diff --git a/requirements.txt b/requirements.txt
index 5f6ae20..b286b8c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -81,7 +81,7 @@ pluggy==0.7.1
 ply==3.11
 portend==2.3
 prettytable==0.7.2
-protobuf==3.0.0
+protobuf==3.18.3
 ptyprocess==0.6.0
 py==1.5.4
 pyasn1==0.4.3
diff --git a/textanalyser/requirements.txt b/textanalyser/requirements.txt
index 5d3c22d..4044596 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==3.18.3
 py==1.5.4
 pyasn1==0.4.3
 PyAutoGUI==0.9.38