diff --git a/submod.sh b/submod.sh
new file mode 100755
index 0000000..e941660
--- /dev/null
+++ b/submod.sh
@@ -0,0 +1,13 @@
+#!/bin/bash
+set -ex
+git submodule update --init --recursive
+cd circle-stdlib/
+git checkout e318f89 # Needed to support Circle develop?
+cd -
+cd circle-stdlib/libs/circle
+git checkout ec09d7e # develop
+cd -
+cd circle-stdlib/libs/circle-newlib
+git checkout 48bf91d # needed for circle ec09d7e
+cd -
+