diff --git a/pkgs/tools/misc/tmuxp/default.nix b/pkgs/tools/misc/tmuxp/default.nix
index 1d1eaa53e7bb..b61f0bddaa26 100644
--- a/pkgs/tools/misc/tmuxp/default.nix
+++ b/pkgs/tools/misc/tmuxp/default.nix
@@ -2,12 +2,12 @@
 
 python3Packages.buildPythonApplication rec {
   pname = "tmuxp";
-  version = "1.34.0";
-  format = "pyproject";
+  version = "1.39.0";
+  pyproject = true;
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-G93YtgXo4li+tLWKgJFaxx4Ax4sK4F+vK6M3WTXIeiU=";
+    hash = "sha256-E8Q1uCV3kl4rYg/bzwjk3CNQU/uP9lEZzSqcOFkLrY0=";
   };
 
   nativeBuildInputs = [