diff --git a/CHANGELOG.md b/CHANGELOG.md
index b7a826cacdbd..fa19f72b016a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## 5.0.5
+
+- [esm]: `module` in `package.json` now provides a `es5` build instead of `es2015`
+
 ## 5.0.4
 
 - [integrations] fix: Not requiring angular types
diff --git a/packages/browser/test/manual/npm-build.js b/packages/browser/test/manual/npm-build.js
index bd325feba1c9..95cc794e4861 100644
--- a/packages/browser/test/manual/npm-build.js
+++ b/packages/browser/test/manual/npm-build.js
@@ -10,9 +10,9 @@ webpack(
       path: __dirname,
       filename: 'tmp.js',
     },
-    resolve: {
-      mainFields: ['main'],
-    },
+    // resolve: {
+    //   mainFields: ['main'],
+    // },
     mode: 'development',
   },
   (err, stats) => {
diff --git a/packages/integrations/package.json b/packages/integrations/package.json
index 223147638142..637e504e84e0 100644
--- a/packages/integrations/package.json
+++ b/packages/integrations/package.json
@@ -43,7 +43,7 @@
     "build:watch:es5": "tsc -p tsconfig.build.json -w --preserveWatchOutput",
     "build:watch:esm": "tsc -p tsconfig.esm.json -w --preserveWatchOutput",
     "build:bundle": "rollup --config",
-    "clean": "rimraf dist coverage *.js *.js.map *.d.ts",
+    "clean": "rimraf dist coverage esm build .rpt2_cache",
     "link:yarn": "yarn link",
     "lint": "run-s lint:prettier lint:tslint",
     "lint:prettier": "prettier-check \"{src,test}/**/*.ts\"",
diff --git a/tsconfig.esm.json b/tsconfig.esm.json
index 392692512630..2d7d146b93ae 100644
--- a/tsconfig.esm.json
+++ b/tsconfig.esm.json
@@ -1,7 +1,7 @@
 {
   "extends": "./tsconfig.json",
   "compilerOptions": {
-    "target": "es6",
+    "target": "es5",
     "module": "es6"
   }
 }