diff --git a/requirements.txt b/requirements.txt
index e24bd48b..6eac31a4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,5 @@
 PyQt5==5.14.2
+numpy==1.19.3
 circleguard==5.0.2
 packaging>=17.0
 slider==0.3.1