diff --git a/pkgs/applications/graphics/hydrus/default.nix b/pkgs/applications/graphics/hydrus/default.nix
index 1792c6355862..89e2d8c20817 100644
--- a/pkgs/applications/graphics/hydrus/default.nix
+++ b/pkgs/applications/graphics/hydrus/default.nix
@@ -12,14 +12,14 @@
 
 python3Packages.buildPythonPackage rec {
   pname = "hydrus";
-  version = "557";
+  version = "559";
   format = "other";
 
   src = fetchFromGitHub {
     owner = "hydrusnetwork";
     repo = "hydrus";
     rev = "refs/tags/v${version}";
-    hash = "sha256-upijLCj+mxTQ9EO2mfvnfPjqIvRaAqtByeRY/N1ANlU=";
+    hash = "sha256-+aYrqt1sifCe6/qS4kZyx0CLSHEoutFk6cyxmOXmN7Q=";
   };
 
   nativeBuildInputs = [
diff --git a/pkgs/development/python-modules/psd-tools/default.nix b/pkgs/development/python-modules/psd-tools/default.nix
index efc6aa6d742c..efa364a09de0 100644
--- a/pkgs/development/python-modules/psd-tools/default.nix
+++ b/pkgs/development/python-modules/psd-tools/default.nix
@@ -2,9 +2,12 @@
 , buildPythonPackage
 , fetchFromGitHub
 , pythonOlder
+, attrs
 , docopt
 , pillow
 , scikit-image
+, scipy
+, numpy
 , aggdraw
 , pytestCheckHook
 , ipython
@@ -31,10 +34,13 @@ buildPythonPackage rec {
 
   propagatedBuildInputs = [
     aggdraw
+    attrs
     docopt
     ipython
+    numpy
     pillow
     scikit-image
+    scipy
   ];
 
   nativeCheckInputs = [