diff --git a/gradle.properties b/gradle.properties
index 35ae2a94fc..7ec7728ab3 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,6 +1,6 @@
 fiatVersion=1.44.0
 korkVersion=7.222.0
-kotlinVersion=1.5.32
+kotlinVersion=1.6.21
 org.gradle.parallel=true
 org.gradle.jvmargs=-Xmx6g
 spinnakerGradleVersion=8.32.1
diff --git a/gradle/kotlin.gradle b/gradle/kotlin.gradle
index bc186112a5..6a3e764b0d 100644
--- a/gradle/kotlin.gradle
+++ b/gradle/kotlin.gradle
@@ -24,14 +24,14 @@ dependencies {
 
 compileKotlin {
   kotlinOptions {
-    languageVersion = "1.5"
+    languageVersion = "1.6"
     jvmTarget = "11"
   }
 }
 
 compileTestKotlin {
   kotlinOptions {
-    languageVersion = "1.5"
+    languageVersion = "1.6"
     jvmTarget = "11"
   }
 }