diff --git a/package.json b/package.json
index d93443c..a49b56f 100644
--- a/package.json
+++ b/package.json
@@ -14,13 +14,13 @@
     "test": "node ./test | tap-spec"
   },
   "dependencies": {
-    "modify-babel-preset": "^3.0.0"
+    "modify-babel-preset": "^3.1.0"
   },
   "peerDependencies": {
     "babel-preset-es2015": "*"
   },
   "devDependencies": {
-    "babel-preset-es2015": "^6.13.2",
+    "babel-preset-es2015": "~6.9.0",
     "tap-spec": "^4.1.1",
     "tape": "^4.6.0"
   }