diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index e345ac36..a3728ddb 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -39,7 +39,7 @@ jobs:
           python-version: 3.12
 
       - name: Setup Zephyr project
-        uses: zephyrproject-rtos/action-zephyr-setup@v1
+        uses: zephyrproject-rtos/action-zephyr-setup@f7b70269a8eb01f70c8e710891e4c94972a2f6b4 # v1.0.6
         with:
           app-path: apptest
           manifest-file-name: ci-manifest.yml
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 0e65bd73..62628414 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -29,7 +29,7 @@ jobs:
           python-version: 3.12
 
       - name: Setup Zephyr project
-        uses: zephyrproject-rtos/action-zephyr-setup@v1
+        uses: zephyrproject-rtos/action-zephyr-setup@f7b70269a8eb01f70c8e710891e4c94972a2f6b4 # v1.0.6
         with:
           app-path: zephyr-lang-rust
           manifest-file-name: ci-manifest.yml