diff --git a/gradle.properties b/gradle.properties
index a829c77f32f2..4299a628ed06 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,13 +1,13 @@
 group           = org.junit
-version         = 5.5.0
+version         = 5.5.1-SNAPSHOT
 
 jupiterGroup    = org.junit.jupiter
 
 platformGroup   = org.junit.platform
-platformVersion = 1.5.0
+platformVersion = 1.5.1-SNAPSHOT
 
 vintageGroup    = org.junit.vintage
-vintageVersion  = 5.5.0
+vintageVersion  = 5.5.1-SNAPSHOT
 
 defaultBuiltBy  = JUnit Team
 releaseBranch   = master