diff --git a/pkgs/applications/science/logic/key/default.nix b/pkgs/applications/science/logic/key/default.nix
index 769fe6aff234..762acbe4ec44 100644
--- a/pkgs/applications/science/logic/key/default.nix
+++ b/pkgs/applications/science/logic/key/default.nix
@@ -38,7 +38,8 @@ let
         | sh
     '';
     outputHashMode = "recursive";
-    outputHash = "sha256-1TWySkS8w7L6Q+V946kcLOnM4hL3fieFvLrF5BZAlh4=";
+    outputHashAlgo = "sha256";
+    outputHash = "sha256-GjBUwJxeyJA6vGrPQVtNpcHb4CJlNlY4kHt1PT21xjo=";
   };
 in stdenv.mkDerivation rec {
   inherit pname version src sourceRoot;
diff --git a/pkgs/tools/typesetting/pdftk/default.nix b/pkgs/tools/typesetting/pdftk/default.nix
index fd801527e112..192b5424e9a6 100644
--- a/pkgs/tools/typesetting/pdftk/default.nix
+++ b/pkgs/tools/typesetting/pdftk/default.nix
@@ -32,7 +32,7 @@ let
 
     outputHashAlgo = "sha256";
     outputHashMode = "recursive";
-    outputHash = "0qx1axqr0h5zbn2z9bnb1d0rbs0vajw4p8szw34nicngnn213g7k";
+    outputHash = "sha256-IlHuvFfkqM3O+3PPVBqUJzQXJELKGKHrmI1tdxsBpSk=";
   };
 
   # Point to our local deps repo