diff --git a/build.gradle b/build.gradle
index e1900df..dbbd4e6 100644
--- a/build.gradle
+++ b/build.gradle
@@ -19,7 +19,7 @@ apply plugin: 'maven-publish'
 targetCompatibility = 1.6
 
 ncore {
-    coreVersion = '1.3.9.1'
+    coreVersion = project.properties.'biz.redsoft.ncore.version'
     sourceEncoding = 'UTF-8'
 }
 
diff --git a/gradle.properties b/gradle.properties
new file mode 100644
index 0000000..34c35a2
--- /dev/null
+++ b/gradle.properties
@@ -0,0 +1 @@
+biz.redsoft.ncore.version=1.3.17.0