diff --git a/.github/workflows/dependabot-yarn-mirror.yml b/.github/workflows/dependabot-yarn-mirror.yml
index ed0b4fdab..1e3620079 100644
--- a/.github/workflows/dependabot-yarn-mirror.yml
+++ b/.github/workflows/dependabot-yarn-mirror.yml
@@ -15,24 +15,19 @@ jobs:
         node-version: ['14.x']
     steps:
       - uses: actions/checkout@v2
-        with:
-          token: ${{secrets.GH_TOKEN}}
       - uses: fregante/setup-git-user@v1
       - name: Use Node.js
         uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node-version }}
           cache: yarn
-      - name: Get branch name
-        shell: bash
-        run: echo "##[set-output name=branch;]$(echo ${GITHUB_REF#refs/heads/})"
-        id: get_branch
       - name: Update yarn offline mirror
         if: contains(github.event.pull_request.labels.*.name, 'dependencies')
         run: |
+          git checkout -b ${{github.event.pull_request.head.ref}}
           yarn
           git add -A
           if [[ ! -z $(git status -s) ]] ; then
             git commit -m "chore(yarn): update yarn offline mirror"
-            git push origin ${{ steps.get_branch.outputs.branch }}
+            git push origin ${{ github.head_ref }}
           fi
diff --git a/.yarn/offline-mirror/@types-webpack-env-1.14.0.tgz b/.yarn/offline-mirror/@types-webpack-env-1.14.0.tgz
deleted file mode 100644
index 770c143b8..000000000
Binary files a/.yarn/offline-mirror/@types-webpack-env-1.14.0.tgz and /dev/null differ
diff --git a/.yarn/offline-mirror/@types-webpack-env-1.16.0.tgz b/.yarn/offline-mirror/@types-webpack-env-1.16.0.tgz
deleted file mode 100644
index aa3a2ad7f..000000000
Binary files a/.yarn/offline-mirror/@types-webpack-env-1.16.0.tgz and /dev/null differ
diff --git a/.yarn/offline-mirror/@types-webpack-env-1.16.3.tgz b/.yarn/offline-mirror/@types-webpack-env-1.16.3.tgz
new file mode 100644
index 000000000..169da4a67
Binary files /dev/null and b/.yarn/offline-mirror/@types-webpack-env-1.16.3.tgz differ
diff --git a/package.json b/package.json
index 8b011dcd6..73cbf3fc4 100644
--- a/package.json
+++ b/package.json
@@ -141,7 +141,7 @@
     "@types/bluebird": "^3.5.36",
     "@types/jasmine": "^3.10.2",
     "@types/lodash-es": "^4.17.5",
-    "@types/webpack-env": "^1.14.0",
+    "@types/webpack-env": "^1.16.3",
     "@typescript-eslint/eslint-plugin": "^3.10.1",
     "@typescript-eslint/parser": "^3.10.1",
     "@webcomponents/custom-elements": "^1.5.0",
diff --git a/yarn.lock b/yarn.lock
index 7bc9513f0..af1b0a38d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5620,15 +5620,10 @@
   resolved "https://registry.yarnpkg.com/@types/unist/-/unist-2.0.3.tgz#9c088679876f374eb5983f150d4787aa6fb32d7e"
   integrity sha512-FvUupuM3rlRsRtCN+fDudtmytGO6iHJuuRKS1Ss0pG5z8oX0diNEw94UEL7hgDbpN94rgaK5R7sWm6RrSkZuAQ==
 
-"@types/webpack-env@^1.14.0":
-  version "1.14.0"
-  resolved "https://registry.yarnpkg.com/@types/webpack-env/-/webpack-env-1.14.0.tgz#8edfc5f8e6eae20eeed3ca0d02974ed4ee5e4efc"
-  integrity sha512-Fv+0gYJzE/czLoRKq+gnXWr4yBpPM3tO3C8pDLFwqVKlMICQUq5OsxwwFZYDaVr7+L6mgNDp16iOcJHEz3J5RQ==
-
-"@types/webpack-env@^1.16.0":
-  version "1.16.0"
-  resolved "https://registry.yarnpkg.com/@types/webpack-env/-/webpack-env-1.16.0.tgz#8c0a9435dfa7b3b1be76562f3070efb3f92637b4"
-  integrity sha512-Fx+NpfOO0CpeYX2g9bkvX8O5qh9wrU1sOF4g8sft4Mu7z+qfe387YlyY8w8daDyDsKY5vUxM0yxkAYnbkRbZEw==
+"@types/webpack-env@^1.16.0", "@types/webpack-env@^1.16.3":
+  version "1.16.3"
+  resolved "https://registry.yarnpkg.com/@types/webpack-env/-/webpack-env-1.16.3.tgz#b776327a73e561b71e7881d0cd6d34a1424db86a"
+  integrity sha512-9gtOPPkfyNoEqCQgx4qJKkuNm/x0R2hKR7fdl7zvTJyHnIisuE/LfvXOsYWL0o3qq6uiBnKZNNNzi3l0y/X+xw==
 
 "@types/webpack-sources@*":
   version "1.4.2"