diff --git a/pkgs/by-name/fl/fleng/package.nix b/pkgs/by-name/fl/fleng/package.nix
index d48866bb6629..f1b14a8807f9 100644
--- a/pkgs/by-name/fl/fleng/package.nix
+++ b/pkgs/by-name/fl/fleng/package.nix
@@ -6,11 +6,11 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "fleng";
-  version = "20";
+  version = "23";
 
   src = fetchurl {
     url = "http://www.call-with-current-continuation.org/fleng/fleng-${finalAttrs.version}.tgz";
-    hash = "sha256-kkouDNbdVGE7vskmu8kISA/RHIGed5vLY/ch4qgew3g=";
+    hash = "sha256-I8ksy3UAah/LTvtNrzjhw5vNUM55ba80ivo4S/r5yHg=";
   };
 
   doCheck = true;