diff --git a/.github/workflows/opam.yml b/.github/workflows/opam.yml
index e7df55b3..c0298aef 100644
--- a/.github/workflows/opam.yml
+++ b/.github/workflows/opam.yml
@@ -21,7 +21,7 @@ jobs:
     - uses: actions/checkout@v4
     - uses: ocaml/setup-ocaml@v2
       with:
-        ocaml-compiler: 4.09
+        ocaml-compiler: 4.14
     - run: opam install dune
     - run: opam install . --deps-only --with-test
     - run: opam exec -- dune build --profile release
diff --git a/Dockerfile b/Dockerfile
index bcbb09a3..8718c33e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ocaml/opam:ubuntu-20.04-ocaml-4.09
+FROM ocaml/opam:ubuntu-20.04-ocaml-4.14
 
 # Install system dependencies
 USER root