diff --git a/pkg/internal/watchtower/database.go b/pkg/internal/watchtower/database.go
index dd283ad..a207b21 100644
--- a/pkg/internal/watchtower/database.go
+++ b/pkg/internal/watchtower/database.go
@@ -30,7 +30,7 @@ func BackupDb() error {
 
 	outFile := filepath.Join(
 		backupPath,
-		fmt.Sprintf("watchtower_db_backup_%s", time.Now().Format("2006-01-02 15:04:05")),
+		fmt.Sprintf("watchtower_db_backup_%s", time.Now().Format("2006-01-02_15:04:05")),
 	)
 
 	// Reading config