diff --git a/ajaximage/fields.py b/ajaximage/fields.py
index 2498a9a..bff37cc 100644
--- a/ajaximage/fields.py
+++ b/ajaximage/fields.py
@@ -31,7 +31,11 @@ def __init__(self, *args, **kwargs):
         super(AjaxImageField, self).__init__(*args, **kwargs)
 
     def contribute_to_class(self, cls, name, virtual_only=False):
-        super(AjaxImageField, self).contribute_to_class(cls, name, virtual_only)
+        # Django 1.4 hack, do not use virtual_only parameter with 1.4
+        if virtual_only:
+            super(AjaxImageField, self).contribute_to_class(cls, name, virtual_only)
+        else:
+            super(AjaxImageField, self).contribute_to_class(cls, name)
         setattr(cls, self.name, self.descriptor_class(self))
 
     def get_prep_value(self, value):
diff --git a/ajaximage/views.py b/ajaximage/views.py
index f9ea9ad..e513187 100644
--- a/ajaximage/views.py
+++ b/ajaximage/views.py
@@ -4,12 +4,15 @@
 from django.contrib.auth.decorators import user_passes_test
 from django.core.files.storage import default_storage
 from django.http import HttpResponse
-from django.utils.text import slugify
-from django.views.decorators.csrf import csrf_exempt
 from django.views.decorators.http import require_POST
 from .image import resize
 from .forms import FileForm
 
+try:
+    from django.utils.text import slugify
+except:
+    #Django 1.4 support
+    from django.template.defaultfilters import slugify
 
 UPLOAD_PATH = getattr(settings, 'AJAXIMAGE_DIR', 'ajaximage/')
 AUTH_TEST = getattr(settings, 'AJAXIMAGE_AUTH_TEST', lambda u: u.is_staff)
diff --git a/ajaximage/widgets.py b/ajaximage/widgets.py
index ef7158b..c88c27a 100644
--- a/ajaximage/widgets.py
+++ b/ajaximage/widgets.py
@@ -1,6 +1,6 @@
 import os
 from django.forms import widgets
-from django.utils.safestring import mark_safe
+from django.utils.safestring import mark_safe, SafeUnicode
 from django.core.urlresolvers import reverse
 from django.core.files.storage import default_storage
 
@@ -60,11 +60,11 @@ def render(self, name, value, attrs=None):
 
         file_name = os.path.basename(file_url)
 
-        output = self.html.format(upload_url=upload_url,
+        output = SafeUnicode(self.html.format(upload_url=upload_url,
                              file_url=file_url,
                              file_name=file_name,
                              file_path=file_path,
                              element_id=element_id,
-                             name=name)
+                             name=name))
 
         return mark_safe(output)