diff --git a/pkgs/development/python-modules/cypari2/default.nix b/pkgs/development/python-modules/cypari2/default.nix
index 6df19e4c94be..a77e98dae4c8 100644
--- a/pkgs/development/python-modules/cypari2/default.nix
+++ b/pkgs/development/python-modules/cypari2/default.nix
@@ -11,11 +11,12 @@
 
 buildPythonPackage rec {
   pname = "cypari2";
-  version = "1.2.1";
+  # upgrade may break sage, please test the sage build or ping @timokau on upgrade
+  version = "1.3.1";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0v2kikwf0advq8j76nwzhlacwj1yys9cvajm4fqgmasjdsnf1q4k";
+    sha256 = "04f00xp8aaz37v00iqg1mv5wjq00a5qhk8cqa93s13009s9x984r";
   };
 
   # This differs slightly from the default python installPhase in that it pip-installs