diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index a28345c..8f47d34 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -16,7 +16,7 @@ jobs:
         os:
             - ubuntu-latest
         ocaml-compiler:
-            - '4.12'
+            - '4.14'
             - '5.0'
             - '5.3'
 
diff --git a/dune-project b/dune-project
index 511de79..4675388 100644
--- a/dune-project
+++ b/dune-project
@@ -36,7 +36,7 @@
  (synopsis "Use nanoev from picos")
  (depends
   (ocaml
-   (>= 4.12))
+   (>= 4.14))
   dune
   base-unix
   (nanoev
diff --git a/nanoev-picos.opam b/nanoev-picos.opam
index 6c5e442..d1c2f71 100644
--- a/nanoev-picos.opam
+++ b/nanoev-picos.opam
@@ -8,7 +8,7 @@ tags: ["unix" "select" "async"]
 homepage: "https://github.com/c-cube/nanoev"
 bug-reports: "https://github.com/c-cube/nanoev/issues"
 depends: [
-  "ocaml" {>= "4.12"}
+  "ocaml" {>= "4.14"}
   "dune" {>= "2.7"}
   "base-unix"
   "nanoev" {= version}