diff --git a/django/contrib/auth/hashers.py b/django/contrib/auth/hashers.py
index 34caa4eba9..dac1ceacf6 100644
--- a/django/contrib/auth/hashers.py
+++ b/django/contrib/auth/hashers.py
@@ -235,7 +235,7 @@ class PBKDF2PasswordHasher(BasePasswordHasher):
     safely but you must rename the algorithm if you change SHA256.
     """
     algorithm = "pbkdf2_sha256"
-    iterations = 180000
+    iterations = 216000
     digest = hashlib.sha256
 
     def encode(self, password, salt, iterations=None):
diff --git a/docs/releases/3.1.txt b/docs/releases/3.1.txt
index 9b16bae9ca..cafd8dbdb0 100644
--- a/docs/releases/3.1.txt
+++ b/docs/releases/3.1.txt
@@ -43,7 +43,8 @@ Minor features
 :mod:`django.contrib.auth`
 ~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-* ...
+* The default iteration count for the PBKDF2 password hasher is increased from
+  180,000 to 216,000.
 
 :mod:`django.contrib.contenttypes`
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
diff --git a/tests/auth_tests/test_hashers.py b/tests/auth_tests/test_hashers.py
index ad62101d8c..5efc179f59 100644
--- a/tests/auth_tests/test_hashers.py
+++ b/tests/auth_tests/test_hashers.py
@@ -52,7 +52,7 @@ class TestUtilsHashPass(SimpleTestCase):
 
     def test_pbkdf2(self):
         encoded = make_password('lètmein', 'seasalt', 'pbkdf2_sha256')
-        self.assertEqual(encoded, 'pbkdf2_sha256$180000$seasalt$gH56uAM9k5UGHuCzAYqLtJQ7AFgnXEZ4LMzt71ldHoc=')
+        self.assertEqual(encoded, 'pbkdf2_sha256$216000$seasalt$youGZxOw6ZOcfrXv2i8/AhrnpZflJJ9EshS9XmUJTUg=')
         self.assertTrue(is_password_usable(encoded))
         self.assertTrue(check_password('lètmein', encoded))
         self.assertFalse(check_password('lètmeinz', encoded))
@@ -285,13 +285,13 @@ class TestUtilsHashPass(SimpleTestCase):
     def test_low_level_pbkdf2(self):
         hasher = PBKDF2PasswordHasher()
         encoded = hasher.encode('lètmein', 'seasalt2')
-        self.assertEqual(encoded, 'pbkdf2_sha256$180000$seasalt2$42TW7RGTT6FJUY+hv/VNLy7/3F0KbOcvoKmvB6TAnGU=')
+        self.assertEqual(encoded, 'pbkdf2_sha256$216000$seasalt2$gHyszNJ9lwTG5y3MQUjZe+OJmYVTBPl/y7bYq9dtk8M=')
         self.assertTrue(hasher.verify('lètmein', encoded))
 
     def test_low_level_pbkdf2_sha1(self):
         hasher = PBKDF2SHA1PasswordHasher()
         encoded = hasher.encode('lètmein', 'seasalt2')
-        self.assertEqual(encoded, 'pbkdf2_sha1$180000$seasalt2$y3RFPd5ZY+yJ8pv4soGPYtg2tZo=')
+        self.assertEqual(encoded, 'pbkdf2_sha1$216000$seasalt2$E1KH89wMKuPXrrQzifVcG4cBtiA=')
         self.assertTrue(hasher.verify('lètmein', encoded))
 
     @override_settings(