diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 024ba658aa..fe60d650ad 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -58,6 +58,9 @@ jobs:
         uses: ocaml/setup-ocaml@v2
         with:
           ocaml-compiler: ${{ matrix.ocaml-compiler }}
+          opam-repositories: |
+            beta: https://github.com/ocaml/ocaml-beta-repository.git
+            default: https://github.com/ocaml/opam-repository.git
 
       - name: Install dependencies
         run: |