diff --git a/jsignature/fields.py b/jsignature/fields.py
index 4f1eb0e..0eba34d 100644
--- a/jsignature/fields.py
+++ b/jsignature/fields.py
@@ -48,6 +48,8 @@ class JSignatureField(models.Field):
         defaults.update(kwargs)
         return super(JSignatureField, self).formfield(**defaults)
 
-
-from south.modelsinspector import add_introspection_rules
-add_introspection_rules([], ["jsignature.fields.JSignatureField"])
+try:
+    from south.modelsinspector import add_introspection_rules
+    add_introspection_rules([], ["jsignature.fields.JSignatureField"])
+except ImportError:
+    pass
diff --git a/requirements.txt b/requirements.txt
index 9990ae9..1d189fb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,2 @@
-south
 pillow
 pyquery
\ No newline at end of file