diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index ff924cff..bed4addf 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -40,7 +40,7 @@ jobs:
 
       - run: opam exec -- dune build @install -p opentelemetry,opentelemetry-lwt,opentelemetry-client-ocurl,opentelemetry-cohttp-lwt,opentelemetry-client-cohttp-lwt
 
-      - run: opam pin ocaml-protoc 2.3 -y
+      - run: opam pin ocaml-protoc 2.4 -y
 
       - run: opam exec -- dune build @lint