diff --git a/requirements.txt b/requirements.txt
index 392de7d885..cfa9cfdbfe 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,5 @@
 packaging
+numpy
 torch>=1.7.1
 torchmetrics<=0.5.0
 pytorch-lightning>=1.4.0