diff --git a/create-cron-job.sh b/create-cron-job.sh
index 06dc556..ec35cdf 100755
--- a/create-cron-job.sh
+++ b/create-cron-job.sh
@@ -1,5 +1,4 @@
 #!/usr/bin/env bash
 set -e
 GIT_DIR=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" &>/dev/null && pwd)
-
-(crontab -l 2>/dev/null; echo "0 * * * * $GIT_DIR/commit.sh") | crontab -
\ No newline at end of file
+crontab -l | grep -q "* * * * * $GIT_DIR/commit.sh" || (crontab -l 2>/dev/null; echo "* * * * * $GIT_DIR/commit.sh") | crontab -
\ No newline at end of file