diff --git a/graphs/johnson_graph.py b/graphs/johnson_graph.py
index 998f71202..af9ed6c76 100644
--- a/graphs/johnson_graph.py
+++ b/graphs/johnson_graph.py
@@ -2,7 +2,6 @@ import heapq
 import sys
 
 
-
 # First implementation of johnson algorithm
 # Steps followed to implement this algorithm is given in the below link:
 # https://brilliant.org/wiki/johnsons-algorithm/