diff --git a/Containerfile b/Containerfile
index f16f25f..45ad48b 100644
--- a/Containerfile
+++ b/Containerfile
@@ -36,7 +36,7 @@ ARG SOURCE_IMAGE="aurora"
 ARG SOURCE_SUFFIX="-main"
 
 ## SOURCE_TAG arg must be a version built for the specific image: eg, 39, 40, gts, latest
-ARG SOURCE_TAG="latest"
+ARG SOURCE_TAG="39"
 
 
 ### 2. SOURCE IMAGE