diff --git a/release b/release
index d99413b..0ecbe7e 100755
--- a/release
+++ b/release
@@ -34,7 +34,7 @@ fi
 echo -e "\n${GREEN}STARTING RELEASE PROCESS${COLOR_OFF}\n"
 
 set +e;
-git status | grep "working directory clean" &> /dev/null
+git status | grep -Eo "working (directory|tree) clean" &> /dev/null
 if [ ! $? -eq 0 ]; then # working directory is NOT clean
     echo -e "${RED}WARNING: You have uncomitted changes, you may have forgotten something${COLOR_OFF}\n"
     exit 1