diff --git a/pkgs/development/ocaml-modules/eio/default.nix b/pkgs/development/ocaml-modules/eio/default.nix
index 224e6051eb04..f9714ee8fbf1 100644
--- a/pkgs/development/ocaml-modules/eio/default.nix
+++ b/pkgs/development/ocaml-modules/eio/default.nix
@@ -1,7 +1,13 @@
 {
   lib,
   ocaml,
-  version ? if lib.versionAtLeast ocaml.version "5.1" then "1.2" else "0.12",
+  version ?
+    if lib.versionAtLeast ocaml.version "5.2" then
+      "1.3"
+    else if lib.versionAtLeast ocaml.version "5.1" then
+      "1.2"
+    else
+      "0.12",
   buildDunePackage,
   bigstringaf,
   cstruct,
@@ -29,6 +35,10 @@ let
         minimalOCamlVersion = "5.1";
         hash = "sha256-N5LpEr2NSUuy449zCBgl5NISsZcM8sHxspZsqp/WvEA=";
       };
+      "1.3" = {
+        minimalOCamlVersion = "5.2";
+        hash = "sha256-jtXBPmaJ8xyF3KXxJ2LYS4zABCp7B9PkZN9utLcrPfw=";
+      };
     }
     ."${version}";
 in