diff --git a/main.go b/main.go
index b56e450..5a40bcf 100644
--- a/main.go
+++ b/main.go
@@ -43,6 +43,11 @@ func main() {
 		log.SetFlags(log.LstdFlags | log.Lshortfile)
 	}
 
+	// Show data loss warning
+	if config.CleanUp {
+		promptAbort("`CLEANUP` is set to `true`, which may cause data loss. Are you sure to continue?", 5)
+	}
+
 	// Connect to database
 	var err error
 	db, err = gorm.Open(config.DbDialect, utils.MakeConnectionString(config))
@@ -172,3 +177,11 @@ func migrateLanguages() {
 		}
 	}
 }
+
+func promptAbort(message string, timeoutSec int) {
+	log.Printf("[WARNING] %s.\nTo abort server startup, press Ctrl+C.\n", message)
+	for i := timeoutSec; i > 0; i-- {
+		log.Printf("Starting in %d seconds ...\n", i)
+		time.Sleep(1 * time.Second)
+	}
+}
diff --git a/version.txt b/version.txt
index bbf649f..3511591 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-1.7.3
\ No newline at end of file
+1.7.4
\ No newline at end of file