diff --git a/build.gradle.kts b/build.gradle.kts
index 1bce0247fdb..2988b572a89 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -124,6 +124,7 @@ extra["versions.ant"] = "1.8.2"
 extra["versions.android"] = "2.3.1"
 extra["versions.kotlinx-coroutines-core"] = "0.14.1"
 extra["versions.kotlinx-coroutines-jdk8"] = "0.14.1"
+extra["versions.json"] = "20160807"
 
 // the former "ideaSdk/core" dir contents without intellij-core.jar
 extra["IntellijCoreDependencies"] =