diff --git a/CHANGELOG.md b/CHANGELOG.md
index 812679ee..b4f85614 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,7 +6,11 @@ and this project adheres to
 
 ## [Unreleased]
 
-## Fixed
+### Changed
+
+- ♻️(backend) increase user short_name field length
+
+### Fixed
 
 - 🐛(frontend) fix duplicate document entries in grid #1479
 - 🐛(frontend) show full nested doc names with ajustable bar #1456
diff --git a/src/backend/core/migrations/0025_alter_user_short_name.py b/src/backend/core/migrations/0025_alter_user_short_name.py
new file mode 100644
index 00000000..3ffc3116
--- /dev/null
+++ b/src/backend/core/migrations/0025_alter_user_short_name.py
@@ -0,0 +1,19 @@
+# Generated by Django 5.2.7 on 2025-10-22 06:12
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("core", "0024_add_is_masked_field_to_link_trace"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="user",
+            name="short_name",
+            field=models.CharField(
+                blank=True, max_length=100, null=True, verbose_name="short name"
+            ),
+        ),
+    ]
diff --git a/src/backend/core/models.py b/src/backend/core/models.py
index 941c72ec..6e0ad69e 100644
--- a/src/backend/core/models.py
+++ b/src/backend/core/models.py
@@ -148,7 +148,9 @@ class User(AbstractBaseUser, BaseModel, auth_models.PermissionsMixin):
     )
 
     full_name = models.CharField(_("full name"), max_length=100, null=True, blank=True)
-    short_name = models.CharField(_("short name"), max_length=20, null=True, blank=True)
+    short_name = models.CharField(
+        _("short name"), max_length=100, null=True, blank=True
+    )
 
     email = models.EmailField(_("identity email address"), blank=True, null=True)