diff --git a/CHANGES.md b/CHANGES.md
index 6db4eee0..58c91200 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,9 @@
 # Change log for kotlinx.atomicfu
 
+# Version 0.12.3
+
+* Updated to Kotlin 1.3.30
+
 # Version 0.12.2
 
 * Fixed to skip changing source path for unprocessed native output (see #51).
diff --git a/gradle.properties b/gradle.properties
index 1e9983d2..17aed6c4 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,7 +1,7 @@
-version = 0.12.2-SNAPSHOT
+version = 0.12.3-SNAPSHOT
 group = org.jetbrains.kotlinx
 
-kotlin_version=1.3.20
+kotlin_version=1.3.30
 asm_version=5.2
 slf4j_version=1.8.0-alpha2
 junit_version=4.12