diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7d55ad42..e60766f8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,9 @@ _Note: Gaps between patch versions are faulty, broken or test releases._
 
 <!-- Add changelog entries for new changes under this section -->
 
+* **Improvements**
+  * Add support for .mjs output files ([#252](https://github.com/webpack-contrib/webpack-bundle-analyzer/pull/252), [@jlopezxs](https://github.com/jlopezxs)))
+
 ## 3.1.0
 
 * **Bug Fix**
diff --git a/src/analyzer.js b/src/analyzer.js
index d7f60e09..62ac9968 100644
--- a/src/analyzer.js
+++ b/src/analyzer.js
@@ -10,6 +10,7 @@ const {parseBundle} = require('./parseUtils');
 const {createAssetsFilter} = require('./utils');
 
 const FILENAME_QUERY_REGEXP = /\?.*$/;
+const FILENAME_EXTENSIONS = /\.(js|mjs)$/i;
 
 module.exports = {
   getViewerData,
@@ -29,13 +30,13 @@ function getViewerData(bundleStats, bundleDir, opts) {
     bundleStats = bundleStats.children[0];
   }
 
-  // Picking only `*.js` assets from bundle that has non-empty `chunks` array
+  // Picking only `*.js or *.mjs` assets from bundle that has non-empty `chunks` array
   bundleStats.assets = _.filter(bundleStats.assets, asset => {
     // Removing query part from filename (yes, somebody uses it for some reason and Webpack supports it)
     // See #22
     asset.name = asset.name.replace(FILENAME_QUERY_REGEXP, '');
 
-    return _.endsWith(asset.name, '.js') && !_.isEmpty(asset.chunks) && isAssetIncluded(asset.name);
+    return FILENAME_EXTENSIONS.test(asset.name) && !_.isEmpty(asset.chunks) && isAssetIncluded(asset.name);
   });
 
   // Trying to parse bundle assets and get real module sizes if `bundleDir` is provided
diff --git a/test/analyzer.js b/test/analyzer.js
index b7c3b025..d5c0a05e 100644
--- a/test/analyzer.js
+++ b/test/analyzer.js
@@ -101,6 +101,11 @@ describe('Analyzer', function () {
       expect(typeof item.parsedSize).to.equal('number');
     });
   });
+
+  it('should support stats files with js modules chunk', async function () {
+    generateReportFrom('with-modules-chunk.json');
+    await expectValidReport({bundleLabel: 'bundle.mjs'});
+  });
 });
 
