diff --git a/run.sh b/run.sh
index 61e3f89746..128d07ec0f 100755
--- a/run.sh
+++ b/run.sh
@@ -6,7 +6,7 @@ SRC_DIR="/work/ITK"
 BLD_DIR="/work/ITK-bld"
 
 # If the SRC_DIR is not mounted, then this tag will be checked out
-GIT_TAG=${GIT_TAG:-"main"}
+GIT_TAG=${GIT_TAG:-"master"}
 
 set -xe