diff --git a/submod.sh b/submod.sh
index ab9ed7d..2e2f1a8 100755
--- a/submod.sh
+++ b/submod.sh
@@ -6,13 +6,13 @@ git submodule update --init --recursive
 #
 # Use fixed master branch of circle-stdlib then re-update
 cd circle-stdlib/
-git checkout tags/Step49
+git checkout 3bd135d
 git submodule update --init --recursive
 cd -
 #
 # Optional update submodules explicitly
 cd circle-stdlib/libs/circle
-git checkout c243194
+git checkout tags/Step49
 cd -
 cd circle-stdlib/libs/circle-newlib
 #git checkout develop