diff --git a/apps/auth/forms.py b/apps/auth/forms.py
index 6977a3c2..e369a8f9 100644
--- a/apps/auth/forms.py
+++ b/apps/auth/forms.py
@@ -1,5 +1,4 @@
 from django import forms
-from django.contrib.auth.forms import AuthenticationForm
 
 
 class LearnerRegistrationForm(forms.Form):
@@ -7,9 +6,3 @@ class LearnerRegistrationForm(forms.Form):
     last_name = forms.CharField()
     email = forms.EmailField()
     password = forms.CharField()
-
-
-class AuthenticationForm(AuthenticationForm):
-
-    def clean_username(self):
-        return self.cleaned_data.get('username', '').lower()
diff --git a/apps/auth/views.py b/apps/auth/views.py
index acb7712d..379ab0a5 100644
--- a/apps/auth/views.py
+++ b/apps/auth/views.py
@@ -7,6 +7,7 @@ from facepy import GraphAPI
 from facepy.exceptions import FacepyError
 
 from django.contrib.auth import get_user_model, logout, login, views
+from django.contrib.auth.forms import AuthenticationForm
 from django.core.files.base import ContentFile
 from django.http import JsonResponse
 from django.urls import reverse_lazy
@@ -19,7 +20,7 @@ from django.shortcuts import redirect
 from apps.notification.utils import send_email
 from apps.config.models import Config
 
-from .forms import LearnerRegistrationForm, AuthenticationForm
+from .forms import LearnerRegistrationForm
 from .tokens import verification_email_token
 
 User = get_user_model()
@@ -171,7 +172,7 @@ class FacebookLoginOrRegistration(View):
             else:
                 email = email.lower()
                 try:
-                    user = User.objects.get(email=email)
+                    user = User.objects.get(email__iexact=email)
                 except User.DoesNotExist:
                     first_name = data.get('first_name', '')
                     last_name = data.get('last_name', '')