diff --git a/pkgs/development/python-modules/opentimestamps/default.nix b/pkgs/development/python-modules/opentimestamps/default.nix
index 1271a46f047..370378f097a 100644
--- a/pkgs/development/python-modules/opentimestamps/default.nix
+++ b/pkgs/development/python-modules/opentimestamps/default.nix
@@ -2,15 +2,17 @@
 , bitcoinlib, GitPython, pysha3 }:
 
 buildPythonPackage rec {
-  name = "opentimestamps-${version}";
-  version = "0.2.1";
+  pname = "opentimestamps";
+  version = "0.3.0";
   disabled = (!isPy3k);
 
+  # We can't use the pypi source because it doesn't include README.md which is
+  # needed in setup.py
   src = fetchFromGitHub {
     owner = "opentimestamps";
     repo = "python-opentimestamps";
-    rev = "python-opentimestamps-v0.2.1";
-    sha256 = "1cilv1ls9mdqk8zriqfkz7xcl8i1ncm0f89n4c8k4s82kf5y56rm";
+    rev = "python-opentimestamps-v${version}";
+    sha256 = "1i843mbz4h9vqc3y2x09ix6bv9wc0gzq36zhbnmf5by08iaiydks";
   };
 
   # Remove a failing test which expects the test source file to reside in the