diff --git a/.github/workflows/build-and-release.yml b/.github/workflows/build-and-release.yml
index 6fd84f3..c6dc041 100644
--- a/.github/workflows/build-and-release.yml
+++ b/.github/workflows/build-and-release.yml
@@ -17,6 +17,9 @@ jobs:
           version: "0.5.14"
           python-version: "3.9"
 
+      - name: Check if lockfile is up to date
+        run: uv lock --check
+
       - name: Build package
         run: uv build
 
diff --git a/.github/workflows/python-compatibility.yml b/.github/workflows/python-compatibility.yml
index 1c2fa78..374fa86 100644
--- a/.github/workflows/python-compatibility.yml
+++ b/.github/workflows/python-compatibility.yml
@@ -23,6 +23,9 @@ jobs:
           version: "0.5.14"
           python-version: ${{ matrix.python-version }}
 
+      - name: Check if lockfile is up to date
+        run: uv lock --check
+
       - name: Install the project
         run: uv sync --all-extras