diff --git a/gradle.properties b/gradle.properties
index cc5ef4dd40..c1d890e1a3 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -3,7 +3,7 @@ springJavaformatVersion=0.0.31
 springBootVersion=2.4.2
 springFrameworkVersion=5.3.20
 openSamlVersion=3.4.6
-version=5.5.8
+version=5.5.9-SNAPSHOT
 kotlinVersion=1.5.32
 samplesBranch=5.5.x
 org.gradle.jvmargs=-Xmx3g -XX:MaxPermSize=2048m -XX:+HeapDumpOnOutOfMemoryError