diff --git a/packages/backend/package.json b/packages/backend/package.json
index 910ffd3748..ce6efde9c2 100644
--- a/packages/backend/package.json
+++ b/packages/backend/package.json
@@ -81,7 +81,7 @@
 		"koa-send": "5.0.1",
 		"koa-slow": "2.1.0",
 		"koa-views": "7.0.2",
-		"@calckey/megalodon": "5.1.2",
+		"@calckey/megalodon": "5.1.21",
 		"mfm-js": "0.23.2",
 		"mime-types": "2.1.35",
 		"multer": "1.4.4-lts.1",