diff --git a/Dockerfile b/Dockerfile
index b393ff27..f3537a6e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@
 # STAGE 1: setup an opam switch with all dependencies installed
 #
 # (only depends on the opam files)
-FROM ocamlpro/ocaml:4.14-2023-12-24 AS dev-build-context
+FROM ocamlpro/ocaml:4.14-2024-01-14 AS dev-build-context
 # Image from https://hub.docker.com/r/ocamlpro/ocaml
 
 RUN mkdir catala
diff --git a/catala.opam b/catala.opam
index 89621a08..45bc5f47 100644
--- a/catala.opam
+++ b/catala.opam
@@ -53,6 +53,7 @@ depends: [
   "cpdf" {cataladevmode}
   "conf-diffutils" {cataladevmode}
   "z3" {catalaz3mode}
+  "conf-ninja"
 ]
 depopts: ["z3"]
 conflicts: [
@@ -80,9 +81,4 @@ depexts: [
     {cataladevmode & os-distribution = "alpine"}
   ["groff" "latex-mk" "python-pygments" "pandoc"]
     {cataladevmode & os-family = "arch"}
-  # The following should be replaced by a dependency upon `conf-ninja` once that
-  # is published
-  ["ninja-build"] {os-family = "debian" | os-family = "fedora"}
-  ["samurai"] {os-distribution = "alpine"}
-  ["ninja"] {os-family = "arch" | os-family = "suse" | os-family = "opensuse" | os-family = "bsd"}
 ]