diff --git a/pkgs/development/python-modules/ecpy/default.nix b/pkgs/development/python-modules/ecpy/default.nix
index c6109d5c084d..153fcd08d25a 100644
--- a/pkgs/development/python-modules/ecpy/default.nix
+++ b/pkgs/development/python-modules/ecpy/default.nix
@@ -2,11 +2,11 @@
 
 buildPythonPackage rec {
   pname = "ECPy";
-  version = "0.10.0";
+  version = "1.2.3";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "8889122d3a8bc1a08b4bda42c073dd22305d770b7876356de806ff91748983bd";
+    sha256 = "6dd09f8cda5a1d673228ff9ef41aea8f036ee5ef3183198de83c14957d68c3e0";
   };
 
   propagatedBuildInputs = lib.optional (!isPy3k) future;