diff --git a/pkgs/development/ocaml-modules/atd/default.nix b/pkgs/development/ocaml-modules/atd/default.nix
index e3e056f5442..c6047f4ea1b 100644
--- a/pkgs/development/ocaml-modules/atd/default.nix
+++ b/pkgs/development/ocaml-modules/atd/default.nix
@@ -4,6 +4,8 @@ buildDunePackage rec {
   pname = "atd";
   version = "2.0.0";
 
+  minimumOCamlVersion = "4.02";
+
   src = fetchFromGitHub {
     owner = "mjambon";
     repo = pname;
diff --git a/pkgs/development/ocaml-modules/bisect_ppx-ocamlbuild/default.nix b/pkgs/development/ocaml-modules/bisect_ppx-ocamlbuild/default.nix
index fd3e7d58ae3..38673fb9ddc 100644
--- a/pkgs/development/ocaml-modules/bisect_ppx-ocamlbuild/default.nix
+++ b/pkgs/development/ocaml-modules/bisect_ppx-ocamlbuild/default.nix
@@ -1,6 +1,7 @@
 { buildDunePackage, bisect_ppx, ocamlbuild }:
 
 buildDunePackage rec {
+  minimumOCamlVersion = "4.02";
   inherit (bisect_ppx) version src meta;
   pname = "bisect_ppx-ocamlbuild";
   propagatedBuildInputs = [ ocamlbuild ];
diff --git a/pkgs/development/ocaml-modules/dtoa/default.nix b/pkgs/development/ocaml-modules/dtoa/default.nix
index a5164ab7fa9..87d9ac7a324 100644
--- a/pkgs/development/ocaml-modules/dtoa/default.nix
+++ b/pkgs/development/ocaml-modules/dtoa/default.nix
@@ -4,7 +4,7 @@ buildDunePackage rec {
   pname = "dtoa";
   version = "0.3.1";
 
-  minimumOCamlVersion = "4.01";
+  minimumOCamlVersion = "4.02";
 
   src = fetchurl {
     url = "https://github.com/flowtype/ocaml-${pname}/releases/download/v${version}/${pname}-${version}.tbz";
diff --git a/pkgs/development/ocaml-modules/opti/default.nix b/pkgs/development/ocaml-modules/opti/default.nix
index 7b084e61688..f6552d57683 100644
--- a/pkgs/development/ocaml-modules/opti/default.nix
+++ b/pkgs/development/ocaml-modules/opti/default.nix
@@ -4,6 +4,8 @@ buildDunePackage rec {
   pname = "opti";
   version = "1.0.3";
 
+  minimumOCamlVersion = "4.02";
+
   src = fetchurl {
     url = "https://github.com/magnusjonsson/opti/releases/download/${version}/opti-${version}.tbz";
     sha256 = "ed9ba56dc06e9d2b1bf097964cc65ea37db787d4f239c13d0dd74693f5b50a1e";
diff --git a/pkgs/development/ocaml-modules/wtf8/default.nix b/pkgs/development/ocaml-modules/wtf8/default.nix
index 7f3686abb51..4c820d13808 100644
--- a/pkgs/development/ocaml-modules/wtf8/default.nix
+++ b/pkgs/development/ocaml-modules/wtf8/default.nix
@@ -4,7 +4,7 @@ buildDunePackage rec {
   pname = "wtf8";
   version = "1.0.1";
 
-  minimumOCamlVersion = "4.01";
+  minimumOCamlVersion = "4.02";
 
   src = fetchurl {
     url = "https://github.com/flowtype/ocaml-${pname}/releases/download/v${version}/${pname}-${version}.tbz";
diff --git a/pkgs/development/tools/ocaml/utop/default.nix b/pkgs/development/tools/ocaml/utop/default.nix
index be6bb73aab8..d9e563952ea 100644
--- a/pkgs/development/tools/ocaml/utop/default.nix
+++ b/pkgs/development/tools/ocaml/utop/default.nix
@@ -2,7 +2,7 @@
 , lambdaTerm, cppo, makeWrapper
 }:
 
-if !stdenv.lib.versionAtLeast ocaml.version "4.02"
+if !stdenv.lib.versionAtLeast ocaml.version "4.03"
 then throw "utop is not available for OCaml ${ocaml.version}"
 else