diff --git a/CHANGELOG.md b/CHANGELOG.md
index b85851f815..4d975cd783 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,11 @@
 
 ## 29.0.0
 
+## 28.0.3
+
+* `Core`:
+  * Add passing of default engines in `HttpClient` constructors
+
 ## 28.0.2
 
 * `Core`:
diff --git a/build.gradle b/build.gradle
index 528c036dbe..f78808dee8 100644
--- a/build.gradle
+++ b/build.gradle
@@ -28,7 +28,7 @@ if ((project.hasProperty('SONATYPE_USER') || System.getenv('SONATYPE_USER') != n
             username = project.hasProperty('SONATYPE_USER') ? project.property('SONATYPE_USER') : System.getenv('SONATYPE_USER')
             password = project.hasProperty('SONATYPE_PASSWORD') ? project.property('SONATYPE_PASSWORD') : System.getenv('SONATYPE_PASSWORD')
             validationTimeout = Duration.ofSeconds(0)
-            publishingType = "USER_MANAGED"
+            publishingType = System.getenv('PUBLISHING_TYPE') != "" ? System.getenv('PUBLISHING_TYPE') : "USER_MANAGED"
         }
 
         publishAllProjectsProbablyBreakingProjectIsolation()
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 33963a401e..927d64b412 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -37,6 +37,8 @@ kotlin-test-js = { module = "org.jetbrains.kotlin:kotlin-test-js", version.ref =
 
 ktor-client-core = { module = "io.ktor:ktor-client-core", version.ref = "ktor" }
 ktor-client-cio = { module = "io.ktor:ktor-client-cio", version.ref = "ktor" }
+ktor-client-java = { module = "io.ktor:ktor-client-java", version.ref = "ktor" }
+ktor-client-js = { module = "io.ktor:ktor-client-js", version.ref = "ktor" }
 ktor-client-curl = { module = "io.ktor:ktor-client-curl", version.ref = "ktor" }
 ktor-client-winhttp = { module = "io.ktor:ktor-client-winhttp", version.ref = "ktor" }
 ktor-server = { module = "io.ktor:ktor-server", version.ref = "ktor" }
diff --git a/tgbotapi.api/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/api/BotExtensions.kt b/tgbotapi.api/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/api/BotExtensions.kt
index c05a7aa8c3..613ffdd372 100644
--- a/tgbotapi.api/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/api/BotExtensions.kt
+++ b/tgbotapi.api/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/api/BotExtensions.kt
@@ -3,6 +3,7 @@ package dev.inmo.tgbotapi.extensions.api
 import dev.inmo.tgbotapi.bot.ktor.telegramBot
 import dev.inmo.tgbotapi.bot.TelegramBot
 import dev.inmo.tgbotapi.utils.TelegramAPIUrlsKeeper
+import dev.inmo.tgbotapi.utils.defaultKtorEngine
 import dev.inmo.tgbotapi.utils.telegramBotAPIDefaultUrl
 import io.ktor.client.HttpClient
 import io.ktor.client.HttpClientConfig
@@ -13,7 +14,7 @@ import io.ktor.client.engine.*
  */
 public fun telegramBot(
     urlsKeeper: TelegramAPIUrlsKeeper,
-    client: HttpClient = HttpClient()
+    client: HttpClient = HttpClient(defaultKtorEngine)
 ): TelegramBot = telegramBot(urlsKeeper) {
     this.client = client
 }
@@ -68,7 +69,7 @@ public fun telegramBot(
     apiUrl: String = telegramBotAPIDefaultUrl,
     testServer: Boolean = false,
     fileLinkUrlMapper: TelegramAPIUrlsKeeper.(String) -> String = { "${fileBaseUrl}/$it" },
-    client: HttpClient = HttpClient()
+    client: HttpClient = HttpClient(defaultKtorEngine)
 ): TelegramBot = telegramBot(TelegramAPIUrlsKeeper(token, testServer, apiUrl, fileLinkUrlMapper), client)
 
