diff --git a/entrypoint.sh b/entrypoint.sh
index 4c4efcd..00e3485 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -37,9 +37,8 @@ _git_push() {
 
 # PROGRAM
 echo "Installing prettier..."
-if ! $INPUT_PRETTIER_VERSION; then
+if ! "$INPUT_PRETTIER_VERSION"; then
   npm install --silent --global prettier
-
 else
   npm install --silent --global prettier@$INPUT_PRETTIER_VERSION
 fi