diff --git a/app.sh b/app.sh
index ea18bf9..ee838dd 100644
--- a/app.sh
+++ b/app.sh
@@ -1,12 +1,10 @@
 #!/bin/bash
 
-  GIT_REPO_PATH=$(mktemp -d)
+GIT_REPO_PATH=$(mktemp -d)
 
-  git config --global user.email "$GIT_USER_MAIL"
-  git config --global user.name "$GIT_USERNAME"
+git config --global user.email "$GIT_USER_MAIL"
+git config --global user.name "$GIT_USERNAME"
 
-  echo "[INFO] clone repository..."
-  GIT_SSH_COMMAND="ssh -o StrictHostKeyChecking=no -i $GIT_REPO_DEPLOY_KEY" git clone "$GIT_REPO_URL" "$GIT_REPO_PATH" --quiet > /dev/null
 echo "[INFO] check variables..."
 if [ -z "$GIT_REPO_DEPLOY_KEY" ] ; then
     echo "[ERROR] \$GIT_REPO_DEPLOY_KEY is not set."
@@ -41,7 +39,13 @@ if [ -z "$DEVICES" ] ; then
     exit 3
 fi
 
+echo "[INFO] clone repository..."
+if GIT_SSH_COMMAND="ssh -o StrictHostKeyChecking=no -i $GIT_REPO_DEPLOY_KEY" git clone "$GIT_REPO_URL" "$GIT_REPO_PATH" --quiet > /dev/null; then
   cd "$GIT_REPO_PATH" || exit
+else
+  echo "[ERROR] Failed to clone repository."
+  exit 1
+fi
 
 while true ; do
   echo "[INFO] pull repository..."