diff --git a/requirements.txt b/requirements.txt
index 3fb587f7a54b9cb19acdca3c1d19c5f06b3edd47..68fb1824fc5797e6ba02c2d1301838887d894480 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,4 +3,5 @@ networkx
 bidict
 pytest
 scipy
+numpy
 python-louvain