diff --git a/.github/workflows/node-build.yml b/.github/workflows/node-build.yml
index 6f10d68..a6e9c09 100644
--- a/.github/workflows/node-build.yml
+++ b/.github/workflows/node-build.yml
@@ -101,6 +101,9 @@ jobs:
     timeout-minutes: ${{ inputs.timeout-minutes }}
     permissions:
       contents: read
+    defaults:
+      run:
+        shell: bash
     steps:
       - name: Harden Runner
         uses: step-security/harden-runner@bf7454d06d71f1098171f2acdf0cd4708d7b5920 # v2.20.0
diff --git a/.github/workflows/node-test.yml b/.github/workflows/node-test.yml
index b784f5a..cf80f37 100644
--- a/.github/workflows/node-test.yml
+++ b/.github/workflows/node-test.yml
@@ -127,6 +127,9 @@ jobs:
       fail-fast: false
       matrix:
         node: ${{ fromJSON(inputs.test-matrix != '' && inputs.test-matrix || format('["{0}"]', inputs.node-version)) }}
+    defaults:
+      run:
+        shell: bash
     steps:
       - name: Harden Runner
         uses: step-security/harden-runner@bf7454d06d71f1098171f2acdf0cd4708d7b5920 # v2.20.0
diff --git a/.github/workflows/python-ci.yml b/.github/workflows/python-ci.yml
index 6769d20..ca27c37 100644
--- a/.github/workflows/python-ci.yml
+++ b/.github/workflows/python-ci.yml
@@ -218,6 +218,7 @@ jobs:
         python: ${{ fromJSON(inputs.python-versions) }}
     defaults:
       run:
+        shell: bash
         working-directory: ${{ inputs.working-directory }}
     steps:
       - name: Harden Runner