diff --git a/pkgs/development/libraries/haskell/doctest/default.nix b/pkgs/development/libraries/haskell/doctest/default.nix
index 185f8034381..08118ac4e1b 100644
--- a/pkgs/development/libraries/haskell/doctest/default.nix
+++ b/pkgs/development/libraries/haskell/doctest/default.nix
@@ -4,8 +4,8 @@
 
 cabal.mkDerivation (self: {
   pname = "doctest";
-  version = "0.9.8";
-  sha256 = "0c1qi1dfqndbkaiksffw54gv6nlhd3wsk25s97vhrgmpd3n7sb8a";
+  version = "0.9.9";
+  sha256 = "1r1jdmch6sb4cdygh60pv42p4nr03shabrpd18hjnxs40dgc6pgy";
   isLibrary = true;
   isExecutable = true;
   buildDepends = [ deepseq filepath ghcPaths syb transformers ];