diff --git a/setup.py b/setup.py
index a33a92c77..9d33f0a2a 100644
--- a/setup.py
+++ b/setup.py
@@ -21,6 +21,7 @@
 requirements = [
     "numpy>=1.13",
     "qiskit-terra>=0.13.0",
+    "networkx>=2.2",
     "scipy>=0.19,!=0.19.1",
     "setuptools>=40.1.0",
     "scikit-learn>=0.17",