diff --git a/server/requirements.txt b/server/requirements.txt
index 5cf2b18..16ea608 100644
--- a/server/requirements.txt
+++ b/server/requirements.txt
@@ -32,7 +32,7 @@ kappa==0.6.0
 lambda-packages==0.20.0
 MarkupSafe==1.1.1
 placebo==0.9.0
-protobuf==3.9.1
+protobuf==3.18.3
 pycparser==2.19
 PyHamcrest==1.9.0
 PyJWT==1.7.1