diff --git a/.travis.yml b/.travis.yml
index abbd936..f63bdb6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -22,10 +22,8 @@ matrix:
   - python: 3.6
     env: TOXENV=flake8
 install: 
-  - if [[ $TRAVIS_PYTHON_VERSION == 3.3 ]]; then pip install virtualenv==15.2.0 tox==3.1.3; fi
+  - if [[ $TRAVIS_PYTHON_VERSION == 3.3 ]]; then pip install virtualenv==15.2.0 tox==2.9.1; fi
   - pip install tox
 script: tox
 notifications:
-  email: false
-  slack:
-    secure: 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
+  email: false
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
index ac02bfc..9264137 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -40,6 +40,6 @@ tox==2.7.0
 tqdm==4.14.0
 traitlets==4.3.2
 twine==1.9.1
-urllib3==1.23
+urllib3==1.24.2
 virtualenv==15.1.0
 wcwidth==0.1.7