--- a/build.gradle	Fri Feb 01 12:33:00 2019 +0900
+++ b/build.gradle	Fri Feb 01 19:26:51 2019 +0900
@@ -19,8 +19,8 @@
     //compile group: 'org.msgpack', name: 'msgpack-core', version: '0.8.16'
     //compile group: 'org.msgpack', name: 'jackson-dataformat-msgpack', version: '0.8.16'
     compile group: 'org.msgpack', name: 'msgpack', version: '0.6.12'
-
-
+    compile group: 'org.apache.logging.log4j', name: 'log4j-api', version: '2.11.1'
+    compile group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.11.1'
 }
 
 jar {
@@ -28,6 +28,7 @@
     manifest {
         attributes 'Implementation-Title': 'Gradle Quickstart', 'Implementation-Version': version
     }
+
     from configurations.compile.collect { it.isDirectory() ? it : zipTree(it) }
     archiveName = 'Christie.jar'
 }