diff --git a/pkgs/development/libraries/wt/default.nix b/pkgs/development/libraries/wt/default.nix
index 958257ffe76d7e..319b0effc5788a 100644
--- a/pkgs/development/libraries/wt/default.nix
+++ b/pkgs/development/libraries/wt/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchFromGitHub, cmake, boost, pkgconfig, doxygen, qt48Full, libharu
 , pango, fcgi, firebird, mysql, postgresql, graphicsmagick, glew, openssl
-, pcre
+, pcre, harfbuzz
 }:
 
 let
@@ -31,6 +31,7 @@ let
         "-DWT_CPP_11_MODE=-std=c++11"
         "-DGM_PREFIX=${graphicsmagick}"
         "-DMYSQL_PREFIX=${mysql.connector-c}"
+        "-DHARFBUZZ_INCLUDE_DIR=${harfbuzz.dev}/include"
         "--no-warn-unused-cli"
       ];
 
@@ -44,12 +45,12 @@ let
     };
 in {
   wt3 = generic {
-    version = "3.4.0";
-    sha256 = "0y0b2h9jf5cg1gdh48dj32pj5nsvipab1cgygncxf98c46ikhysg";
+    version = "3.4.1";
+    sha256 = "1bsx7hmy6g2x9p3vl5xw9lv1xk891pnvs93a87s15g257gznkjmj";
   };
 
   wt4 = generic {
-    version = "4.1.0";
-    sha256 = "1a9nl5gs8m8pssf2l3z6kbl2rc9fw5ad7lfslw5yr3gzi0zqn05x";
+    version = "4.1.1";
+    sha256 = "1f1imx5kbpqlysrqx5h75hf2f8pkq972rz42x0pl6cxbnsyzngid";
   };
 }