diff --git a/gradle.properties b/gradle.properties
index 34ff1ec7..555ad16a 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,4 +1,5 @@
 org.gradle.jvmargs=-Djavax.xml.accessExternalSchema=all
 luceneVersion=8.2.0
 mongoDriverVersion=3.11.0
-grpcVersion=1.23.0
\ No newline at end of file
+grpcVersion=1.23.0
+protobufVersion=3.9.0
\ No newline at end of file
diff --git a/zulia-common/build.gradle.kts b/zulia-common/build.gradle.kts
index 78525b72..04a9d355 100644
--- a/zulia-common/build.gradle.kts
+++ b/zulia-common/build.gradle.kts
@@ -13,6 +13,7 @@ description = "Zulia Common"
 
 val grpcVersion: String by project
 val mongoDriverVersion: String by project
+val protobufVersion: String by project
 
 
 dependencies {
@@ -29,7 +30,7 @@ dependencies {
 protobuf {
 
     protoc {
-        artifact = "com.google.protobuf:protoc:3.7.1"
+        artifact = "com.google.protobuf:protoc:$protobufVersion"
     }
     plugins {
         id("grpc") {
diff --git a/zulia-server/build.gradle.kts b/zulia-server/build.gradle.kts
index 9343c739..102e3292 100644
--- a/zulia-server/build.gradle.kts
+++ b/zulia-server/build.gradle.kts
@@ -6,6 +6,7 @@ description = "Zulia Server"
 
 val luceneVersion: String by project
 val mongoDriverVersion: String by project
+val protobufVersion: String by project
 
 defaultTasks("build", "installDist")
 
@@ -27,7 +28,7 @@ dependencies {
     compile("javax.xml.bind:jaxb-api:2.3.0")
     compile("javax.annotation:javax.annotation-api:1.3.2")
 
-    compile("com.google.protobuf:protobuf-java-util:3.7.1")
+    compile("com.google.protobuf:protobuf-java-util:$protobufVersion")
 
     compile("com.cedarsoftware:json-io:4.10.1")