diff --git a/pkgs/development/ocaml-modules/elpi/default.nix b/pkgs/development/ocaml-modules/elpi/default.nix
index f9ee8ca6a193..9afe4ac9182d 100644
--- a/pkgs/development/ocaml-modules/elpi/default.nix
+++ b/pkgs/development/ocaml-modules/elpi/default.nix
@@ -8,7 +8,7 @@
 , ppxlib, ppx_deriving
 , ppxlib_0_15, ppx_deriving_0_15
 , coqPackages
-, version ? if lib.versionAtLeast ocaml.version "4.08" then "1.18.1"
+, version ? if lib.versionAtLeast ocaml.version "4.08" then "1.20.0"
     else "1.15.2"
 }:
 
@@ -16,6 +16,7 @@ let p5 = camlp5; in
 let camlp5 = p5.override { legacy = true; }; in
 
 let fetched = coqPackages.metaFetch ({
+    release."1.20.0".sha256 = "sha256-lctZAIQgOg5d+LfILtWsBVcsemV3zTZYfJfDlCxHtcA=";
     release."1.19.2".sha256 = "sha256-dBj5Ek7PWq/8Btq/dggJUqa8cUtfvbi6EWo/lJEDOU4=";
     release."1.18.1".sha256 = "sha256-rrIv/mVC0Ez3nU7fpnzwduIC3tI6l73DjgAbv1gd2v0=";
     release."1.17.0".sha256 = "sha256-J8FJBeaB+2HtHjrkgNzOZJngZ2AcYU+npL9Y1HNPnzo=";