diff --git a/pkgs/servers/mautrix-telegram/default.nix b/pkgs/servers/mautrix-telegram/default.nix
index 140289ae418d..ba6e624ba355 100644
--- a/pkgs/servers/mautrix-telegram/default.nix
+++ b/pkgs/servers/mautrix-telegram/default.nix
@@ -11,11 +11,11 @@ let
     self = python;
     packageOverrides = self: super: {
       tulir-telethon = self.telethon.overridePythonAttrs (oldAttrs: rec {
-        version = "1.37.0a1";
-        pname = "tulir-telethon";
+        version = "1.99.0a6";
+        pname = "tulir_telethon";
         src = fetchPypi {
           inherit pname version;
-          hash = "sha256-FckMHqGaBsqvFbrEnDWqJAQG8j/euY2NooesnxV6Kcc=";
+          hash = "sha256-ewqc6s5xXquZJTZVBsFmHeamBLDw6PnTSNcmTNKD0sk=";
         };
         doCheck = false;
       });
@@ -24,14 +24,14 @@ let
 in
 python.pkgs.buildPythonPackage rec {
   pname = "mautrix-telegram";
-  version = "0.15.2";
+  version = "0.15.3";
   disabled = python.pythonOlder "3.8";
 
   src = fetchFromGitHub {
     owner = "mautrix";
     repo = "telegram";
     tag = "v${version}";
-    hash = "sha256-uR0vhp7ONyjwMKbgM1iObpFRoQzyQzJLbw4i9P58jTs=";
+    hash = "sha256-w3BqWyAJV/lZPoOFDzxhootpw451lYruwM9efwS6cEc=";
   };
 
   format = "setuptools";