diff --git a/requirements.txt b/requirements.txt
index 1e0e372..43aaa53 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,7 +20,7 @@ matplotlib==2.2.4
 numpy==1.15.4
 pandas==0.24.2
 Pillow==5.3.0
-protobuf==3.6.1
+protobuf==3.18.3
 pycrypto==2.6.1
 pydensecrf==1.0rc2
 pygobject==3.26.1