diff --git a/pkgs/development/libraries/dlib/default.nix b/pkgs/development/libraries/dlib/default.nix
index d3e2f6c9c98..53ec9949f17 100644
--- a/pkgs/development/libraries/dlib/default.nix
+++ b/pkgs/development/libraries/dlib/default.nix
@@ -3,14 +3,14 @@
 }:
 
 stdenv.mkDerivation rec {
-  version = "19.10";
+  version = "19.9";
   name = "dlib-${version}";
 
   src = fetchFromGitHub {
     owner = "davisking";
     repo = "dlib";
     rev ="v${version}";
-    sha256 = "0sgxblf4n33b8wgblyblmrkwydvy1yh7fzll1b6c4zgkz675w0m5";
+    sha256 = "0lc54r928j9dg7f2wn25m887z24d31wrc14v2hn6aknp1z084lrc";
   };
 
   postPatch = ''
diff --git a/pkgs/development/python-modules/face_recognition/default.nix b/pkgs/development/python-modules/face_recognition/default.nix
index 3b9a2c15b6e..d1d8e8535a4 100644
--- a/pkgs/development/python-modules/face_recognition/default.nix
+++ b/pkgs/development/python-modules/face_recognition/default.nix
@@ -1,23 +1,23 @@
 { buildPythonPackage, fetchFromGitHub, pillow, click, dlib, numpy
-, face_recognition_models, scipy, stdenv, flake8, tox, pytest, glibcLocales
+, face_recognition_models, stdenv, flake8, tox, pytest, glibcLocales
 }:
 
 buildPythonPackage rec {
   pname = "face_recognition";
-  version = "1.2.1";
+  version = "1.2.2";
 
   src = fetchFromGitHub {
     repo = pname;
     owner = "ageitgey";
-    rev = "fe421d4acd76e8a19098e942b7bd9c3bbef6ebc4"; # no tags available in Git, pure revs are pushed to pypi
-    sha256 = "0wv5qxkg7xv1cr43zhhbixaqgj08xw2l7yvwl8g3fb2kdxyndw1c";
+    rev = "v${version}";
+    sha256 = "17jnyr80j1p74gyvh1jabvwd3zsxvip2y7cjhh2g6gsjv2dpvrjv";
   };
 
   postPatch = ''
     substituteInPlace setup.py --replace "flake8==2.6.0" "flake8"
   '';
 
-  propagatedBuildInputs = [ pillow click dlib numpy face_recognition_models scipy ];
+  propagatedBuildInputs = [ pillow click dlib numpy face_recognition_models ];
 
   checkInputs = [ flake8 tox pytest glibcLocales ];
   checkPhase = ''