diff --git a/node_modules/mem/package.json b/node_modules/mem/package.json
index dba9edb686..35ce23e54e 100644
--- a/node_modules/mem/package.json
+++ b/node_modules/mem/package.json
@@ -39,7 +39,7 @@
   "devDependencies": {
     "ava": "^2.4.0",
     "delay": "^4.1.0",
-    "serialize-javascript": "^2.1.0",
+    "serialize-javascript": "^3.1.0",
     "tsd": "^0.11.0",
     "xo": "^0.25.3"
   }