diff --git a/docs/changelog/1519.bugfix.rst b/docs/changelog/1519.bugfix.rst
new file mode 100644
index 000000000..5817382e7
--- /dev/null
+++ b/docs/changelog/1519.bugfix.rst
@@ -0,0 +1,2 @@
+Bump minimal six version needed to avoid using one incompatible with newer
+virtualenv. - by :user:`ssbarnea`
diff --git a/setup.cfg b/setup.cfg
index 9977fc839..5f0efae2b 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -43,7 +43,7 @@ install_requires =
     packaging >= 14
     pluggy >= 0.12.0, <1
     py >= 1.4.17, <2
-    six >= 1.0.0, <2
+    six >= 1.14.0, <2  # required when virtualenv>=20
     virtualenv >= 16.0.0
     toml >=0.9.4
     filelock >= 3.0.0, <4