diff --git a/build.gradle b/build.gradle
index 93020b6..d6ef806 100644
--- a/build.gradle
+++ b/build.gradle
@@ -3,13 +3,13 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.google.protobuf:protobuf-gradle-plugin:0.8.6'
+        classpath 'com.google.protobuf:protobuf-gradle-plugin:0.8.8'
     }
 }
 
 plugins {
     id 'java'
-    id 'com.google.protobuf' version '0.8.6'
+    id 'com.google.protobuf' version '0.8.8'
 }
 
 group 'org.bdchain'
@@ -17,8 +17,8 @@ version '1.0-SNAPSHOT'
 
 sourceCompatibility = 1.8
 
-def grpc_java_version = '1.15.0'
-def junit_version = '5.3.1'
+def grpc_java_version = '1.20.0'
+def junit_version = '5.4.1'
 
 tasks.withType(JavaCompile) {
     options.encoding = "UTF-8"
@@ -43,7 +43,7 @@ javadoc {
 
 protobuf {
     protoc {
-        artifact = "com.google.protobuf:protoc:3.6.0"
+        artifact = "com.google.protobuf:protoc:3.7.1"
     }
     plugins {
         grpc {