diff --git a/assembly/pom.xml b/assembly/pom.xml
index a1cbd82..1244121 100644
--- a/assembly/pom.xml
+++ b/assembly/pom.xml
@@ -26,7 +26,7 @@
     <parent>
         <artifactId>kylin</artifactId>
         <groupId>org.apache.kylin</groupId>
-        <version>2.6.3-SNAPSHOT</version>
+        <version>2.6.6</version>
     </parent>
 
     <properties>
diff --git a/cache/pom.xml b/cache/pom.xml
index a15b2d2..d80d78c 100644
--- a/cache/pom.xml
+++ b/cache/pom.xml
@@ -26,7 +26,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.6.3-SNAPSHOT</version>
+        <version>2.6.6</version>
     </parent>
 
     <dependencies>
diff --git a/core-common/pom.xml b/core-common/pom.xml
index 1647be8..3fe9c9e 100644
--- a/core-common/pom.xml
+++ b/core-common/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.6.3-SNAPSHOT</version>
+        <version>2.6.6</version>
     </parent>
 
     <dependencies>
diff --git a/core-cube/pom.xml b/core-cube/pom.xml
index 6a632b0..9d3af59 100644
--- a/core-cube/pom.xml
+++ b/core-cube/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.6.3-SNAPSHOT</version>
+        <version>2.6.6</version>
     </parent>
 
     <dependencies>
diff --git a/core-dictionary/pom.xml b/core-dictionary/pom.xml
index 5b79f46..aa318e2 100644
--- a/core-dictionary/pom.xml
+++ b/core-dictionary/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.6.3-SNAPSHOT</version>
+        <version>2.6.6</version>
     </parent>
 
     <dependencies>
diff --git a/core-job/pom.xml b/core-job/pom.xml
index dfbcdbc..97ccd75 100644
--- a/core-job/pom.xml
+++ b/core-job/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.6.3-SNAPSHOT</version>
+        <version>2.6.6</version>
     </parent>
 
     <dependencies>
diff --git a/core-metadata/pom.xml b/core-metadata/pom.xml
index bdf4048..da0378e 100644
--- a/core-metadata/pom.xml
+++ b/core-metadata/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.6.3-SNAPSHOT</version>
+        <version>2.6.6</version>
     </parent>
 
     <dependencies>
diff --git a/core-metrics/pom.xml b/core-metrics/pom.xml
index 7700308..f6d1fbf 100644
--- a/core-metrics/pom.xml
+++ b/core-metrics/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <artifactId>kylin</artifactId>
         <groupId>org.apache.kylin</groupId>
-        <version>2.6.3-SNAPSHOT</version>
+        <version>2.6.6</version>
     </parent>
 
     <dependencies>
diff --git a/core-storage/pom.xml b/core-storage/pom.xml
index 70595c4..de8d637 100644
--- a/core-storage/pom.xml
+++ b/core-storage/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.6.3-SNAPSHOT</version>
+        <version>2.6.6</version>
     </parent>
 
     <dependencies>
diff --git a/datasource-sdk/pom.xml b/datasource-sdk/pom.xml
index c9b950d..d2010cb 100644
--- a/datasource-sdk/pom.xml
+++ b/datasource-sdk/pom.xml
@@ -26,7 +26,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.6.3-SNAPSHOT</version>
+        <version>2.6.6</version>
     </parent>
 
     <dependencies>
diff --git a/engine-mr/pom.xml b/engine-mr/pom.xml
index dc190c0..90fc355 100644
--- a/engine-mr/pom.xml
+++ b/engine-mr/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.6.3-SNAPSHOT</version>
+        <version>2.6.6</version>
     </parent>
 
     <dependencies>
diff --git a/engine-spark/pom.xml b/engine-spark/pom.xml
index f4f6c82..d5874d4 100644
--- a/engine-spark/pom.xml
+++ b/engine-spark/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.6.3-SNAPSHOT</version>
+        <version>2.6.6</version>
     </parent>
 
     <dependencies>
diff --git a/jdbc/pom.xml b/jdbc/pom.xml
index eea0cad..3c17114 100644
--- a/jdbc/pom.xml
+++ b/jdbc/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.6.3-SNAPSHOT</version>
+        <version>2.6.6</version>
     </parent>
 
     <properties>
diff --git a/kylin-it/pom.xml b/kylin-it/pom.xml
index ce59563..2d24f59 100644
--- a/kylin-it/pom.xml
+++ b/kylin-it/pom.xml
@@ -29,7 +29,7 @@
     <parent>
         <artifactId>kylin</artifactId>
         <groupId>org.apache.kylin</groupId>
-        <version>2.6.3-SNAPSHOT</version>
+        <version>2.6.6</version>
     </parent>
 
