diff --git a/gradle.properties b/gradle.properties
index e2fcb6741..27ca521c4 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -2,7 +2,7 @@ fiatVersion=1.28.0
 korkVersion=7.132.0
 kotlinVersion=1.4.0
 org.gradle.parallel=true
-spinnakerGradleVersion=8.20.0
+spinnakerGradleVersion=8.21.0
 targetJava11=true
 
 # To enable a composite reference to a project, set the