diff --git a/buildSrc/src/main/kotlin/Versions.kt b/buildSrc/src/main/kotlin/Versions.kt
index 8063399..18a7463 100644
--- a/buildSrc/src/main/kotlin/Versions.kt
+++ b/buildSrc/src/main/kotlin/Versions.kt
@@ -30,7 +30,7 @@ object Versions {
 
     const val dokka_gradle_plugin: String = "0.9.17" // available: "0.11.0-dev-59"
 
-    const val org_jetbrains_kotlin: String = "1.4.0-rc"
+    const val org_jetbrains_kotlin: String = "1.4.0"
 
     const val atomicfu_gradle_plugin: String = "0.14.3-1.4.0-rc"
 
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 50b57bf..8e9e2e9 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.5-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.6-all.zip