diff --git a/pkgs/development/ocaml-modules/ocamlformat/ocamlformat-rpc-lib.nix b/pkgs/development/ocaml-modules/ocamlformat/ocamlformat-rpc-lib.nix
index abd3a33dde8e..a4492b2ead38 100644
--- a/pkgs/development/ocaml-modules/ocamlformat/ocamlformat-rpc-lib.nix
+++ b/pkgs/development/ocaml-modules/ocamlformat/ocamlformat-rpc-lib.nix
@@ -4,8 +4,8 @@
 let source =
   if lib.versionAtLeast ocaml.version "4.13"
   then {
-    version = "0.21.0";
-    sha256 = "sha256-KhgX9rxYH/DM6fCqloe4l7AnJuKrdXSe6Y1XY3BXMy0=";
+    version = "0.26.0";
+    sha256 = "sha256-AxSUq3cM7xCo9qocvrVmDkbDqmwM1FexEP7IWadeh30=";
   } else {
     version = "0.20.0";
     sha256 = "sha256-JtmNCgwjbCyUE4bWqdH5Nc2YSit+rekwS43DcviIfgk=";