Change http git repository url to ssh
diff --git a/pom.xml b/pom.xml
index b141219..69e5dc7 100644
--- a/pom.xml
+++ b/pom.xml
@@ -56,8 +56,8 @@
 
   <scm>
     <url>https://github.com/apache/tajo.git</url>
-    <connection>scm:git:https://github.com/apache/tajo.git</connection>
-    <developerConnection>scm:git:https://github.com/apache/tajo.git</developerConnection>
+    <connection>scm:git:git@github.com:apache/tajo.git</connection>
+    <developerConnection>scm:git:git@github.com:apache/tajo.git</developerConnection>
     <tag>HEAD</tag>
   </scm>