diff --git a/reactive/webflux/kotlin/hello-security/gradle.properties b/reactive/webflux/kotlin/hello-security/gradle.properties
index 7def6a0..384a463 100644
--- a/reactive/webflux/kotlin/hello-security/gradle.properties
+++ b/reactive/webflux/kotlin/hello-security/gradle.properties
@@ -1 +1 @@
-spring-security.version=5.4.0.BUILD-SNAPSHOT
+spring-security.version=5.5.0-SNAPSHOT
diff --git a/servlet/spring-boot/kotlin/hello-security/gradle.properties b/servlet/spring-boot/kotlin/hello-security/gradle.properties
index 7def6a0..384a463 100644
--- a/servlet/spring-boot/kotlin/hello-security/gradle.properties
+++ b/servlet/spring-boot/kotlin/hello-security/gradle.properties
@@ -1 +1 @@
-spring-security.version=5.4.0.BUILD-SNAPSHOT
+spring-security.version=5.5.0-SNAPSHOT