diff --git a/build.gradle b/build.gradle
index 72cc44d..1d1f6b5 100644
--- a/build.gradle
+++ b/build.gradle
@@ -18,8 +18,7 @@ apply plugin: 'maven-publish'
 targetCompatibility = 1.6
 
 ncore {
-    coreVersion = '1.2.18.1'
-    coreJarsigned = true
+    coreVersion = '1.3.6.1'
     sourceEncoding = 'UTF-8'
 }