diff --git a/pom.xml b/pom.xml
index a33ea1d..4542371 100644
--- a/pom.xml
+++ b/pom.xml
@@ -17,7 +17,7 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <medirc.protocol.version>0.1-SNAPSHOT</medirc.protocol.version>
-        <protobuf.version>3.0.2</protobuf.version>
+        <protobuf.version>3.16.3</protobuf.version>
         <os-maven-plugin.version>1.6.2</os-maven-plugin.version>
         <maven-dependency-plugin.version>2.10</maven-dependency-plugin.version>
         <maven-antrun-plugin.version>1.8</maven-antrun-plugin.version>