diff --git a/requirements.txt b/requirements.txt
index 811b16b..38881df 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,8 +1,17 @@
-attrs==16.3.0
-beautifulsoup4==4.4.1
-html5lib==0.999
+attrs==17.2.0
+beautifulsoup4==4.6.0
+certifi==2017.7.27.1
+chardet==3.0.4
+flake8==3.3.0
+html5lib==0.999999999
+idna==2.6
+mccabe==0.6.1
 olefile==0.44
 Pillow==4.0.0
-requests==2.11.1
-requests-cache==0.4.12
-six==1.6.1
+pycodestyle==2.3.1
+pyflakes==1.5.0
+requests==2.18.4
+requests-cache==0.4.13
+six==1.10.0
+urllib3==1.22
+webencodings==0.5.1