diff --git a/gradle.properties b/gradle.properties
index 35b8f7e90e..990cf86fdd 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -2,7 +2,7 @@ enablePublishing=false
 fiatVersion=1.44.0
 includeProviders=basic,iap,ldap,oauth2,saml,x509
 korkVersion=7.222.0
-kotlinVersion=1.5.32
+kotlinVersion=1.6.21
 org.gradle.parallel=true
 spinnakerGradleVersion=8.32.1
 targetJava11=true
diff --git a/gradle/kotlin-test.gradle b/gradle/kotlin-test.gradle
index 5ce62286c1..dbcbd0744c 100644
--- a/gradle/kotlin-test.gradle
+++ b/gradle/kotlin-test.gradle
@@ -32,7 +32,7 @@ dependencies {
 
 compileTestKotlin {
   kotlinOptions {
-    languageVersion = "1.5"
+    languageVersion = "1.6"
     jvmTarget = "11"
   }
 }
diff --git a/gradle/kotlin.gradle b/gradle/kotlin.gradle
index d857ea3d61..fb3bcd0a57 100644
--- a/gradle/kotlin.gradle
+++ b/gradle/kotlin.gradle
@@ -19,14 +19,14 @@ apply plugin: "kotlin-spring"
 
 compileKotlin {
   kotlinOptions {
-    languageVersion = "1.5"
+    languageVersion = "1.6"
     jvmTarget = "11"
   }
 }
 
 compileTestKotlin {
   kotlinOptions {
-    languageVersion = "1.5"
+    languageVersion = "1.6"
     jvmTarget = "11"
   }
 }