diff --git a/.travis.yml b/.travis.yml
index 51e2255..4c63c98 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,7 @@
 language: python
 python:
   - "2.7"
+install:
+  - tox
 script:
   - tox
diff --git a/jsonschema/_version.py b/jsonschema/_version.py
index 1ba07cc..09485ee 100644
--- a/jsonschema/_version.py
+++ b/jsonschema/_version.py
@@ -1,5 +1,5 @@
 
 # This file is automatically generated by setup.py.
-__version__ = '2.3.0.post133'
-__sha__ = 'g8ebd5bc'
-__revision__ = 'g8ebd5bc'
+__version__ = '2.3.0.post139'
+__sha__ = 'g60fcbbf'
+__revision__ = 'g60fcbbf'
diff --git a/version.txt b/version.txt
index bab441e..d3b1894 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-v2.3.0-133-g8ebd5bc
\ No newline at end of file
+v2.3.0-139-g60fcbbf
\ No newline at end of file