 function generateReportFrom(statsFilename) {
diff --git a/test/stats/with-modules-chunk.json b/test/stats/with-modules-chunk.json
new file mode 100644
index 00000000..1db8a848
--- /dev/null
+++ b/test/stats/with-modules-chunk.json
@@ -0,0 +1,312 @@
+{
+  "errors": [],
+  "warnings": [],
+  "version": "1.14.0",
+  "hash": "4e39ab22a848116a4c15",
+  "children": [
+    {
+      "errors": [],
+      "warnings": [],
+      "version": "1.14.0",
+      "hash": "4e39ab22a848116a4c15",
+      "time": 79,
+      "publicPath": "",
+      "assetsByChunkName": {
+        "bundle": "bundle.mjs"
+      },
+      "assets": [
+        {
+          "name": "bundle.mjs",
+          "size": 1735,
+          "chunks": [0],
+          "chunkNames": ["bundle"],
+          "emitted": true
+        }
+      ],
+      "chunks": [
+        {
+          "id": 0,
+          "rendered": true,
+          "initial": true,
+          "entry": true,
+          "extraAsync": false,
+          "size": 141,
+          "names": ["bundle"],
+          "files": ["bundle.mjs"],
+          "hash": "eb0091314b5c4ca75abf",
+          "parents": [],
+          "modules": [
+            {
+              "id": 0,
+              "identifier": "/Volumes/Work/webpack-bundle-analyzer/test/src/index.js",
+              "name": "./src/index.js",
+              "index": 0,
+              "index2": 3,
+              "size": 54,
+              "cacheable": true,
+              "built": true,
+              "optional": false,
+              "prefetched": false,
+              "chunks": [0],
+              "assets": [],
+              "issuer": null,
+              "profile": {
+                "factory": 19,
+                "building": 15
+              },
+              "failed": false,
+              "errors": 0,
+              "warnings": 0,
+              "reasons": [],
+              "source": "require('./a');\nrequire('./b');\nrequire('./a-clone');\n"
+            },
+            {
+              "id": 1,
+              "identifier": "/Volumes/Work/webpack-bundle-analyzer/test/src/a.js",
+              "name": "./src/a.js",
+              "index": 1,
+              "index2": 0,
+              "size": 29,
+              "cacheable": true,
+              "built": true,
+              "optional": false,
+              "prefetched": false,
+              "chunks": [0],
+              "assets": [],
+              "issuer": "/Volumes/Work/webpack-bundle-analyzer/test/src/index.js",
+              "profile": {
+                "factory": 8,
+                "building": 6
+              },
+              "failed": false,
+              "errors": 0,
+              "warnings": 0,
+              "reasons": [
+                {
+                  "moduleId": 0,
+                  "moduleIdentifier": "/Volumes/Work/webpack-bundle-analyzer/test/src/index.js",
+                  "module": "./src/index.js",
+                  "moduleName": "./src/index.js",
+                  "type": "cjs require",
+                  "userRequest": "./a",
+                  "loc": "1:0-14"
+                }
+              ],
+              "source": "module.exports = 'module a';\n"
+            },
+            {
+              "id": 2,
+              "identifier": "/Volumes/Work/webpack-bundle-analyzer/test/src/b.js",
+              "name": "./src/b.js",
+              "index": 2,
+              "index2": 1,
+              "size": 29,
+              "cacheable": true,
+              "built": true,
+              "optional": false,
+              "prefetched": false,
+              "chunks": [0],
+              "assets": [],
+              "issuer": "/Volumes/Work/webpack-bundle-analyzer/test/src/index.js",
+              "profile": {
+                "factory": 9,
+                "building": 5
+              },
+              "failed": false,
+              "errors": 0,
+              "warnings": 0,
+              "reasons": [
+                {
+                  "moduleId": 0,
+                  "moduleIdentifier": "/Volumes/Work/webpack-bundle-analyzer/test/src/index.js",
+                  "module": "./src/index.js",
+                  "moduleName": "./src/index.js",
+                  "type": "cjs require",
+                  "userRequest": "./b",
+                  "loc": "2:0-14"
+                }
+              ],
+              "source": "module.exports = 'module b';\n"
+            },
+            {
+              "id": 3,
+              "identifier": "/Volumes/Work/webpack-bundle-analyzer/test/src/a-clone.js",
+              "name": "./src/a-clone.js",
+              "index": 3,
+              "index2": 2,
+              "size": 29,
+              "cacheable": true,
+              "built": true,
+              "optional": false,
+              "prefetched": false,
+              "chunks": [0],
+              "assets": [],
+              "issuer": "/Volumes/Work/webpack-bundle-analyzer/test/src/index.js",
+              "profile": {
+                "factory": 10,
+                "building": 5
+              },
+              "failed": false,
+              "errors": 0,
