diff --git a/.github/workflows/pytest.yml b/.github/workflows/pytest.yml
index 44c4a82e7..026ebedac 100644
--- a/.github/workflows/pytest.yml
+++ b/.github/workflows/pytest.yml
@@ -98,12 +98,12 @@ jobs:
       if: matrix.c2a_user == 'subobc'
       working-directory: ./examples/mobc
       run: |
-        cargo build
+        cargo build --locked
 
     - name: build C2A
       working-directory: ./examples/${{ matrix.c2a_user }}
       run: |
-        cargo build
+        cargo build --locked
 
     - name: run mobc C2A
       if: matrix.c2a_user == 'mobc'
diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 1f750f519..76c5ba012 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -40,7 +40,7 @@ jobs:
         uses: sksat/action-clippy@v1.1.0
         with:
           reporter: ${{ github.event_name == 'pull_request' && 'github-pr-review' || 'github-check' }}
-          clippy_flags: --workspace --all-features
+          clippy_flags: --workspace --all-features --locked
 
       - name: format
         run: cargo fmt --all -- --check