diff --git a/.github/workflows/gh-pages.yml b/.github/workflows/gh-pages.yml
index ca2bcad4..457b0c35 100644
--- a/.github/workflows/gh-pages.yml
+++ b/.github/workflows/gh-pages.yml
@@ -17,6 +17,7 @@ jobs:
         with:
           ocaml-compiler: '5.0'
           dune-cache: true
+          allow-prerelease-opam: true
 
       - name: Deps
         run: opam install odig moonpool