diff --git a/dev-requirements.txt b/dev-requirements.txt
index d6c90fa..ce39d08 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -1,6 +1,6 @@
-coverage==4.0
-mock==1.3.0
+coverage==4.0.3
+mock==2.0.0
 nose==1.3.7
-testfixtures==4.2.0
+testfixtures==4.9.1
 -e git://github.com/alanhamlett/nose-capturestderr.git@9f60083b756478258fdc800b6507f50ca6fc657c#egg=nose-capturestderr
 -e git://github.com/alanhamlett/nose-exclude.git@f8ad6b1111e3927ecfaafd26f6952745c4b8df0c#egg=nose-exclude