diff --git a/pkgs/development/interpreters/tclreadline/default.nix b/pkgs/development/interpreters/tclreadline/default.nix
index de5f3174506b..57f7f9a7b194 100644
--- a/pkgs/development/interpreters/tclreadline/default.nix
+++ b/pkgs/development/interpreters/tclreadline/default.nix
@@ -10,13 +10,13 @@
 
 tcl.mkTclDerivation rec {
   pname = "tclreadline";
-  version = "2.3.8";
+  version = "2.4.0";
 
   src = fetchFromGitHub {
     owner = "flightaware";
     repo = "tclreadline";
     rev = "v${version}";
-    sha256 = "18jl56p0hwgynxpvr0v7b5mvvzc1m64fn61c0957bgb45mc250yq";
+    sha256 = "sha256-rB2bR0yu/ZFf/WOgo1LeLmciaQA42/LulnqSczmzea8=";
   };
 
   nativeBuildInputs = [