diff --git a/bench.Dockerfile b/bench.Dockerfile
index c6ce6112ee..1245344c24 100644
--- a/bench.Dockerfile
+++ b/bench.Dockerfile
@@ -8,4 +8,4 @@ RUN opam remote add origin https://github.com/ocaml/opam-repository.git && opam
 RUN opam pin -yn --with-version=dev .
 RUN opam install -y --deps-only --with-test .
 COPY . ./
-RUN opam exec -- make bench
+ENTRYPOINT opam exec -- make bench