diff --git a/bottle_mongo.py b/bottle_mongo.py
index 73e2551..84548ad 100644
--- a/bottle_mongo.py
+++ b/bottle_mongo.py
@@ -157,7 +157,7 @@ def setup(self, app):
 
     def apply(self, callback, context):
         """Return a decorated route callback."""
-        args = inspect.getargspec(context.callback)[0]
+        args = inspect.getfullargspec(context.callback)[0]
         # Skip this callback if we don't need to do anything
         if self.keyword not in args:
             return callback