diff --git a/Formula/twarc.rb b/Formula/twarc.rb
index 21ecf838d1..a4c92d8b76 100644
--- a/Formula/twarc.rb
+++ b/Formula/twarc.rb
@@ -5,6 +5,7 @@ class Twarc < Formula
   homepage "https://github.com/DocNow/twarc"
   url "https://github.com/DocNow/twarc/archive/v1.0.3.tar.gz"
   sha256 "9894a29f02c3fbbd671c9ee05db6fae3461ebbfcbba8f748421b8017c1f8fa96"
+  revision 1
 
   bottle do
     sha256 "7a21c9cb6b221ffecc4b6985a26227c93d69c92726cf90256e55c4dde7d22f64" => :sierra
@@ -12,7 +13,7 @@ class Twarc < Formula
     sha256 "001f4e79b8f0034f29eaa6b19a3a1e385cb10019de84db0ab96afd9bb046e18a" => :yosemite
   end
 
-  depends_on :python
+  depends_on :python if MacOS.version <= :snow_leopard
 
   resource "funcsigs" do
     url "https://files.pythonhosted.org/packages/94/4a/db842e7a0545de1cdb0439bb80e6e42dfe82aaeaadd4072f2263a4fbed23/funcsigs-1.0.2.tar.gz"
@@ -35,13 +36,13 @@ class Twarc < Formula
   end
 
   resource "py" do
-    url "https://files.pythonhosted.org/packages/f4/9a/8dfda23f36600dd701c6722316ba8a3ab4b990261f83e7d3ffc6dfedf7ef/py-1.4.31.tar.gz"
-    sha256 "a6501963c725fc2554dabfece8ae9a8fb5e149c0ac0a42fd2b02c5c1c57fc114"
+    url "https://files.pythonhosted.org/packages/93/bd/8a90834a287e0c1682eab8e20ada672e4f4cf7d5b99f2833ddbf31ed1a6d/py-1.4.32.tar.gz"
+    sha256 "c4b89fd1ff1162375115608d01f77c38cca1d0f28f37fd718005e19b28be41a7"
   end
 
   resource "pytest" do
-    url "https://files.pythonhosted.org/packages/2f/03/0c636d7191255e1737012e5f9c42368f11b55463aeea46fb1955892cab0d/pytest-3.0.4.tar.gz"
-    sha256 "879fee2c1fdbaacd1bf2c0047677c6dd4aee05b9c1e64330b34d130a584fa40d"
+    url "https://files.pythonhosted.org/packages/a8/87/b7ca49efe52d2b4169f2bfc49aa5e384173c4619ea8e635f123a0dac5b75/pytest-3.0.5.tar.gz"
+    sha256 "4a003aa956f023ce91aa6e166b555e6f02a4b0aeb459ac61e14f64c0d39037fd"
   end
 
   resource "python-dateutil" do
@@ -50,8 +51,8 @@ class Twarc < Formula
   end
 
   resource "requests" do
-    url "https://files.pythonhosted.org/packages/49/6f/183063f01aae1e025cf0130772b55848750a2f3a89bfa11b385b35d7329d/requests-2.10.0.tar.gz"
-    sha256 "63f1815788157130cee16a933b2ee184038e975f0017306d723ac326b5525b54"
+    url "https://files.pythonhosted.org/packages/5b/0b/34be574b1ec997247796e5d516f3a6b6509c4e064f2885a96ed885ce7579/requests-2.12.4.tar.gz"
+    sha256 "ed98431a0631e309bb4b63c81d561c1654822cb103de1ac7b47e45c26be7ae34"
   end
 
   resource "requests-oauthlib" do