exercism · georgyo · Nov 28, 2025 · Nov 1, 2025 · Nov 26, 2025
diff --git a/.github/Dockerfile b/.github/Dockerfile
@@ -1,4 +1,4 @@
-FROM ocaml/opam:debian-11-ocaml-5.1-afl
+FROM docker.io/ocaml/opam:debian-13-ocaml-5.4-no-flat-float-array
 
 USER root
 
@@ -33,5 +33,5 @@ RUN opam update \
     getopt \
     stdio
 
-ENV PATH="/home/opam/.opam/5.1/bin:${PATH}" \
-    MAKESYSPATH=/usr/share/bmake/mk-bmake
+ENV PATH="/home/opam/.opam/5.4/bin:${PATH}" \
+    MAKESYSPATH=/usr/share/bmake/mk-bmake
diff --git a/README.md b/README.md
@@ -15,7 +15,7 @@ notes contain a few details specific to Ocaml.
 
 **Prerequisites**
 
-- OCaml `5.1`
+- OCaml `5.4`
 - opam
 - make
 

diff --git a/docs/INSTALLATION.md b/docs/INSTALLATION.md
@@ -18,7 +18,7 @@ To work on the exercises, you will need these pieces of software:
    If you already have a switch for OCaml 5.1, either load that by running `opam switch <switch-name>`, or create a new switch by running:
 
    ```bash
-   opam switch create exercism 5.1.1
+   opam switch create exercism 5.4.0
    ```
 
    The name `exercism` here is optional, but naming your switches is a good practice.
-Original file line number
+Diff line change
@@ Expand Up / @@ -15,7 +15,7 @@ notes contain a few details specific to Ocaml. @@
     **Prerequisites**
-    - OCaml `5.1`
+    - OCaml `5.4`
     - opam
     - make
@@ Expand Down @@