diff --git a/gradle.properties b/gradle.properties
index 021cc90f..4a04ab1d 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,12 +1,12 @@
 kotlin.code.style=official
 org.gradle.parallel=true
-kotlin_version=1.4.0
+kotlin_version=1.4.10
 kotlin_coroutines_version=1.3.9
-kotlin_serialisation_core_version=1.0.0-RC
+kotlin_serialisation_core_version=1.0.0-RC2
 
-ktor_version=1.4.0
+ktor_version=1.4.1
 
-klockVersion=1.12.0
+klockVersion=1.12.1
 uuidVersion=0.2.2
 
 exposed_version=0.27.1
diff --git a/ktor/common/build.gradle b/ktor/common/build.gradle
index 8c20af14..08e1c71f 100644
--- a/ktor/common/build.gradle
+++ b/ktor/common/build.gradle
@@ -40,7 +40,7 @@ kotlin {
         commonMain {
             dependencies {
                 implementation kotlin('stdlib')
-                api "org.jetbrains.kotlinx:kotlinx-serialization-core:$kotlin_serialisation_core_version"
+                api "org.jetbrains.kotlinx:kotlinx-serialization-json:$kotlin_serialisation_core_version"
                 api "org.jetbrains.kotlinx:kotlinx-serialization-cbor:$kotlin_serialisation_core_version"
 
                 api projectByName("utils.common")
diff --git a/utils/common/build.gradle b/utils/common/build.gradle
index 7037c8a4..12dcc409 100644
--- a/utils/common/build.gradle
+++ b/utils/common/build.gradle
@@ -41,7 +41,7 @@ kotlin {
             dependencies {
                 implementation kotlin('stdlib')
                 api "org.jetbrains.kotlinx:kotlinx-coroutines-core:$kotlin_coroutines_version"
-                api "org.jetbrains.kotlinx:kotlinx-serialization-core:$kotlin_serialisation_core_version"
+                api "org.jetbrains.kotlinx:kotlinx-serialization-json:$kotlin_serialisation_core_version"
 
                 api "com.soywiz.korlibs.klock:klock:$klockVersion"
                 api "com.benasher44:uuid:$uuidVersion"
diff --git a/utils/common/mimes_generator/mime_generator.py b/utils/common/mimes_generator/mime_generator.py
index 7e8ac558..ec9916a9 100644
--- a/utils/common/mimes_generator/mime_generator.py
+++ b/utils/common/mimes_generator/mime_generator.py
@@ -38,11 +38,11 @@ if __name__ == '__main__':
     code2 += '    KnownMimeTypes.Any,\n'
     for key, group in grouped:
         group_name = key.capitalize()
-        code += 'sealed class %s(raw: String) : MimeType, KnownMimeTypes(raw) {\n' % group_name
-        code += '    object Any: %s ("%s/*")\n' % (group_name, key)
+        code += '@Serializable(MimeTypeSerializer::class)\nsealed class %s(raw: String) : MimeType, KnownMimeTypes(raw) {\n' % group_name
+        code += '    @Serializable(MimeTypeSerializer::class)\n    object Any: %s ("%s/*")\n' % (group_name, key)
         for mime in group:
             name = fix_name(mime['mime_category'], mime['mime_name'])
-            code += '    object %s: %s ("%s/%s")\n' % (name, group_name, mime['mime_category'], mime['mime_name'])
+            code += '    @Serializable(MimeTypeSerializer::class)\n    object %s: %s ("%s/%s")\n' % (name, group_name, mime['mime_category'], mime['mime_name'])
             code2 += '    KnownMimeTypes.%s.%s,\n' % (group_name, name)
         code += '}\n\n'
     code2 += ')\n'