diff --git a/plinth/hashers.py b/plinth/hashers.py
new file mode 100644
index 000000000..6f1fdde6f
--- /dev/null
+++ b/plinth/hashers.py
@@ -0,0 +1,34 @@
+# SPDX-License-Identifier: AGPL-3.0-or-later
+"""
+Custom password hashers suitable for home servers.
+"""
+
+from django.contrib.auth.hashers import Argon2PasswordHasher
+
+
+class Argon2PasswordHasherLowMemory(Argon2PasswordHasher):
+    """Argon2 password hasher that uses less CPU and RAM than Django's default.
+
+    Derive from and override the default complexity parameters for Django. In
+    Django 2.2, the defaults are time: 2, memory: 512 and parallelism: 2. In
+    Django 3.2, the defaults are time: 2, memory: 102400, parallelism: 8. This
+    takes more than 3 seconds per verification on a Lime2 board.
+
+    On a Pioneer Edition, Olimex Lime2 board, the selected parameters result in
+    about 200ms for password verification:
+
+    $ python3 -m argon2 -p 2 -m 4096
+    Running Argon2id 100 times with:
+    hash_len: 16 bytes
+    memory_cost: 4096 KiB
+    parallelism: 2 threads
+    time_cost: 2 iterations
+
+    Measuring...
+
+    2.17e+02ms per password verification
+
+    """
+    time_cost = 2  # Iterations
+    memory_cost = 4096  # KiB
+    parallelism = 2  # Threads
diff --git a/plinth/settings.py b/plinth/settings.py
index 5845c3dd3..6213d74a7 100644
--- a/plinth/settings.py
+++ b/plinth/settings.py
@@ -131,7 +131,7 @@ MIDDLEWARE = (
 )
 
 PASSWORD_HASHERS = [
-    'django.contrib.auth.hashers.Argon2PasswordHasher',
+    'plinth.hashers.Argon2PasswordHasherLowMemory',
     'django.contrib.auth.hashers.PBKDF2PasswordHasher',
     'django.contrib.auth.hashers.PBKDF2SHA1PasswordHasher',
     'django.contrib.auth.hashers.BCryptSHA256PasswordHasher',