diff --git a/pkgs/development/python-modules/cysignals/default.nix b/pkgs/development/python-modules/cysignals/default.nix
index f9d7ba8a8513..c1f85ce75ac4 100644
--- a/pkgs/development/python-modules/cysignals/default.nix
+++ b/pkgs/development/python-modules/cysignals/default.nix
@@ -9,11 +9,11 @@ assert pariSupport -> pari != null;
 
 buildPythonPackage rec {
   pname = "cysignals";
-  version = "1.8.1";
+  version = "1.9.0";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1hnkcrrxgh6g8a197v2yw61xz43iyv81jbl6jpy19ql3k66w81zx";
+    sha256 = "15ix8crpad26cfl1skyg7qajqqfdrm8q5ahhmlfmqi1aw0jqj2g2";
   };
 
   # explicit check: