diff --git a/java/fixmarketsimulator/pom.xml b/java/fixmarketsimulator/pom.xml
index 9061888c..0b4babff 100644
--- a/java/fixmarketsimulator/pom.xml
+++ b/java/fixmarketsimulator/pom.xml
@@ -201,7 +201,7 @@
     <dependency>
       <groupId>com.google.protobuf</groupId>
       <artifactId>protobuf-java</artifactId>
-      <version>3.11.1</version>
+      <version>3.16.3</version>
     </dependency>
     <!-- https://mvnrepository.com/artifact/io.netty/netty-all -->
     <dependency>