diff --git a/gradle.properties b/gradle.properties
index 6112aca501..03e6fb03de 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,3 +1,3 @@
-gaeVersion=1.9.64
+gaeVersion=1.9.66
 springBootVersion=2.1.0.M4
 version=5.1.1.BUILD-SNAPSHOT