diff --git a/django/db/backends/mysql/base.py b/django/db/backends/mysql/base.py
index 6612e10979..4f7abf5bef 100644
--- a/django/db/backends/mysql/base.py
+++ b/django/db/backends/mysql/base.py
@@ -32,8 +32,8 @@ from .schema import DatabaseSchemaEditor                    # isort:skip
 from .validation import DatabaseValidation                  # isort:skip
 
 version = Database.version_info
-if version < (1, 3, 3):
-    raise ImproperlyConfigured("mysqlclient 1.3.3 or newer is required; you have %s" % Database.__version__)
+if version < (1, 3, 7):
+    raise ImproperlyConfigured('mysqlclient 1.3.7 or newer is required; you have %s.' % Database.__version__)
 
 
 # MySQLdb returns TIME columns as timedelta -- they are more like timedelta in
diff --git a/docs/releases/2.1.txt b/docs/releases/2.1.txt
index bf69a59762..b48804ab97 100644
--- a/docs/releases/2.1.txt
+++ b/docs/releases/2.1.txt
@@ -229,7 +229,8 @@ supports PostgreSQL 9.4 and higher.
 Miscellaneous
 -------------
 
-* ...
+* The minimum supported version of ``mysqlclient`` is increased from 1.3.3 to
+  1.3.7.
 
 .. _deprecated-features-2.1: