diff --git a/.travis.yml b/.travis.yml
index 065f23805..29f9f0065 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -23,6 +23,8 @@ matrix:
       env: TOXENV=py36
     - python: 3.6
       env: TOXENV=docs
+    - python: 3.7-dev
+      env: TOXENV=py37
 install:
   - |
       if [ "$TOXENV" = "pypy" ]; then
diff --git a/requirements-py3.txt b/requirements-py3.txt
index d76d9412f..b941fd867 100644
--- a/requirements-py3.txt
+++ b/requirements-py3.txt
@@ -1,4 +1,4 @@
-Twisted >= 17.9.0
+git+https://github.com/lopuhin/twisted.git@9384-remove-async-param
 lxml>=3.2.4
 pyOpenSSL>=0.13.1
 cssselect>=0.9
diff --git a/tox.ini b/tox.ini
index ee40983de..e5543fe2a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -81,6 +81,10 @@ deps = {[testenv:py34]deps}
 basepython = python3.6
 deps = {[testenv:py34]deps}
 
+[testenv:py37]
+basepython = python3.7
+deps = {[testenv:py34]deps}
+
 [testenv:pypy3]
 basepython = pypy3
 deps = {[testenv:py34]deps}