diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index e483cd45b820..552384500d18 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -3464,6 +3464,17 @@ self: super: with self; {
 
   cython_0 = callPackage ../development/python-modules/cython/0.nix { };
 
+  cython_3_1 = self.cython.overrideAttrs rec {
+    version = "3.1.8";
+
+    src = pkgs.fetchFromGitHub {
+      owner = "cython";
+      repo = "cython";
+      tag = version;
+      hash = "sha256-U/vxKpLT4BvjpIfwvZTJ93oiZJT7fvh+doz51KPRGAs=";
+    };
+  };
+
   cytoolz = callPackage ../development/python-modules/cytoolz { };
 
   cyvest = callPackage ../development/python-modules/cyvest { };