diff --git a/taggit/models.py b/taggit/models.py
index 76c8bafe..d4810319 100644
--- a/taggit/models.py
+++ b/taggit/models.py
@@ -157,7 +157,7 @@ def tags_for(cls, model, instance=None, **extra_filters):
 
 
 class GenericTaggedItemBase(CommonGenericTaggedItemBase):
-    object_id = models.IntegerField(verbose_name=_("object ID"), db_index=True)
+    object_id = models.BigIntegerField(verbose_name=_("object ID"), db_index=True)
 
     class Meta:
         abstract = True