diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index 7a8f7beb34..74f1b43063 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -15,6 +15,9 @@ jobs:
   build-linux:
     name: Build ${{ matrix.chunk }}
     runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash
     strategy:
       matrix:
         chunk: [0, 1, 2, 3, 4, 5, 6, 7]
@@ -47,6 +50,9 @@ jobs:
   build-debug-ipv6:
     name: Debug IPv6 ${{ matrix.chunk }}
     runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash
     strategy:
       matrix:
         chunk: [0, 1, 2, 3, 4, 5, 6, 7]
@@ -110,6 +116,9 @@ jobs:
   build-mac:
     name: Mac
     runs-on: macOS-latest
+    defaults:
+      run:
+        shell: bash
     steps:
     - uses: actions/checkout@v2
       with:
@@ -139,6 +148,9 @@ jobs:
   build-pio:
     name: Build Platform.IO
     runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash
     steps:
     - uses: actions/checkout@v2
       with:
@@ -163,6 +175,9 @@ jobs:
   host-tests:
     name: Host tests
     runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash
     steps:
     - uses: actions/checkout@v2
       with:
@@ -184,6 +199,9 @@ jobs:
   documentation:
     name: Documentation
     runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash
     steps:
     - uses: actions/checkout@v2
       with:
@@ -208,6 +226,9 @@ jobs:
   style-check:
     name: Style and formatting
     runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash
     steps:
     - uses: actions/checkout@v2
       with:
@@ -229,6 +250,9 @@ jobs:
   mock-check:
     name: Mock trivial test
     runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash
     steps:
     - uses: actions/checkout@v2
       with:
@@ -248,6 +272,9 @@ jobs:
   boards-check:
     name: Boards.txt check
     runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash
     steps:
     - uses: actions/checkout@v2
       with:
@@ -275,6 +302,9 @@ jobs:
   code-spell:
     name: Check spelling
     runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash
     steps:
     - uses: actions/checkout@v2
       with:
diff --git a/.github/workflows/release-to-publish.yml b/.github/workflows/release-to-publish.yml
index 852f3b69a5..90b71d72fd 100644
--- a/.github/workflows/release-to-publish.yml
+++ b/.github/workflows/release-to-publish.yml
@@ -32,6 +32,9 @@ jobs:
   package:
     name: Update master JSON file
     runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash
     steps:
     - uses: actions/checkout@v2
       with:
@@ -42,7 +45,8 @@ jobs:
         python-version: '3.x'
     - name: Set GIT tag name
       run: |
-        echo "TRAVIS_TAG=$(git describe --exact-match --tags)" >> $GITHUB_ENV
+        TRAVIS_TAG="$(git describe --exact-match --tags)"
+        echo "TRAVIS_TAG=\"${TRAVIS_TAG}\"" >> $GITHUB_ENV
     - name: Deploy updated JSON
       env:
         TRAVIS_BUILD_DIR: ${{ github.workspace }}
diff --git a/.github/workflows/tag-to-draft-release.yml b/.github/workflows/tag-to-draft-release.yml
index 7830743318..e649723982 100644
--- a/.github/workflows/tag-to-draft-release.yml
+++ b/.github/workflows/tag-to-draft-release.yml
@@ -14,6 +14,9 @@ jobs:
   package:
     name: Package
     runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash
     steps:
     - uses: actions/checkout@v2
       with:
@@ -25,7 +28,8 @@ jobs:
     - name: Set GIT tag name
       run: |
         # Sets an environment variable used in the next steps
-        echo "TRAVIS_TAG=$(git describe --exact-match --tags)" >> $GITHUB_ENV
+        TRAVIS_TAG="$(git describe --exact-match --tags)"
+        echo "TRAVIS_TAG=\"${TRAVIS_TAG}\"" >> $GITHUB_ENV
     - name: Build package JSON
       env:
         TRAVIS_BUILD_DIR: ${{ github.workspace }}