diff --git a/pkgs/development/python-modules/pyro4/default.nix b/pkgs/development/python-modules/pyro4/default.nix
index 8851b0464146..ac4848e63404 100644
--- a/pkgs/development/python-modules/pyro4/default.nix
+++ b/pkgs/development/python-modules/pyro4/default.nix
@@ -14,11 +14,11 @@
 
 buildPythonPackage rec {
   pname = "Pyro4";
-  version = "4.75";
+  version = "4.77";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1dfpp36imddx19yv0kd28gk1l71ckhpqy6jd590wpm2680jw15rq";
+    sha256 = "2bfe12a22f396474b0e57c898c7e2c561a8f850bf2055d8cf0f7119f0c7a523f";
   };
 
   propagatedBuildInputs = [