diff --git a/with-gatsby/package.json b/with-gatsby/package.json
index 6956ef3..7310947 100644
--- a/with-gatsby/package.json
+++ b/with-gatsby/package.json
@@ -21,7 +21,6 @@
     "gatsby-plugin-webpack-bundle-analyzer": "^1.0.5",
     "gatsby-source-filesystem": "^2.1.35",
     "gatsby-transformer-sharp": "^2.3.1",
-    "prop-types": "^15.7.2",
     "react": "~16.11.0",
     "react-dom": "~16.11.0",
     "react-helmet": "^5.2.1",