diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7904d45..5081af2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,11 +16,11 @@ jobs:
       matrix:
         include:
           - pair:
-              elixir: 1.12
-              otp: 22.3
+              elixir: "1.12"
+              otp: "24.3"
           - pair:
-              elixir: 1.20
-              otp: 29
+              elixir: "1.20"
+              otp: "29"
 
     steps:
       - uses: erlef/setup-beam@v1