     <properties>
diff --git a/metrics-reporter-hive/pom.xml b/metrics-reporter-hive/pom.xml
index aa0f0c1..2ad5034 100644
--- a/metrics-reporter-hive/pom.xml
+++ b/metrics-reporter-hive/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <artifactId>kylin</artifactId>
         <groupId>org.apache.kylin</groupId>
-        <version>2.6.3-SNAPSHOT</version>
+        <version>2.6.6</version>
     </parent>
 
     <dependencies>
diff --git a/metrics-reporter-kafka/pom.xml b/metrics-reporter-kafka/pom.xml
index cda6b30..11cae58 100644
--- a/metrics-reporter-kafka/pom.xml
+++ b/metrics-reporter-kafka/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <artifactId>kylin</artifactId>
         <groupId>org.apache.kylin</groupId>
-        <version>2.6.3-SNAPSHOT</version>
+        <version>2.6.6</version>
     </parent>
 
     <dependencies>
diff --git a/pom.xml b/pom.xml
index 652321a..b85b2b1 100644
--- a/pom.xml
+++ b/pom.xml
@@ -30,7 +30,7 @@
   <groupId>org.apache.kylin</groupId>
   <artifactId>kylin</artifactId>
   <packaging>pom</packaging>
-  <version>2.6.3-SNAPSHOT</version>
+  <version>2.6.6</version>
 
   <name>Apache Kylin</name>
   <url>http://kylin.apache.org</url>
@@ -207,7 +207,7 @@
     <developerConnection>scm:git:ssh://git@github.com/apache/kylin.git
     </developerConnection>
     <url>https://github.com/apache/kylin</url>
-    <tag>HEAD</tag>
+    <tag>kylin-2.6.6</tag>
   </scm>
 
   <dependencyManagement>
diff --git a/query/pom.xml b/query/pom.xml
index 5104f71..844bcee 100644
--- a/query/pom.xml
+++ b/query/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.6.3-SNAPSHOT</version>
+        <version>2.6.6</version>
     </parent>
 
     <dependencies>
diff --git a/server-base/pom.xml b/server-base/pom.xml
index 8f4e102..84b1176 100644
--- a/server-base/pom.xml
+++ b/server-base/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.6.3-SNAPSHOT</version>
+        <version>2.6.6</version>
     </parent>
 
     <dependencies>
diff --git a/server/pom.xml b/server/pom.xml
index 40d29bf..d10089d 100644
--- a/server/pom.xml
+++ b/server/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.6.3-SNAPSHOT</version>
+        <version>2.6.6</version>
     </parent>
 
     <dependencies>
diff --git a/source-hive/pom.xml b/source-hive/pom.xml
index 58f73c1..b07fe73 100644
--- a/source-hive/pom.xml
+++ b/source-hive/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.6.3-SNAPSHOT</version>
+        <version>2.6.6</version>
     </parent>
 
     <dependencies>
diff --git a/source-jdbc/pom.xml b/source-jdbc/pom.xml
index 7548457..e88621c 100644
--- a/source-jdbc/pom.xml
+++ b/source-jdbc/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.6.3-SNAPSHOT</version>
+        <version>2.6.6</version>
     </parent>
 
     <dependencies>
diff --git a/source-kafka/pom.xml b/source-kafka/pom.xml
index 94bcec0..ce0226d 100644
--- a/source-kafka/pom.xml
+++ b/source-kafka/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.6.3-SNAPSHOT</version>
+        <version>2.6.6</version>
     </parent>
 
     <dependencies>
diff --git a/storage-hbase/pom.xml b/storage-hbase/pom.xml
index 5355e18..f48e305 100644
--- a/storage-hbase/pom.xml
+++ b/storage-hbase/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.6.3-SNAPSHOT</version>
+        <version>2.6.6</version>
     </parent>
 
     <properties>
diff --git a/tomcat-ext/pom.xml b/tomcat-ext/pom.xml
index a085f1b..f7eac20 100644
--- a/tomcat-ext/pom.xml
+++ b/tomcat-ext/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.6.3-SNAPSHOT</version>
+        <version>2.6.6</version>
     </parent>
 
     <dependencies>
diff --git a/tool-assembly/pom.xml b/tool-assembly/pom.xml
index d88855e..3371862 100644
--- a/tool-assembly/pom.xml
+++ b/tool-assembly/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <artifactId>kylin</artifactId>
         <groupId>org.apache.kylin</groupId>
-        <version>2.6.3-SNAPSHOT</version>
+        <version>2.6.6</version>
     </parent>
 
     <properties>
diff --git a/tool/pom.xml b/tool/pom.xml
index 9ffb0e4..7d6ed78 100644
--- a/tool/pom.xml
+++ b/tool/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <artifactId>kylin</artifactId>
         <groupId>org.apache.kylin</groupId>
-        <version>2.6.3-SNAPSHOT</version>
+        <version>2.6.6</version>
     </parent>
 
     <properties>