diff --git a/engine/build.gradle.kts b/engine/build.gradle.kts
index 648713e5..9984eb3b 100644
--- a/engine/build.gradle.kts
+++ b/engine/build.gradle.kts
@@ -56,7 +56,7 @@ dependencies {
       implementation(it) {
         version {
           strictly("[1.4,1.7)")
-          prefer("1.6.20")
+          prefer("1.6.21")
         }
       }
     }
diff --git a/integrationtest/build.gradle.kts b/integrationtest/build.gradle.kts
index 30e7edd9..601a4093 100644
--- a/integrationtest/build.gradle.kts
+++ b/integrationtest/build.gradle.kts
@@ -48,7 +48,7 @@ dependencies {
       implementation(it) {
         version {
           strictly("[1.4,1.7)")
-          prefer("1.6.10")
+          prefer("1.6.21")
         }
       }
     }