diff --git a/pkgs/servers/mqtt/mosquitto/default.nix b/pkgs/servers/mqtt/mosquitto/default.nix
index 11d5b92071be..04daa2f4a855 100644
--- a/pkgs/servers/mqtt/mosquitto/default.nix
+++ b/pkgs/servers/mqtt/mosquitto/default.nix
@@ -4,13 +4,13 @@
 
 stdenv.mkDerivation rec {
   name = "mosquitto-${version}";
-  version = "1.6.2";
+  version = "1.6.3";
 
   src = fetchFromGitHub {
     owner  = "eclipse";
     repo   = "mosquitto";
     rev    = "v${version}";
-    sha256 = "1n0rr4564a80b1km72myqa8qx4ak2jk55irx7d1vlgihgp88j3wm";
+    sha256 = "1xvfcqi6pa5pdnqd88gz9qx6kl2q47xp7l3q5wwgj0l9y9mlxp99";
   };
 
   postPatch = ''