diff --git a/pkgs/development/libraries/haskell/HaXml/default.nix b/pkgs/development/libraries/haskell/HaXml/default.nix
index 00a5cba60ef..188377b8e94 100644
--- a/pkgs/development/libraries/haskell/HaXml/default.nix
+++ b/pkgs/development/libraries/haskell/HaXml/default.nix
@@ -1,9 +1,10 @@
-{cabal}:
+{cabal, polyparse}:
 
 cabal.mkDerivation (self : {
   pname = "HaXml";
-  version = "1.13.3";
-  sha256 = "08d9wy0rg9m66dd10x0zvkl74l25vxdakz7xp3j88s2gd31jp1v0";
+  version = "1.20.2";
+  sha256 = "05kmr2ablinnrg3x1xr19g5kzzby322lblvcvhwbkv26ajwi0b63";
+  propagatedBuildInputs = [polyparse];
   meta = {
     description = "Haskell utilities for parsing, filtering, transforming and generating XML documents.";
   };
diff --git a/pkgs/development/libraries/haskell/json/default.nix b/pkgs/development/libraries/haskell/json/default.nix
index 5a59e94396b..08cc6e0ee3d 100644
--- a/pkgs/development/libraries/haskell/json/default.nix
+++ b/pkgs/development/libraries/haskell/json/default.nix
@@ -2,8 +2,8 @@
 
 cabal.mkDerivation (self : {
   pname = "json";
-  version = "0.4.3";
-  sha256 = "56192d1e922cc71ad1aaf31baea8ee7e1f1b862f95bc72f60548caee4a484a87";
+  version = "0.4.4";
+  sha256 = "102qmz55b2mgcca3q1c2pkcr6hz7kmpldad3f6blhmp1cz15f081";
   propagatedBuildInputs = [mtl];
   meta = {
     description = "Support for serialising Haskell to and from JSON";