diff --git a/build.gradle b/build.gradle
index e6483db..9694117 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,3 +1,4 @@
+// Copyright 2000-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 apply plugin: 'java'
 
 compileJava {
@@ -12,8 +13,8 @@ sourceSets {
 
 repositories { jcenter() }
 dependencies {
-  testCompile 'junit:junit:4.+'
-  testCompile 'org.assertj:assertj-core:3.+'
+  testCompile 'junit:junit:4.12'
+  testCompile 'org.assertj:assertj-core:3.12.2'
 }
 
 jar {