diff --git a/CHANGELOG.md b/CHANGELOG.md
index c548af7..58e8065 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,13 +8,17 @@ and this project adheres to
 
 ## [Unreleased]
 
+### Changed
+
+- 🚸(oidc) ignore case when fallback on email #61
+
 ### Fixed
 
 - 🐛(oidc) use correct session key for token expiration check #56
 
 ## [0.0.23] - 2026-01-14
 
-### Changed
+
 
 - ⬆️(oidc) allow use mozilla-django-oidc >5.0.0 with PyJWT
 - ♻️(malware) reuse existing file_hash when rescheduling a task
diff --git a/src/lasuite/oidc_login/backends.py b/src/lasuite/oidc_login/backends.py
index ba1e4a1..2b4f38e 100644
--- a/src/lasuite/oidc_login/backends.py
+++ b/src/lasuite/oidc_login/backends.py
@@ -302,7 +302,7 @@ class OIDCAuthenticationBackend(MozillaOIDCAuthenticationBackend):
         except self.UserModel.DoesNotExist:
             if email and settings.OIDC_FALLBACK_TO_EMAIL_FOR_IDENTIFICATION:
                 try:
-                    return self.UserModel.objects.get(email=email)
+                    return self.UserModel.objects.get(email__iexact=email)
                 except self.UserModel.DoesNotExist:
                     pass
         return None
diff --git a/tests/oidc_login/test_backends.py b/tests/oidc_login/test_backends.py
index 6e7fab2..ebacd82 100644
--- a/tests/oidc_login/test_backends.py
+++ b/tests/oidc_login/test_backends.py
@@ -162,6 +162,25 @@ def test_authentication_getter_existing_user_via_email(django_assert_num_queries
     assert user == db_user
 
 
+def test_authentication_getter_existing_user_via_email_case(django_assert_num_queries, monkeypatch):
+    """
+    If an existing user doesn't match the sub but matches the email with different case,
+    the user should be returned.
+    """
+    klass = OIDCAuthenticationBackend()
+    db_user = factories.UserFactory(email="Some.User@example.com")
+
+    def get_userinfo_mocked(*args):
+        return {"sub": "123", "email": "sOmE.useR@example.com"}
+
+    monkeypatch.setattr(OIDCAuthenticationBackend, "get_userinfo", get_userinfo_mocked)
+
+    with django_assert_num_queries(3):  # user by email + user by sub + update sub
+        user = klass.get_or_create_user(access_token="test-token", id_token=None, payload=None)
+
+    assert user == db_user
+
+
 def test_authentication_getter_existing_user_no_fallback_to_email(settings, monkeypatch):
     """
     When the "OIDC_FALLBACK_TO_EMAIL_FOR_IDENTIFICATION" setting is set to False,