diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index 9de7a7c..da2cf44 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -23,6 +23,7 @@ jobs:
     - name: Configure CMake
       # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.
       # See https://cmake.org/cmake/help/latest/variable/CMAKE_BUILD_TYPE.html?highlight=cmake_build_type
+      install: libgtkmm-3.0-dev
       run: cmake -S ${{github.workspace}}/Gtkmm3_Mac -B ${{github.workspace}}/build -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}}
 
     - name: Build