 @Suppress("NOTHING_TO_INLINE")
diff --git a/tgbotapi.core/api/tgbotapi.core.api b/tgbotapi.core/api/tgbotapi.core.api
index 2e8d592d53..f32836f6c1 100644
--- a/tgbotapi.core/api/tgbotapi.core.api
+++ b/tgbotapi.core/api/tgbotapi.core.api
@@ -31910,6 +31910,10 @@ public final class dev/inmo/tgbotapi/utils/DefaultKSLogKt {
 	public static final fun setDefaultKTgBotAPIKSLogSystemTag (Ljava/lang/String;)V
 }
 
+public final class dev/inmo/tgbotapi/utils/DefaultKtorEngine_jvmKt {
+	public static final fun getDefaultKtorEngine ()Lio/ktor/client/engine/HttpClientEngineFactory;
+}
+
 public final class dev/inmo/tgbotapi/utils/DeserializeWithUnknownKt {
 	public static final fun deserializeEitherWithRaw (Lkotlinx/serialization/encoding/Decoder;Lkotlinx/serialization/KSerializer;)Ldev/inmo/micro_utils/common/Either;
 	public static final fun deserializeWithRaw (Lkotlinx/serialization/encoding/Decoder;Lkotlinx/serialization/KSerializer;)Lkotlin/Pair;
diff --git a/tgbotapi.core/build.gradle b/tgbotapi.core/build.gradle
index 913de5000c..73ef44ea01 100644
--- a/tgbotapi.core/build.gradle
+++ b/tgbotapi.core/build.gradle
@@ -47,12 +47,19 @@ kotlin {
                 api libs.ktor.server.host.common
 
                 api libs.ktor.client.cio
+                api libs.ktor.client.java
 
                 api libs.javax.activation
             }
         }
 
-        linuxX64Main {
+        jsMain {
+            dependencies {
+                api libs.ktor.client.js
+            }
+        }
+
+        linuxMain {
             dependencies {
                 api libs.ktor.client.curl
             }
@@ -64,7 +71,7 @@ kotlin {
             }
         }
 
-        mingwX64Main {
+        mingwMain {
             dependencies {
                 api libs.ktor.client.winhttp
             }
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/bot/ktor/KtorRequestsExecutor.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/bot/ktor/KtorRequestsExecutor.kt
index fb4d680c97..4f3a5dae1a 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/bot/ktor/KtorRequestsExecutor.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/bot/ktor/KtorRequestsExecutor.kt
@@ -8,6 +8,7 @@ import dev.inmo.tgbotapi.bot.settings.limiters.RequestLimiter
 import dev.inmo.tgbotapi.requests.abstracts.Request
 import dev.inmo.tgbotapi.utils.DefaultKTgBotAPIKSLog
 import dev.inmo.tgbotapi.utils.TelegramAPIUrlsKeeper
+import dev.inmo.tgbotapi.utils.defaultKtorEngine
 import dev.inmo.tgbotapi.utils.nonstrictJsonFormat
 import io.ktor.client.*
 import kotlinx.serialization.json.Json
@@ -37,7 +38,7 @@ expect class KtorRequestsExecutor internal constructor(
 
