diff --git a/package.json b/package.json
index e4bfbe3..c19da56 100644
--- a/package.json
+++ b/package.json
@@ -33,7 +33,7 @@
   },
   "dependencies": {
     "check-types": "~1.3.2",
-    "qs": "^4.0.0",
+    "qs": "^6.9.4",
     "request": "~2.44.0",
     "waitress": ">=0.0.2"
   },