diff --git a/.github/actions/publish/action.yaml b/.github/actions/publish/action.yaml
index 4a037cb..f59e36f 100644
--- a/.github/actions/publish/action.yaml
+++ b/.github/actions/publish/action.yaml
@@ -1,5 +1,9 @@
 name: run publish
 
+defaults:
+  run:
+    shell: bash
+
 runs:
   using: composite
   steps:
diff --git a/.github/actions/test/action.yaml b/.github/actions/test/action.yaml
index b2efbc1..0172151 100644
--- a/.github/actions/test/action.yaml
+++ b/.github/actions/test/action.yaml
@@ -1,5 +1,9 @@
 name: run tests
 
+defaults:
+  run:
+    shell: bash
+
 runs:
   using: composite
   steps: