diff --git a/requirements.txt b/requirements.txt
index 6f15ff2..a508af2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 cycler==0.10.0
 Jinja2==2.11.3
 MarkupSafe==1.0
-numpy==1.13.1
+numpy==1.21.0
 paho-mqtt==1.3.0
 pyparsing==2.2.0
 pyserial==3.4