diff --git a/pkgs/development/compilers/intercal/default.nix b/pkgs/development/compilers/intercal/default.nix
index 6640c4aa89ab..d890dc0fdfad 100644
--- a/pkgs/development/compilers/intercal/default.nix
+++ b/pkgs/development/compilers/intercal/default.nix
@@ -7,11 +7,11 @@ with stdenv.lib;
 stdenv.mkDerivation rec {
 
   pname = "intercal";
-  version = "0.30";
+  version = "0.31";
 
   src = fetchurl {
     url = "http://catb.org/esr/intercal/${pname}-${version}.tar.gz";
-    sha256 = "058ppvvgz9r5603ia9jkknbrciypgg4hjbczrv9v1d9w3ak652xk";
+    sha256 = "1z2gpa5rbqb7jscqlf258k0b0jc7d2zkyipb5csjpj6d3sw45n4k";
   };
 
   buildInputs =