diff --git a/pkgs/development/libraries/haskell/tagsoup/default.nix b/pkgs/development/libraries/haskell/tagsoup/default.nix
index 5dc83178be00..3258267f0120 100644
--- a/pkgs/development/libraries/haskell/tagsoup/default.nix
+++ b/pkgs/development/libraries/haskell/tagsoup/default.nix
@@ -2,8 +2,8 @@
 
 cabal.mkDerivation (self: {
   pname = "tagsoup";
-  version = "0.13";
-  sha256 = "1pfkcfrmhzxplfkdzb0zj24dfsddw91plqp3mg2gqkv82y8blzk1";
+  version = "0.12.8";
+  sha256 = "05cm9h80qmxvk7xhlgly9zcmpbsajagspaa8p6k4ddch6q9lj7m3";
   isLibrary = true;
   isExecutable = true;
   buildDepends = [ text ];