diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index d6d0ab7..a69147e 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -22,7 +22,9 @@ jobs:
 
       - name: Install dependencies
         if: matrix.build_type == 'Debug' && matrix.os == 'ubuntu-latest'
-        run: sudo apt-get install -y lcov valgrind
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y lcov valgrind
 
       - name: Configure CMake (Debug)
         if: matrix.build_type == 'Debug'