diff --git a/mysql-backup-s3/backup.sh b/mysql-backup-s3/backup.sh
index d53844c..0d0c36a 100644
--- a/mysql-backup-s3/backup.sh
+++ b/mysql-backup-s3/backup.sh
@@ -3,13 +3,11 @@
 set -e
 
 if [ "${S3_ACCESS_KEY_ID}" == "**None**" ]; then
-  echo "You need to set the S3_ACCESS_KEY_ID environment variable."
-  exit 1
+  echo "Warning: You did not set the S3_ACCESS_KEY_ID environment variable."
 fi
 
 if [ "${S3_SECRET_ACCESS_KEY}" == "**None**" ]; then
-  echo "You need to set the S3_SECRET_ACCESS_KEY environment variable."
-  exit 1
+  echo "Warning: You did not set the S3_SECRET_ACCESS_KEY environment variable."
 fi
 
 if [ "${S3_BUCKET}" == "**None**" ]; then