diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f46ec70..c8e8d82 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,7 +16,7 @@ jobs:
       matrix:
         include:
           - pair:
-              elixir: 1.12.4
+              elixir: 1.12.3
               otp: 23.3
           - pair:
               elixir: 1.15.7