diff --git a/pydtn/communities/base.py b/pydtn/communities/base.py
index 69e6a9dd3ea1037e1c495783f5a5fc8ab77d5b47..39afcd84a79af979b3fce759c6ecdaf6b3a53a4b 100644
--- a/pydtn/communities/base.py
+++ b/pydtn/communities/base.py
@@ -1,4 +1,3 @@
-from collections import defaultdict
 from itertools import product
 
 import networkx as nx