diff --git a/.github/workflows/doc.yml b/.github/workflows/doc.yml
index 4a4eb60cd..1f5d2e690 100644
--- a/.github/workflows/doc.yml
+++ b/.github/workflows/doc.yml
@@ -34,7 +34,7 @@ jobs:
         opam repo add coq-dev https://coq.inria.fr/opam/core-dev
         opam repo add extra-dev https://coq.inria.fr/opam/extra-dev
         opam update
-        opam install coq-serapi ./coq-elpi.opam coq-core.8.20.0
+        opam install coq-serapi ./coq-elpi.opam coq-core.8.20+rc1
         sudo apt-get update
         sudo apt-get install python3-pip -y
         pip3 install git+https://github.com/cpitclaudel/alectryon.git@c8ab1ec