diff --git a/.github/workflows/main-stock-ubuntu.yml b/.github/workflows/main-stock-ubuntu.yml
index 5153b0bc..cb6fda3b 100644
--- a/.github/workflows/main-stock-ubuntu.yml
+++ b/.github/workflows/main-stock-ubuntu.yml
@@ -34,7 +34,7 @@ jobs:
           echo "::group::clone catch2"
           git clone https://github.com/catchorg/Catch2.git
           cd Catch2
-          git checkout v3.4.0
+          git checkout v2.13.8
           echo "::group::catch2 configure"
           mkdir .build
           cmake -B .build -S .