diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index c6c6faa9..bad229cf 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -42,8 +42,8 @@ jobs:
           allow-prerelease-opam: true
 
       - run: |
-          opam pin trace https://github.com/ocaml-tracing/ocaml-trace.git#simon/full-refactor-open-sum-types-no-more-manual-spans -y -n
-          opam pin ambient-context https://github.com/ocaml-tracing/ambient-context.git#simon/simpler-interface -y -n
+          opam pin trace https://github.com/ocaml-tracing/ocaml-trace.git#main -y -n
+          opam pin https://github.com/ocaml-tracing/ambient-context.git#simon/simpler-interface -y -n
           opam install pbrt.4.0 -y
           opam install ambient-context