diff --git a/pi_requirements.txt b/pi_requirements.txt
index 7f4a57a..0fca8df 100644
--- a/pi_requirements.txt
+++ b/pi_requirements.txt
@@ -12,7 +12,7 @@ mock==3.0.5
 noise==1.2.2
 numpy==1.17.0
 pandas==0.25.0
-protobuf==3.9.1
+protobuf==3.18.3
 pyserial==3.4
 python-dateutil==2.8.0
 python-osc==1.7.2