build: update dependencies

1 files changed, 3 insertions, 3 deletions

diff --git a/tox.ini b/tox.ini
index 24e32676..2e952f21 100644
--- a/tox.ini
+++ b/tox.ini
@@ -18,9 +18,9 @@ deps =
     -r requirements/pip.pip
     -r requirements/pytest.pip
     # gevent 1.3 causes a failure: https://github.com/nedbat/coveragepy/issues/663
-    py{36}: gevent==1.2.2
-    py{36,37,38}: eventlet==0.25.1
-    py{36,37,38}: greenlet==0.4.15
+    py{36,37,38,39}: gevent==21.1.2
+    py{36,37,38}: eventlet==0.31.0
+    py{36,37,38,39}: greenlet==1.1.0
 
 # Windows can't update the pip version with pip running, so use Python
 # to install things.