diff --git a/nix/cbor2.nix b/nix/cbor2.nix
index 02c810e1e..1bd9920e6 100644
--- a/nix/cbor2.nix
+++ b/nix/cbor2.nix
@@ -4,7 +4,7 @@ buildPythonPackage rec {
   version = "5.2.0";
 
   src = fetchPypi {
-    sha256 = "1mmmncfbsx7cbdalcrsagp9hx7wqfawaz9361gjkmsk3lp6chd5w";
+    sha256 = "1gwlgjl70vlv35cgkcw3cg7b5qsmws36hs4mmh0l9msgagjs4fm3";
     inherit pname version;
   };
 
diff --git a/nix/klein.nix b/nix/klein.nix
index aa109e3d1..0bb025cf8 100644
--- a/nix/klein.nix
+++ b/nix/klein.nix
@@ -4,7 +4,7 @@ buildPythonPackage rec {
   version = "21.8.0";
 
   src = fetchPypi {
-    sha256 = "09i1x5ppan3kqsgclbz8xdnlvzvp3amijbmdzv0kik8p5l5zswxa";
+    sha256 = "1mpydmz90d0n9dwa7mr6pgj5v0kczfs05ykssrasdq368dssw7ch";
     inherit pname version;
   };