diff --git a/IPython/nbformat/current.py b/IPython/nbformat/current.py
index 0df9f23..3de5463 100644
--- a/IPython/nbformat/current.py
+++ b/IPython/nbformat/current.py
@@ -29,7 +29,7 @@ from IPython.nbformat.v3 import (
     nbformat_minor,
 )
 
-import reader
+import .reader
 from .convert import convert
 
 #-----------------------------------------------------------------------------