diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
index 1c5acd3..0d842b4 100644
--- a/.github/workflows/ubuntu.yml
+++ b/.github/workflows/ubuntu.yml
@@ -18,6 +18,7 @@ jobs:
 
     - name: install glfw
       run: |
+        sudo apt-get install -y xorg-dev
         git submodule update --init -- external/glfw
         cmake -S external/glfw -B external/glfwbuild
         cd external/glfwbuild