diff --git a/pkgs/development/python-modules/pycoin/default.nix b/pkgs/development/python-modules/pycoin/default.nix
index d42cfcadfee5..eb57096b9813 100644
--- a/pkgs/development/python-modules/pycoin/default.nix
+++ b/pkgs/development/python-modules/pycoin/default.nix
@@ -8,11 +8,11 @@
 
 buildPythonPackage rec {
   pname = "pycoin";
-  version = "0.90.20201031";
+  version = "0.91.20210515";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "65c19204cb7aece4aae30c44b5e08beecb9c118370a9f9994d6cddaee17c351d";
+    sha256 = "d2231a8d11b2524c26472d08cf1b76569849ab44507495d0510165ae0af4858e";
   };
 
   propagatedBuildInputs = [ setuptools ];