 fun KtorRequestsExecutor(
     telegramAPIUrlsKeeper: TelegramAPIUrlsKeeper,
-    client: HttpClient = HttpClient(),
+    client: HttpClient = HttpClient(defaultKtorEngine),
     callsFactories: List<KtorCallFactory> = emptyList(),
     excludeDefaultFactories: Boolean = false,
     requestsLimiter: RequestLimiter = ExceptionsOnlyLimiter,
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/bot/ktor/KtorRequestsExecutorFactories.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/bot/ktor/KtorRequestsExecutorFactories.kt
index fe63166cc5..bacd033a92 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/bot/ktor/KtorRequestsExecutorFactories.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/bot/ktor/KtorRequestsExecutorFactories.kt
@@ -21,7 +21,7 @@ fun createTelegramBotDefaultKtorCallRequestsFactories(logger: KSLog? = null) = l
 class KtorRequestsExecutorBuilder(
     var telegramAPIUrlsKeeper: TelegramAPIUrlsKeeper
 ) {
-    var client: HttpClient = HttpClient()
+    var client: HttpClient = HttpClient(defaultKtorEngine)
     var callsFactories: List<KtorCallFactory> = emptyList()
     var excludeDefaultFactories: Boolean = false
     var requestsLimiter: RequestLimiter = ExceptionsOnlyLimiter
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/utils/DefaultKtorEngine.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/utils/DefaultKtorEngine.kt
new file mode 100644
index 0000000000..711de69a23
--- /dev/null
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/utils/DefaultKtorEngine.kt
@@ -0,0 +1,5 @@
+package dev.inmo.tgbotapi.utils
+
+import io.ktor.client.engine.HttpClientEngineFactory
+
+expect val defaultKtorEngine: HttpClientEngineFactory<*>
diff --git a/tgbotapi.core/src/jsMain/kotlin/dev/inmo/tgbotapi/utils/DefaultKtorEngine.js.kt b/tgbotapi.core/src/jsMain/kotlin/dev/inmo/tgbotapi/utils/DefaultKtorEngine.js.kt
new file mode 100644
index 0000000000..c5d35e6641
--- /dev/null
+++ b/tgbotapi.core/src/jsMain/kotlin/dev/inmo/tgbotapi/utils/DefaultKtorEngine.js.kt
@@ -0,0 +1,8 @@
+package dev.inmo.tgbotapi.utils
+
+import io.ktor.client.engine.HttpClientEngineFactory
+import io.ktor.client.engine.js.Js
+
+actual val defaultKtorEngine: HttpClientEngineFactory<*> by lazy {
+    Js
+}
diff --git a/tgbotapi.core/src/jvmMain/kotlin/dev/inmo/tgbotapi/utils/DefaultKtorEngine.jvm.kt b/tgbotapi.core/src/jvmMain/kotlin/dev/inmo/tgbotapi/utils/DefaultKtorEngine.jvm.kt
new file mode 100644
index 0000000000..49256eeb2d
--- /dev/null
+++ b/tgbotapi.core/src/jvmMain/kotlin/dev/inmo/tgbotapi/utils/DefaultKtorEngine.jvm.kt
@@ -0,0 +1,8 @@
+package dev.inmo.tgbotapi.utils
+
+import io.ktor.client.engine.HttpClientEngineFactory
+import io.ktor.client.engine.java.Java
+
+actual val defaultKtorEngine: HttpClientEngineFactory<*> by lazy {
+    Java
+}
diff --git a/tgbotapi.core/src/linuxArm64Main/kotlin/bot/ktor/base/ActualPlatformClientCopy.kt b/tgbotapi.core/src/linuxArm64Main/kotlin/bot/ktor/base/ActualPlatformClientCopy.kt
index ef61138b91..f92d81bdc7 100644
--- a/tgbotapi.core/src/linuxArm64Main/kotlin/bot/ktor/base/ActualPlatformClientCopy.kt
+++ b/tgbotapi.core/src/linuxArm64Main/kotlin/bot/ktor/base/ActualPlatformClientCopy.kt
@@ -1,5 +1,6 @@
 package dev.inmo.tgbotapi.bot.ktor.base
 
+import dev.inmo.tgbotapi.utils.defaultKtorEngine
 import io.ktor.client.*
 import io.ktor.client.engine.cio.*
 
