diff --git a/package.json b/package.json
index 2caf2eb..b2f81fa 100644
--- a/package.json
+++ b/package.json
@@ -37,7 +37,7 @@
   "devDependencies": {
     "@types/node": "^14.14.5",
     "browserify": "^17.0.0",
-    "testem": "^3.2.0",
+    "testem": "^3.4.2",
     "typescript": "^4.0.5"
   }
 }