diff --git a/pkgs/development/python-modules/cdcs/default.nix b/pkgs/development/python-modules/cdcs/default.nix
index ec11019cc9a7..748d0ff623fd 100644
--- a/pkgs/development/python-modules/cdcs/default.nix
+++ b/pkgs/development/python-modules/cdcs/default.nix
@@ -9,7 +9,7 @@
 }:
 
 buildPythonPackage rec {
-  version = "0.1.6";
+  version = "0.1.8";
   pname = "cdcs";
   format = "setuptools";
 
@@ -19,7 +19,7 @@ buildPythonPackage rec {
     owner = "usnistgov";
     repo = "pycdcs";
     rev = "v${version}";
-    sha256 = "sha256-w9CBNOK9oXTIUa+SsnepRN0wAz7WPZGfUNDSbtVn1L8=";
+    sha256 = "sha256-s+COE7hus1J5I8PTdagl7KEK5QFoidjQ3ee46kOWmkE=";
   };
 
   propagatedBuildInputs = [