diff --git a/snikket_web/invite.py b/snikket_web/invite.py
index 1207aed..13198a7 100644
--- a/snikket_web/invite.py
+++ b/snikket_web/invite.py
@@ -116,6 +116,10 @@ class RegisterForm(BaseForm):
 
     password = wtforms.PasswordField(
         _l("Password"),
+        validators=[
+            wtforms.validators.InputRequired(),
+            wtforms.validators.Length(min=10),
+        ],
     )
 
     password_confirm = wtforms.PasswordField(
@@ -184,6 +188,10 @@ async def register(id_: str) -> typing.Union[str, werkzeug.Response]:
 class ResetForm(BaseForm):
     password = wtforms.PasswordField(
         _l("Password"),
+        validators=[
+            wtforms.validators.InputRequired(),
+            wtforms.validators.Length(min=10),
+        ],
     )
 
     password_confirm = wtforms.PasswordField(
diff --git a/snikket_web/translations/messages.pot b/snikket_web/translations/messages.pot
index 97b9753..9c34933 100644
--- a/snikket_web/translations/messages.pot
+++ b/snikket_web/translations/messages.pot
@@ -23,7 +23,7 @@ msgid "Login name"
 msgstr ""
 
 #: snikket_web/admin.py:73 snikket_web/templates/admin_delete_user.html:12
-#: snikket_web/user.py:63
+#: snikket_web/user.py:69
 msgid "Display name"
 msgstr ""
 
@@ -280,56 +280,56 @@ msgstr ""
 msgid "Username"
 msgstr ""
 
-#: snikket_web/invite.py:118 snikket_web/invite.py:186 snikket_web/main.py:43
+#: snikket_web/invite.py:118 snikket_web/invite.py:190 snikket_web/main.py:43
 msgid "Password"
 msgstr ""
 
-#: snikket_web/invite.py:122 snikket_web/invite.py:190
+#: snikket_web/invite.py:126 snikket_web/invite.py:198
 msgid "Confirm password"
 msgstr ""
 
-#: snikket_web/invite.py:126 snikket_web/invite.py:194
+#: snikket_web/invite.py:130 snikket_web/invite.py:202
 msgid "The passwords must match."
 msgstr ""
 
-#: snikket_web/invite.py:131
+#: snikket_web/invite.py:135
 msgid "Create account"
 msgstr ""
 
-#: snikket_web/invite.py:158
+#: snikket_web/invite.py:162
 msgid "That username is already taken."
 msgstr ""
 
-#: snikket_web/invite.py:162 snikket_web/invite.py:227
+#: snikket_web/invite.py:166 snikket_web/invite.py:235
 msgid "Registration was declined for unknown reasons."
 msgstr ""
 
-#: snikket_web/invite.py:166
+#: snikket_web/invite.py:170
 msgid "The username is not valid."
 msgstr ""
 
-#: snikket_web/invite.py:199 snikket_web/templates/user_home.html:32
+#: snikket_web/invite.py:207 snikket_web/templates/user_home.html:32
 #: snikket_web/templates/user_passwd.html:29
 msgid "Change password"
 msgstr ""
 
-#: snikket_web/invite.py:246
+#: snikket_web/invite.py:254
 msgid "Account data file"
 msgstr ""
 
-#: snikket_web/invite.py:250
+#: snikket_web/invite.py:258
 msgid "Import data"
 msgstr ""
 
-#: snikket_web/invite.py:271
+#: snikket_web/invite.py:279
 #, python-format
 msgid ""
 "The account data you tried to import is in an unknown format. Please "
 "upload an XML file in XEP-0227 format (provided format: %(mimetype)s)."
 msgstr ""
 
-#: snikket_web/invite.py:291 snikket_web/templates/unauth.html:18
-#: snikket_web/user.py:178
+#: snikket_web/invite.py:299 snikket_web/templates/unauth.html:18
+#: snikket_web/user.py:184
 msgid "Error"
 msgstr ""
 
@@ -357,73 +357,73 @@ msgstr ""
 msgid "New password"
 msgstr ""
 
-#: snikket_web/user.py:39
+#: snikket_web/user.py:42
 msgid "Confirm new password"
 msgstr ""
 
-#: snikket_web/user.py:43
+#: snikket_web/user.py:47
 msgid "The new passwords must match."
 msgstr ""
 
-#: snikket_web/user.py:50
+#: snikket_web/user.py:56
 msgid "Sign out"
 msgstr ""
 
-#: snikket_web/user.py:55
+#: snikket_web/user.py:61
 msgid "Nobody"
 msgstr ""
 
-#: snikket_web/user.py:56
+#: snikket_web/user.py:62
 msgid "Friends only"
 msgstr ""
 
-#: snikket_web/user.py:57
+#: snikket_web/user.py:63
 msgid "Everyone"
 msgstr ""
 
-#: snikket_web/user.py:67
+#: snikket_web/user.py:73
 msgid "Avatar"
 msgstr ""
 
-#: snikket_web/user.py:71
+#: snikket_web/user.py:77
 msgid "Profile visibility"
 msgstr ""
 
-#: snikket_web/user.py:76
+#: snikket_web/user.py:82
 msgid "Update profile"
 msgstr ""
 
-#: snikket_web/user.py:82
+#: snikket_web/user.py:88
 msgid "Account data"
 msgstr ""
 
-#: snikket_web/user.py:86
+#: snikket_web/user.py:92
 msgid "Upload"
 msgstr ""
 
-#: snikket_web/user.py:111
+#: snikket_web/user.py:117
 msgid "Incorrect password."
 msgstr ""
 
-#: snikket_web/user.py:115
+#: snikket_web/user.py:121
 msgid "Password changed"
 msgstr ""
 
-#: snikket_web/user.py:123
+#: snikket_web/user.py:129
 msgid ""
 "The chosen avatar is too big. To be able to upload larger avatars, please"
 " use the app."
 msgstr ""
 
-#: snikket_web/user.py:170
+#: snikket_web/user.py:176
 msgid "Profile updated"
 msgstr ""
 
-#: snikket_web/user.py:184
+#: snikket_web/user.py:190
 msgid "Export"
 msgstr ""
 
-#: snikket_web/user.py:202
+#: snikket_web/user.py:208
 msgid "You currently have no account data to export."
 msgstr ""
 
diff --git a/snikket_web/user.py b/snikket_web/user.py
index 885f1b7..aecc1ba 100644
--- a/snikket_web/user.py
+++ b/snikket_web/user.py
@@ -32,16 +32,22 @@ class ChangePasswordForm(BaseForm):
 
     new_password = wtforms.PasswordField(
         _l("New password"),
-        validators=[wtforms.validators.InputRequired()]
+        validators=[
+            wtforms.validators.InputRequired(),
+            wtforms.validators.Length(min=10),
+        ]
     )
 
     new_password_confirm = wtforms.PasswordField(
         _l("Confirm new password"),
-        validators=[wtforms.validators.InputRequired(),
-                    wtforms.validators.EqualTo(
-                        "new_password",
-                        _l("The new passwords must match.")
-                    )]
+        validators=[
+            wtforms.validators.InputRequired(),
+            wtforms.validators.EqualTo(
+                "new_password",
+                _l("The new passwords must match.")
+            ),
+            wtforms.validators.Length(min=10),
+        ]
     )