diff --git a/VERSION b/VERSION
index 0faee7d..ebfa5e0 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-6.3
+6.3.1_rc1
diff --git a/manifest.appcache b/manifest.appcache
index 92edca5..9e547bd 100644
--- a/manifest.appcache
+++ b/manifest.appcache
@@ -1,5 +1,5 @@
 CACHE MANIFEST
-# 6.3
+# 6.3.1_rc1
 
 css/uhr.css
 css/uhr-black.css