diff --git a/.github/workflows/pr.yml b/.github/workflows/pr.yml
index 48613388..42aea03d 100644
--- a/.github/workflows/pr.yml
+++ b/.github/workflows/pr.yml
@@ -20,7 +20,7 @@ jobs:
 
       - name: Install dependencies on Ubuntu
         if: startsWith(matrix.os, 'ubuntu')
-        run: sudo apt-get install cmake pkg-config libgtk-3-dev
+        run: sudo apt-get update && sudo apt-get install cmake pkg-config libgtk-3-dev
 
       - uses: actions-rs/toolchain@v1
         with: