diff --git a/pkgs/development/python-modules/pygraphviz/default.nix b/pkgs/development/python-modules/pygraphviz/default.nix
index 1a084f8a8707..3a451f4af1e4 100644
--- a/pkgs/development/python-modules/pygraphviz/default.nix
+++ b/pkgs/development/python-modules/pygraphviz/default.nix
@@ -3,11 +3,11 @@
 
 buildPythonPackage rec {
   pname = "pygraphviz";
-  version = "1.5";
+  version = "1.6";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "179i3mjprhn200gcj6jq7c4mdrzckyqlh1srz78hynnw0nijka2h";
+    sha256 = "411ae84a5bc313e3e1523a1cace59159f512336318a510573b47f824edef8860";
     extension = "zip";
   };