++ /dev/null
@@ -1,7 +0,0 @@
-package com.insanusmokrassar.postssystem.utils.common
-
-import org.w3c.dom.get
-import kotlin.browser.window
-
-val MimeType.jsMimeType
-    get() = window.navigator.mimeTypes[raw]
diff --git a/utils/common/src/jvmMain/kotlin/com/insanusmokrassar/postssystem/utils/common/MimeTypeTools.kt b/utils/common/src/jvmMain/kotlin/com/insanusmokrassar/postssystem/utils/common/MimeTypeTools.kt
deleted file mode 100644
index b7638cbb..00000000
--- a/utils/common/src/jvmMain/kotlin/com/insanusmokrassar/postssystem/utils/common/MimeTypeTools.kt
+++ /dev/null
@@ -1,5 +0,0 @@
-package com.insanusmokrassar.postssystem.utils.common
-
-val MimeType.asActivationMimeType: javax.activation.MimeType
-    get() = javax.activation.MimeType(raw)
-
diff --git a/utils/repos/common/build.gradle b/utils/repos/common/build.gradle
index e5c52d1d..16f73bd2 100644
--- a/utils/repos/common/build.gradle
+++ b/utils/repos/common/build.gradle
@@ -31,7 +31,7 @@ repositories {
 
 kotlin {
     jvm()
-    js()
+    js { browser() }
 
     sourceSets {
         commonMain {