diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1e0d3e3..bc31201 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `publication.platform` changed to `publishing.platform`
 - Dokka version to `1.4.30`
 - `useDateTime` in extension
+- Kotlin 1.5
 
 ### Deprecated
 
diff --git a/build.gradle.kts b/build.gradle.kts
index 66fd477..47f10dc 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -8,7 +8,7 @@ plugins {
 }
 
 group = "ru.mipt.npm"
-version = "0.9.3"
+version = "0.9.4"
 
 description = "Build tools for DataForge and kscience projects"
 
@@ -20,7 +20,7 @@ repositories {
     maven("https://dl.bintray.com/kotlin/kotlin-dev")
 }
 
-val kotlinVersion = "1.4.32"
+val kotlinVersion = "1.5.0-M2"
 
 java {
     targetCompatibility = JavaVersion.VERSION_1_8
diff --git a/src/main/kotlin/ru/mipt/npm/gradle/KScienceVersions.kt b/src/main/kotlin/ru/mipt/npm/gradle/KScienceVersions.kt
index 46f095f..9fa3180 100644
--- a/src/main/kotlin/ru/mipt/npm/gradle/KScienceVersions.kt
+++ b/src/main/kotlin/ru/mipt/npm/gradle/KScienceVersions.kt
@@ -6,13 +6,13 @@ import org.gradle.api.JavaVersion
  * Build constants
  */
 object KScienceVersions {
-    const val kotlinVersion = "1.4.32"
+    const val kotlinVersion = "1.5.0-M2"
     const val kotlinxNodeVersion = "0.0.7"
     const val coroutinesVersion = "1.4.3"
     const val serializationVersion = "1.1.0"
     const val atomicVersion = "0.15.1"
-    const val ktorVersion = "1.5.2"
-    const val htmlVersion = "0.7.2"
+    const val ktorVersion = "1.5.3"
+    const val htmlVersion = "0.7.3"
     const val dateTimeVersion = "0.1.1"
 
     val JVM_TARGET = JavaVersion.VERSION_11
diff --git a/src/main/kotlin/ru/mipt/npm/gradle/internal/common.kt b/src/main/kotlin/ru/mipt/npm/gradle/internal/common.kt
index 93071a2..74ec198 100644
--- a/src/main/kotlin/ru/mipt/npm/gradle/internal/common.kt
+++ b/src/main/kotlin/ru/mipt/npm/gradle/internal/common.kt
@@ -8,9 +8,9 @@ import org.gradle.kotlin.dsl.maven
 import org.jetbrains.kotlin.gradle.plugin.LanguageSettingsBuilder
 
 internal fun LanguageSettingsBuilder.applySettings(): Unit {
-    languageVersion = "1.4"
+    languageVersion = "1.5"
+    apiVersion = "1.5"
     progressiveMode = true
-    enableLanguageFeature("InlineClasses")
     useExperimentalAnnotation("kotlin.Experimental")
     useExperimentalAnnotation("kotlin.ExperimentalUnsignedTypes")
     useExperimentalAnnotation("kotlin.ExperimentalStdlibApi")
@@ -22,6 +22,7 @@ internal fun LanguageSettingsBuilder.applySettings(): Unit {
 internal fun RepositoryHandler.applyRepos(): Unit {
     mavenCentral()
     maven("https://repo.kotlin.link")
+    maven("https://maven.pkg.jetbrains.space/public/p/kotlinx-html/maven")
     maven("https://maven.pkg.jetbrains.space/kotlin/p/kotlin/kotlin-js-wrappers")
 }