diff --git a/pkgs/applications/networking/instant-messengers/telegram/tdesktop/default.nix b/pkgs/applications/networking/instant-messengers/telegram/tdesktop/default.nix
index b0f7b3d54fee..feb494ee3f9c 100644
--- a/pkgs/applications/networking/instant-messengers/telegram/tdesktop/default.nix
+++ b/pkgs/applications/networking/instant-messengers/telegram/tdesktop/default.nix
@@ -32,6 +32,7 @@
 , jemalloc
 , rnnoise
 , abseil-cpp
+, kcoreaddons
   # Transitive dependencies:
 , util-linuxMinimal
 , pcre
@@ -73,7 +74,7 @@ let
 in
 env.mkDerivation rec {
   pname = "telegram-desktop";
-  version = "4.1.1";
+  version = "4.2.0";
   # Note: Update via pkgs/applications/networking/instant-messengers/telegram/tdesktop/update.py
 
   # Telegram-Desktop with submodules
@@ -82,7 +83,7 @@ env.mkDerivation rec {
     repo = "tdesktop";
     rev = "v${version}";
     fetchSubmodules = true;
-    sha256 = "0b8nwimks6hfnb3bqik8d4s9z689hhj4p9ykqgc36pmpr54nyma8";
+    sha256 = "1wpqn79pbarz48kmrh6gciw4a9y5hiki5qczlvj8smvx9is6yrf8";
   };
 
   postPatch = ''
@@ -138,6 +139,7 @@ env.mkDerivation rec {
     jemalloc
     rnnoise
     tg_owt
+    kcoreaddons
     # Transitive dependencies:
     util-linuxMinimal # Required for libmount thus not nativeBuildInputs.
     pcre
diff --git a/pkgs/applications/networking/instant-messengers/telegram/tdesktop/tg_owt.nix b/pkgs/applications/networking/instant-messengers/telegram/tdesktop/tg_owt.nix
index 590e8f337fe6..c1101a1f2d41 100644
--- a/pkgs/applications/networking/instant-messengers/telegram/tdesktop/tg_owt.nix
+++ b/pkgs/applications/networking/instant-messengers/telegram/tdesktop/tg_owt.nix
@@ -9,13 +9,13 @@
 
 stdenv.mkDerivation {
   pname = "tg_owt";
-  version = "unstable-2022-08-11";
+  version = "unstable-2022-09-14";
 
   src = fetchFromGitHub {
     owner = "desktop-app";
     repo = "tg_owt";
-    rev = "a5fbc9123e056e611e69acf0ceb4252ddd838adb";
-    sha256 = "1hzck63spjjkqzkj0mlrxygrix4lw0n3i5cmc0vkxaphfzawz74n";
+    rev = "621f3da55331733bf0d1b223786b96b68c03dca1";
+    sha256 = "0xh4mm8lpiyj3c62iarsld8q82a1w81x3dxdlcwq8s6sg3r04fns";
     fetchSubmodules = true;
   };