diff --git a/pkgs/tools/misc/lolcat/Gemfile.lock b/pkgs/tools/misc/lolcat/Gemfile.lock
index 1ef7e5527961..3c4646ddf48f 100644
--- a/pkgs/tools/misc/lolcat/Gemfile.lock
+++ b/pkgs/tools/misc/lolcat/Gemfile.lock
@@ -1,7 +1,7 @@
 GEM
   remote: http://rubygems.org/
   specs:
-    lolcat (99.9.10)
+    lolcat (99.9.11)
       manpages (~> 0.6.1)
       paint (~> 2.0.0)
       trollop (~> 2.1.2)
diff --git a/pkgs/tools/misc/lolcat/gemset.nix b/pkgs/tools/misc/lolcat/gemset.nix
index 78677edcc34b..86069f7ecc0e 100644
--- a/pkgs/tools/misc/lolcat/gemset.nix
+++ b/pkgs/tools/misc/lolcat/gemset.nix
@@ -3,10 +3,10 @@
     dependencies = ["manpages" "paint" "trollop"];
     source = {
       remotes = ["http://rubygems.org"];
-      sha256 = "0fidwmgywkklxf2a4f4dl82b8mx4w4n73vqm6jqgyqd3nfmgysnl";
+      sha256 = "1z0j354sj2qm2srgz3i28s347fwylvv1j614806cr33zcd1j4mwp";
       type = "gem";
     };
-    version = "99.9.10";
+    version = "99.9.11";
   };
   manpages = {
     source = {