diff --git a/tox.ini b/tox.ini
index 4195139..0ab90fe 100644
--- a/tox.ini
+++ b/tox.ini
@@ -72,7 +72,7 @@ commands =
 [testenv:codecov]
 deps =
     coverage==4.2
-    codecov
+    codecov==2.0.15
 skip_install = true
 commands =
     coverage combine --append