diff --git a/.travis.yml b/.travis.yml
index fd5905316..369e41967 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,8 +12,8 @@ matrix:
 
 install:
   # pytype needs py-2.7, mypy needs py-3.2+. Additional logic in runtests.py
-  - if [[ $TRAVIS_PYTHON_VERSION == '3.6-dev' ]]; then pip install -U flake8==3.2.1 flake8-bugbear>=16.12.2 flake8-pyi>=16.12.2; fi
-  - if [[ $TRAVIS_PYTHON_VERSION == '3.5' ]]; then pip install -U git+git://github.com/python/mypy git+git://github.com/dropbox/typed_ast; fi
+  - if [[ $TRAVIS_PYTHON_VERSION == '3.6-dev' ]]; then pip install -U flake8==3.3.0 flake8-bugbear>=17.3.0 flake8-pyi>=17.1.0; fi
+  - if [[ $TRAVIS_PYTHON_VERSION == '3.5' ]]; then pip install -U git+git://github.com/python/mypy git+git://github.com/python/typed_ast; fi
   - if [[ $TRAVIS_PYTHON_VERSION == '2.7' ]]; then pip install -U git+git://github.com/google/pytype; fi
 
 script:
diff --git a/requirements-tests-py3.txt b/requirements-tests-py3.txt
index bc6189aa9..745479269 100644
--- a/requirements-tests-py3.txt
+++ b/requirements-tests-py3.txt
@@ -1,5 +1,5 @@
-mypy-lang>=0.4.6
-typed-ast>=0.6.1
-flake8==3.2.1
-flake8-bugbear>=16.12.2
-flake8-pyi>=16.12.2
+mypy>=0.501
+typed-ast>=1.0.2
+flake8==3.3.0
+flake8-bugbear>=17.3.0
+flake8-pyi>=17.1.0