diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index c2263157..5c5bda10 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -85,6 +85,8 @@ jobs:
     strategy:
       matrix:
         pair:
+          - { erlang: "27", elixir: "1.18.0-rc.0" }
+          - { erlang: "26", elixir: "1.18.0-rc.0" }
           - { erlang: "27", elixir: "1.17", latest: true }
           - { erlang: "26", elixir: "1.17" }
           - { erlang: "26", elixir: "1.16" }