diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9119e90..f4b05e5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,7 +16,7 @@ jobs:
         os:
           - ubuntu-latest
         ocaml-compiler:
-          - 5.2.x
+          - 5.3.x
 
     runs-on: ${{ matrix.os }}
 
diff --git a/.github/workflows/more-ci.yml b/.github/workflows/more-ci.yml
index facf66d..d25bdf5 100644
--- a/.github/workflows/more-ci.yml
+++ b/.github/workflows/more-ci.yml
@@ -29,12 +29,13 @@ jobs:
           - ubuntu-latest
           - windows-latest
         ocaml-compiler:
+          - 5.3.x
           - 5.2.x
           - 4.14.x
         exclude:
           # We exclude the combination already tested in the 'ci' workflow.
           - os: ubuntu-latest
-            ocaml-compiler: 5.2.x
+            ocaml-compiler: 5.3.x
           # We exclude windows-4.14 - this fails when building core.
           - os: windows-latest
             ocaml-compiler: 4.14.x
diff --git a/.ocamlformat b/.ocamlformat
index 04d5660..3802be7 100644
--- a/.ocamlformat
+++ b/.ocamlformat
@@ -1,2 +1,4 @@
 version=0.27.0
+ocaml-version=4.14
 profile=janestreet
+parse-docstrings=true