diff --git a/package.json b/package.json
index f85d9a4d6..c958245ec 100644
--- a/package.json
+++ b/package.json
@@ -187,8 +187,8 @@
     "xcode": "^0.8.2",
     "xmldoc": "^0.4.0",
     "yargs": "^3.24.0",
-    "yeoman-environment": "~1.2.7",
-    "yeoman-generator": "^0.20.3",
+    "yeoman-environment": "1.5.3",
+    "yeoman-generator": "0.21.2",
     "mime-types": "2.1.11",
     "whatwg-fetch": "^1.0.0"
   },