diff --git a/Dockerfile b/Dockerfile
index 4dc8462..6769896 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -19,7 +19,7 @@ FROM tier/shibboleth_sp
 ARG registry=docker.io
 ARG maintainer=tier
 ARG imagename=comanage
-ARG version=3.1.0
+ARG version=3.1.0-rc1
 ARG tierversion=17040
 
 MAINTAINER $maintainer