diff --git a/pkgs/tools/graphics/gifsicle/default.nix b/pkgs/tools/graphics/gifsicle/default.nix
index 7c5f9eaf5de..05ce6b6f7c9 100644
--- a/pkgs/tools/graphics/gifsicle/default.nix
+++ b/pkgs/tools/graphics/gifsicle/default.nix
@@ -4,11 +4,11 @@ with stdenv.lib;
 
 stdenv.mkDerivation rec {
   name = "gifsicle-${version}";
-  version = "1.90";
+  version = "1.91";
 
   src = fetchurl {
     url = "http://www.lcdf.org/gifsicle/${name}.tar.gz";
-    sha256 = "0kc35g99fygzjj7qjcy87rdb8mbgmacr2mga9ihgln1dfnbb0wrd";
+    sha256 = "00586z1yz86qcblgmf16yly39n4lkjrscl52hvfxqk14m81fckha";
   };
 
   buildInputs = optional gifview [ xproto libXt libX11 ];