diff --git a/jsk_robot_common/jsk_robot_startup/scripts/update_workspace_main.sh b/jsk_robot_common/jsk_robot_startup/scripts/update_workspace_main.sh
index 3629d9ca5a..fc728cfce3 100755
--- a/jsk_robot_common/jsk_robot_startup/scripts/update_workspace_main.sh
+++ b/jsk_robot_common/jsk_robot_startup/scripts/update_workspace_main.sh
@@ -86,7 +86,7 @@ wstool update -t $WORKSPACE/src $(rospack find jsk_robot_startup)/../.. --delete
 ln -sf $ROSINSTALL $WORKSPACE/src/.rosinstall
 wstool update -t $WORKSPACE/src --delete-changed-uris
 # When the repository's Spec-Version branch has commits which are not pushed to remote, they are evacuated to another branch
-wstool foreach -t $WORKSPACE/src --git --shell 'expected_version=$(wstool info . | grep Spec-Version: | awk '{print $2}'); current_version=$(git rev-parse --abbrev-ref HEAD); remote_diff=$(git diff --stat $current_version origin/$current_version); if [ "$expected_version" == "$current_version" ] && [ -n "$remote_diff" ]; then git checkout -b ${expected_version}-patch-$(date +%Y%m%d%H%M%S); git checkout origin/$expected_version; git branch -D $expected_version; git checkout -b $expected_version --track origin/$expected_version; fi'
+wstool foreach -t $WORKSPACE/src --git --shell 'expected_version=$(wstool info . | grep Spec-Version: | awk '\''{print $2}'\''); current_version=$(git rev-parse --abbrev-ref HEAD); remote_diff=$(git diff --stat $current_version origin/$current_version); if [ "$expected_version" == "$current_version" ] && [ -n "$remote_diff" ]; then git checkout -b ${expected_version}-patch-$(date +%Y%m%d%H%M%S); git checkout origin/$expected_version; git branch -D $expected_version; git checkout -b $expected_version --track origin/$expected_version; fi'
 wstool update -t $WORKSPACE/src
 WSTOOL_UPDATE_RESULT=$?
 # Rosdep Install