diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 69a11be..182d3b7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,7 +12,7 @@ jobs:
     steps:
       - uses: erlef/setup-beam@v1
         with:
-          elixir-version: 1.13
+          elixir-version: 1.12
           otp-version: 24
 
       # Check out the code.