diff --git a/pkgs/applications/networking/instant-messengers/telegram/tdesktop/default.nix b/pkgs/applications/networking/instant-messengers/telegram/tdesktop/default.nix
index 17c9f9114a1..95c19eb2f1d 100644
--- a/pkgs/applications/networking/instant-messengers/telegram/tdesktop/default.nix
+++ b/pkgs/applications/networking/instant-messengers/telegram/tdesktop/default.nix
@@ -45,6 +45,7 @@
 , libsysprof-capture
 , libpsl
 , brotli
+, microsoft_gsl
 }:
 
 # Main reference:
@@ -59,7 +60,7 @@ let
 in
 mkDerivation rec {
   pname = "telegram-desktop";
-  version = "3.0.1";
+  version = "3.1.0";
   # Note: Update via pkgs/applications/networking/instant-messengers/telegram/tdesktop/update.py
 
   # Telegram-Desktop with submodules
@@ -68,7 +69,7 @@ mkDerivation rec {
     repo = "tdesktop";
     rev = "v${version}";
     fetchSubmodules = true;
-    sha256 = "196w82a92jahz7caqv2cyhhq53xm3figa7kiq59kid5wbqg33c9x";
+    sha256 = "0507qdkz8gn0gyyhxsy4mc4rs2r94s1ipqfxrc6ghgj43jkrklx3";
   };
 
   postPatch = ''
@@ -136,6 +137,7 @@ mkDerivation rec {
     libsysprof-capture
     libpsl
     brotli
+    microsoft_gsl
   ];
 
   cmakeFlags = [
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 e553c95990e..60baf734aa1 100644
--- a/pkgs/applications/networking/instant-messengers/telegram/tdesktop/tg_owt.nix
+++ b/pkgs/applications/networking/instant-messengers/telegram/tdesktop/tg_owt.nix
@@ -8,13 +8,13 @@
 
 stdenv.mkDerivation {
   pname = "tg_owt";
-  version = "unstable-2021-06-27";
+  version = "unstable-2021-09-15";
 
   src = fetchFromGitHub {
     owner = "desktop-app";
     repo = "tg_owt";
-    rev = "91d836dc84a16584c6ac52b36c04c0de504d9c34";
-    sha256 = "1ir4svv5mijpzr0rmx65088iikck83vhcdqrpf9dnk6yp4j9v4v2";
+    rev = "575fb17d2853c43329e45f6693370f5e41668055";
+    sha256 = "17lhy5g4apdakspv75zm070k7003crf1i80m8wy8f631s86v30md";
     fetchSubmodules = true;
   };