diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index 489a4ad..51ca00c 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -9,7 +9,8 @@ on:
 jobs:
   build:
     runs-on: ubuntu-24.04
-    container: ubuntu:20.04
+    container: 
+      image: ubuntu:20.04
     
     strategy:
       matrix: