diff --git a/packages/next/build/webpack.js b/packages/next/build/webpack.js
index 3aeb832a..56ef6ace 100644
--- a/packages/next/build/webpack.js
+++ b/packages/next/build/webpack.js
@@ -257,16 +257,6 @@ export default async function getBaseWebpackConfig (dir: string, {dev = false, i
         name: isServer ? 'server' : 'client'
       }),
       dev && !isServer && new FriendlyErrorsWebpackPlugin(),
-      new webpack.IgnorePlugin(/(precomputed)/, /node_modules.+(elliptic)/),
-      // This removes prop-types-exact in production, as it's not used there.
-      !dev && new webpack.IgnorePlugin({
-        checkResource: (resource) => {
-          return /prop-types-exact/.test(resource)
-        },
-        checkContext: (context) => {
-          return context.indexOf(NEXT_PROJECT_ROOT_DIST) !== -1
-        }
-      }),
       // Even though require.cache is server only we have to clear assets from both compilations
       // This is because the client compilation generates the build manifest that's used on the server side
       dev && new NextJsRequireCacheHotReloader(),