@@ -21,4 +22,8 @@ internal actual inline fun platformClientCopy(client: HttpClient): HttpClient =
     HttpClient(CIO) {
         this.plusAssign(config)
     }
-} ?: throw IllegalArgumentException("On LinuxX64 TelegramBotAPI currently support only Curl Ktor HttpClient engine")
+} ?: HttpClient(
+    defaultKtorEngine
+) {
+    install(client)
+}
diff --git a/tgbotapi.core/src/linuxMain/kotlin/dev/inmo/tgbotapi/utils/DefaultKtorEngine.linux.kt b/tgbotapi.core/src/linuxMain/kotlin/dev/inmo/tgbotapi/utils/DefaultKtorEngine.linux.kt
new file mode 100644
index 0000000000..e70d5bd60d
--- /dev/null
+++ b/tgbotapi.core/src/linuxMain/kotlin/dev/inmo/tgbotapi/utils/DefaultKtorEngine.linux.kt
@@ -0,0 +1,8 @@
+package dev.inmo.tgbotapi.utils
+
+import io.ktor.client.engine.HttpClientEngineFactory
+import io.ktor.client.engine.curl.Curl
+
+actual val defaultKtorEngine: HttpClientEngineFactory<*> by lazy {
+    Curl
+}
diff --git a/tgbotapi.core/src/linuxX64Main/kotlin/bot/ktor/base/ActualPlatformClientCopy.kt b/tgbotapi.core/src/linuxX64Main/kotlin/bot/ktor/base/ActualPlatformClientCopy.kt
index ffeaadbf1c..4a2aeef1ef 100644
--- a/tgbotapi.core/src/linuxX64Main/kotlin/bot/ktor/base/ActualPlatformClientCopy.kt
+++ b/tgbotapi.core/src/linuxX64Main/kotlin/bot/ktor/base/ActualPlatformClientCopy.kt
@@ -1,6 +1,8 @@
 package dev.inmo.tgbotapi.bot.ktor.base
 
+import dev.inmo.tgbotapi.utils.defaultKtorEngine
 import io.ktor.client.*
+import io.ktor.client.HttpClient
 import io.ktor.client.engine.curl.*
 
 /**
@@ -21,4 +23,8 @@ internal actual inline fun platformClientCopy(client: HttpClient): HttpClient =
     HttpClient(Curl) {
         this.plusAssign(config)
     }
-} ?: throw IllegalArgumentException("On LinuxX64 TelegramBotAPI currently support only Curl Ktor HttpClient engine")
+} ?: HttpClient(
+        defaultKtorEngine
+) {
+    install(client)
+}
diff --git a/tgbotapi.core/src/mingwMain/kotlin/dev/inmo/tgbotapi/utils/DefaultKtorEngine.mingw.kt b/tgbotapi.core/src/mingwMain/kotlin/dev/inmo/tgbotapi/utils/DefaultKtorEngine.mingw.kt
new file mode 100644
index 0000000000..5cbcb22faa
--- /dev/null
+++ b/tgbotapi.core/src/mingwMain/kotlin/dev/inmo/tgbotapi/utils/DefaultKtorEngine.mingw.kt
@@ -0,0 +1,8 @@
+package dev.inmo.tgbotapi.utils
+
+import io.ktor.client.engine.HttpClientEngineFactory
+import io.ktor.client.engine.winhttp.WinHttp
+
+actual val defaultKtorEngine: HttpClientEngineFactory<*> by lazy {
+    WinHttp
+}
diff --git a/tgbotapi.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/extensions/FilesDownloading.kt b/tgbotapi.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/extensions/FilesDownloading.kt
index 6b1c296f6c..c7c23734a9 100644
--- a/tgbotapi.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/extensions/FilesDownloading.kt
+++ b/tgbotapi.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/extensions/FilesDownloading.kt
@@ -2,6 +2,7 @@ package dev.inmo.tgbotapi.extensions.utils.extensions
 
 import dev.inmo.tgbotapi.types.files.PathedFile
 import dev.inmo.tgbotapi.utils.TelegramAPIUrlsKeeper
+import dev.inmo.tgbotapi.utils.defaultKtorEngine
 import io.ktor.client.HttpClient
 import io.ktor.client.request.get
 import io.ktor.client.statement.readBytes
@@ -19,5 +20,5 @@ suspend fun HttpClient.loadFile(
 
 suspend fun PathedFile.download(
     telegramAPIUrlsKeeper: TelegramAPIUrlsKeeper,
-    client: HttpClient = HttpClient()
+    client: HttpClient = HttpClient(defaultKtorEngine)
 ) = client.loadFile(telegramAPIUrlsKeeper, this)