diff --git a/pkgs/development/libraries/paho-mqtt-c/default.nix b/pkgs/development/libraries/paho-mqtt-c/default.nix
index 37a829088d81..836f9fe625df 100644
--- a/pkgs/development/libraries/paho-mqtt-c/default.nix
+++ b/pkgs/development/libraries/paho-mqtt-c/default.nix
@@ -2,13 +2,13 @@
 
 stdenv.mkDerivation rec {
   pname = "paho.mqtt.c";
-  version = "1.3.11";
+  version = "1.3.12";
 
   src = fetchFromGitHub {
     owner = "eclipse";
     repo = "paho.mqtt.c";
     rev = "v${version}";
-    hash = "sha256-TGCWA9tOOx0rCb/XQWqLFbXb9gOyGS8u6o9fvSRS6xI=";
+    hash = "sha256-LxyMbMA6Antt8Uu4jCvmvYT9+Vm4ZUVz4XXFdd0O7Kk=";
   };
 
   postPatch = ''