diff --git a/src/main/python/nexusproto/setup.py b/src/main/python/nexusproto/setup.py
index 7a3250b..8314743 100644
--- a/src/main/python/nexusproto/setup.py
+++ b/src/main/python/nexusproto/setup.py
@@ -29,7 +29,7 @@
     platforms='any',
 
     install_requires=[
-        'protobuf==3.2.0'
+        'protobuf==3.18.3'
     ],
 
     classifiers=[