diff --git a/Python-scripts/req_colfax.txt b/Python-scripts/req_colfax.txt
index db33da2..06e6f2b 100644
--- a/Python-scripts/req_colfax.txt
+++ b/Python-scripts/req_colfax.txt
@@ -12,7 +12,7 @@ olefile==0.44
 pandas==0.19.2
 pbr==1.10.0
 Pillow==8.2.0
-protobuf==3.2.0
+protobuf==3.18.3
 pycairo==1.10.0
 pydaal==2017.0.3.20170412
 pyparsing==2.1.4
diff --git a/Python-scripts/req_win_gpu.txt b/Python-scripts/req_win_gpu.txt
index 18c6328..18f9e40 100644
--- a/Python-scripts/req_win_gpu.txt
+++ b/Python-scripts/req_win_gpu.txt
@@ -15,7 +15,7 @@ olefile==0.44
 opencv-python==3.2.0.7
 pandas==0.20.2
 Pillow==8.2.0
-protobuf==3.3.0
+protobuf==3.18.3
 pydot==1.2.3
 pygpu==0.6.4
 pyparsing==2.2.0
diff --git a/Python-scripts/requirements.txt b/Python-scripts/requirements.txt
index 18c6328..18f9e40 100644
--- a/Python-scripts/requirements.txt
+++ b/Python-scripts/requirements.txt
@@ -15,7 +15,7 @@ olefile==0.44
 opencv-python==3.2.0.7
 pandas==0.20.2
 Pillow==8.2.0
-protobuf==3.3.0
+protobuf==3.18.3
 pydot==1.2.3
 pygpu==0.6.4
 pyparsing==2.2.0