diff --git a/requirements-test.txt b/requirements-test.txt
index c716b2f..f030ce8 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -1,7 +1,4 @@
 coverage==4.5.1
-py<1.6.0
 pytest==3.0.7
 pytest-cov==2.5.1
-tox==2.9.1
-virtualenv==15.0.2
-tox-virtualenv-no-download==1.0.2
+tox<3.0
diff --git a/tox.ini b/tox.ini
index a70437d..1392927 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py26,py27,py34,py37,pypy
+envlist = py27,py34,py37,py39,pypy
 [testenv]
 changedir = .tox
 deps = -rrequirements-test.txt