diff --git a/textanalyser/requirements.txt b/textanalyser/requirements.txt
index 5d3c22d..80c89c6 100644
--- a/textanalyser/requirements.txt
+++ b/textanalyser/requirements.txt
@@ -106,7 +106,7 @@ ply==3.11
 pocketsphinx==0.1.3
 portend==2.3
 prettytable==0.7.2
-protobuf==3.0.0
+protobuf==3.15.0
 py==1.5.4
 pyasn1==0.4.3
 PyAutoGUI==0.9.38