+              "warnings": 0,
+              "reasons": [
+                {
+                  "moduleId": 0,
+                  "moduleIdentifier": "/Volumes/Work/webpack-bundle-analyzer/test/src/index.js",
+                  "module": "./src/index.js",
+                  "moduleName": "./src/index.js",
+                  "type": "cjs require",
+                  "userRequest": "./a-clone",
+                  "loc": "3:0-20"
+                }
+              ],
+              "source": "module.exports = 'module a';\n"
+            }
+          ],
+          "filteredModules": 0,
+          "origins": [
+            {
+              "moduleId": 0,
+              "module": "/Volumes/Work/webpack-bundle-analyzer/test/src/index.js",
+              "moduleIdentifier": "/Volumes/Work/webpack-bundle-analyzer/test/src/index.js",
+              "moduleName": "./src/index.js",
+              "loc": "",
+              "name": "bundle",
+              "reasons": []
+            }
+          ]
+        }
+      ],
+      "modules": [
+        {
+          "id": 0,
+          "identifier": "/Volumes/Work/webpack-bundle-analyzer/test/src/index.js",
+          "name": "./src/index.js",
+          "index": 0,
+          "index2": 3,
+          "size": 54,
+          "cacheable": true,
+          "built": true,
+          "optional": false,
+          "prefetched": false,
+          "chunks": [0],
+          "assets": [],
+          "issuer": null,
+          "profile": {
+            "factory": 19,
+            "building": 15
+          },
+          "failed": false,
+          "errors": 0,
+          "warnings": 0,
+          "reasons": [],
+          "source": "require('./a');\nrequire('./b');\nrequire('./a-clone');\n"
+        },
+        {
+          "id": 1,
+          "identifier": "/Volumes/Work/webpack-bundle-analyzer/test/src/a.js",
+          "name": "./src/a.js",
+          "index": 1,
+          "index2": 0,
+          "size": 29,
+          "cacheable": true,
+          "built": true,
+          "optional": false,
+          "prefetched": false,
+          "chunks": [0],
+          "assets": [],
+          "issuer": "/Volumes/Work/webpack-bundle-analyzer/test/src/index.js",
+          "profile": {
+            "factory": 8,
+            "building": 6
+          },
+          "failed": false,
+          "errors": 0,
+          "warnings": 0,
+          "reasons": [
+            {
+              "moduleId": 0,
+              "moduleIdentifier": "/Volumes/Work/webpack-bundle-analyzer/test/src/index.js",
+              "module": "./src/index.js",
+              "moduleName": "./src/index.js",
+              "type": "cjs require",
+              "userRequest": "./a",
+              "loc": "1:0-14"
+            }
+          ],
+          "source": "module.exports = 'module a';\n"
+        },
+        {
+          "id": 2,
+          "identifier": "/Volumes/Work/webpack-bundle-analyzer/test/src/b.js",
+          "name": "./src/b.js",
+          "index": 2,
+          "index2": 1,
+          "size": 29,
+          "cacheable": true,
+          "built": true,
+          "optional": false,
+          "prefetched": false,
+          "chunks": [0],
+          "assets": [],
+          "issuer": "/Volumes/Work/webpack-bundle-analyzer/test/src/index.js",
+          "profile": {
+            "factory": 9,
+            "building": 5
+          },
+          "failed": false,
+          "errors": 0,
+          "warnings": 0,
+          "reasons": [
+            {
+              "moduleId": 0,
+              "moduleIdentifier": "/Volumes/Work/webpack-bundle-analyzer/test/src/index.js",
+              "module": "./src/index.js",
+              "moduleName": "./src/index.js",
+              "type": "cjs require",
+              "userRequest": "./b",
+              "loc": "2:0-14"
+            }
+          ],
+          "source": "module.exports = 'module b';\n"
+        },
+        {
+          "id": 3,
+          "identifier": "/Volumes/Work/webpack-bundle-analyzer/test/src/a-clone.js",
+          "name": "./src/a-clone.js",
+          "index": 3,
+          "index2": 2,
+          "size": 29,
+          "cacheable": true,
+          "built": true,
+          "optional": false,
+          "prefetched": false,
+          "chunks": [0],
+          "assets": [],
+          "issuer": "/Volumes/Work/webpack-bundle-analyzer/test/src/index.js",
+          "profile": {
+            "factory": 10,
+            "building": 5
+          },
+          "failed": false,
+          "errors": 0,
+          "warnings": 0,
+          "reasons": [
+            {
+              "moduleId": 0,
+              "moduleIdentifier": "/Volumes/Work/webpack-bundle-analyzer/test/src/index.js",
+              "module": "./src/index.js",
+              "moduleName": "./src/index.js",
+              "type": "cjs require",
+              "userRequest": "./a-clone",
+              "loc": "3:0-20"
+            }
+          ],
+          "source": "module.exports = 'module a';\n"
+        }
+      ],
+      "filteredModules": 0,
+      "children": []
+    }
+  ]
+}