diff --git a/changelog/4770.bugfix.rst b/changelog/4770.bugfix.rst
new file mode 100644
index 000000000..8fbb99e1b
--- /dev/null
+++ b/changelog/4770.bugfix.rst
@@ -0,0 +1 @@
+``more_itertools`` is now constrained to <6.0.0 when required for Python 2.7 compatibility.