That's not a dependency...

Author: jakezatecky

package.json

@@ -30,6 +30,7 @@
     "babel-core": "^6.13.2",
     "babel-eslint": "^8.0.0",
     "babel-loader": "^7.0.0",
+    "babel-preset-env": "^1.6.0",
     "babel-preset-react": "^6.11.1",
     "babel-preset-stage-2": "^6.5.0",
     "browser-sync": "^2.18.6",
@@ -58,7 +59,6 @@
     "webpack-stream": "^4.0.0"
   },
   "dependencies": {
-    "babel-preset-env": "^1.6.0",
     "classnames": "^2.2.5",
     "lodash": "^4.17.4",
     "prop-types": "^15.5.8",