diff --git a/pkgs/development/libraries/haskell/wai-handler-launch/default.nix b/pkgs/development/libraries/haskell/wai-handler-launch/default.nix
index c4d22a66e00..3ba78e16251 100644
--- a/pkgs/development/libraries/haskell/wai-handler-launch/default.nix
+++ b/pkgs/development/libraries/haskell/wai-handler-launch/default.nix
@@ -4,8 +4,8 @@
 
 cabal.mkDerivation (self: {
   pname = "wai-handler-launch";
-  version = "1.3.1.5";
-  sha256 = "1iz36j7lzl5c9b2hacxv4v5gfzkfvgj7hlb5xz4r14ca4w5fzzfj";
+  version = "2.0.0";
+  sha256 = "1z03c3hjkh4k6j5dsp4973f05rk2cgl7gazac4vdq4imwfzxj3lg";
   buildDepends = [
     blazeBuilder blazeBuilderConduit conduit httpTypes transformers wai
     warp zlibConduit