diff --git a/.gitignore b/.gitignore
index 360f7b9..c332a22 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,10 @@
 __pycache__/
 *.py[cod]
 *$py.class
+modules.xml
+PostgresBackup.iml
+profiles_settings.xml
+vcs.xml
 
 # C extensions
 *.so
diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 0000000..13566b8
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
diff --git a/backup.sh b/backup.sh
index b675b6b..a37f3ae 100644
--- a/backup.sh
+++ b/backup.sh
@@ -124,6 +124,7 @@ function upload_postgres_backup_to_s3() {
       local SECRET_KEY=""
       local BUCKET_NAME=""
       local ENDPOINT_URL=""
+      local BUCKET_KEEP_PREVIOUS_BACKUPS=""
 
       ACCESS_KEY="${!access_keys[i]}"
       SECRET_KEY="${!secret_keys[i]}"
@@ -145,7 +146,7 @@ function upload_postgres_backup_to_s3() {
       echo "[INFO] Uploading backup to S3 bucket $((i+1)) ..."
 
       local backup_name=""
-      if [[ "$BUCKET_KEEP_PREVIOUS_BACKUPS" == "true" ]]; then
+      if [ "$BUCKET_KEEP_PREVIOUS_BACKUPS" ]; then
         backup_name="backup_$NOW.sql"
       else
         backup_name="backup.sql"