diff --git a/hugegraph-api/pom.xml b/hugegraph-api/pom.xml
index b687b64ac2..1aefdcce5d 100644
--- a/hugegraph-api/pom.xml
+++ b/hugegraph-api/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>hugegraph</artifactId>
         <groupId>com.baidu.hugegraph</groupId>
-        <version>0.11.2</version>
+        <version>0.12.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/hugegraph-api/src/main/java/com/baidu/hugegraph/version/ApiVersion.java b/hugegraph-api/src/main/java/com/baidu/hugegraph/version/ApiVersion.java
index 4062ef3534..319d47bc20 100644
--- a/hugegraph-api/src/main/java/com/baidu/hugegraph/version/ApiVersion.java
+++ b/hugegraph-api/src/main/java/com/baidu/hugegraph/version/ApiVersion.java
@@ -116,6 +116,6 @@ public final class ApiVersion {
 
     public static final void check() {
         // Check version of hugegraph-core. Firstly do check from version 0.3
-        VersionUtil.check(CoreVersion.VERSION, "0.11", "0.12", CoreVersion.NAME);
+        VersionUtil.check(CoreVersion.VERSION, "0.12", "0.13", CoreVersion.NAME);
     }
 }
diff --git a/hugegraph-cassandra/pom.xml b/hugegraph-cassandra/pom.xml
index 7fb53b4420..992ed514dd 100644
--- a/hugegraph-cassandra/pom.xml
+++ b/hugegraph-cassandra/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>hugegraph</artifactId>
         <groupId>com.baidu.hugegraph</groupId>
-        <version>0.11.2</version>
+        <version>0.12.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/hugegraph-core/pom.xml b/hugegraph-core/pom.xml
index 6b79e236fe..61b26a5981 100644
--- a/hugegraph-core/pom.xml
+++ b/hugegraph-core/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>com.baidu.hugegraph</groupId>
         <artifactId>hugegraph</artifactId>
-        <version>0.11.2</version>
+        <version>0.12.0</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <artifactId>hugegraph-core</artifactId>
@@ -19,7 +19,7 @@
         <dependency>
             <groupId>com.baidu.hugegraph</groupId>
             <artifactId>hugegraph-common</artifactId>
-            <version>1.8.1</version>
+            <version>1.8.4</version>
         </dependency>
 
         <!-- tinkerpop -->
@@ -208,7 +208,7 @@
                             </addDefaultSpecificationEntries>
                         </manifest>
                         <manifestEntries>
-                            <Implementation-Version>0.11.2.0</Implementation-Version>
+                            <Implementation-Version>0.12.0.0</Implementation-Version>
                         </manifestEntries>
                     </archive>
                 </configuration>
diff --git a/hugegraph-core/src/main/java/com/baidu/hugegraph/io/HugeGraphSONModule.java b/hugegraph-core/src/main/java/com/baidu/hugegraph/io/HugeGraphSONModule.java
index 8e214adb03..5c1d60fd16 100644
--- a/hugegraph-core/src/main/java/com/baidu/hugegraph/io/HugeGraphSONModule.java
+++ b/hugegraph-core/src/main/java/com/baidu/hugegraph/io/HugeGraphSONModule.java
@@ -21,6 +21,8 @@
 
 import java.io.File;
 import java.io.IOException;
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
 import java.util.Date;
 import java.util.Map;
 import java.util.Optional;
@@ -58,7 +60,6 @@
 import com.baidu.hugegraph.backend.id.IdGenerator.StringId;
 import com.baidu.hugegraph.backend.id.IdGenerator.UuidId;
 import com.baidu.hugegraph.backend.store.Shard;
-import com.baidu.hugegraph.date.SafeDateFormat;
 import com.baidu.hugegraph.schema.EdgeLabel;
 import com.baidu.hugegraph.schema.IndexLabel;
 import com.baidu.hugegraph.schema.PropertyKey;
@@ -85,8 +86,9 @@ public class HugeGraphSONModule extends TinkerPopJacksonModule {
     private static final GraphSONSchemaSerializer schemaSerializer =
                          new GraphSONSchemaSerializer();
 
+    // NOTE: jackson will synchronize DateFormat
     private static final String DF = "yyyy-MM-dd HH:mm:ss.SSS";
-    private static final SafeDateFormat DATE_FORMAT = new SafeDateFormat(DF);
+    private static final DateFormat DATE_FORMAT = new SimpleDateFormat(DF);
 
     static {
         TYPE_DEFINITIONS = new ConcurrentHashMap<>();
diff --git a/hugegraph-core/src/main/java/com/baidu/hugegraph/version/CoreVersion.java b/hugegraph-core/src/main/java/com/baidu/hugegraph/version/CoreVersion.java
index e2812029f1..f912d6e722 100644
--- a/hugegraph-core/src/main/java/com/baidu/hugegraph/version/CoreVersion.java
+++ b/hugegraph-core/src/main/java/com/baidu/hugegraph/version/CoreVersion.java
@@ -33,7 +33,7 @@ public class CoreVersion {
 
     // The second parameter of Version.of() is for IDE running without JAR
     public static final Version VERSION = Version.of(CoreVersion.class,
-                                                     "0.11.2");
+                                                     "0.12.0");
 
     public static final String GREMLIN_VERSION = "3.4.3";
 
diff --git a/hugegraph-dist/pom.xml b/hugegraph-dist/pom.xml
index 92d8ca25a6..60e770b3fa 100644
--- a/hugegraph-dist/pom.xml
+++ b/hugegraph-dist/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>hugegraph</artifactId>
         <groupId>com.baidu.hugegraph</groupId>
-        <version>0.11.2</version>
+        <version>0.12.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <name>hugegraph-dist</name>
diff --git a/hugegraph-example/pom.xml b/hugegraph-example/pom.xml
index d60ebe14cf..7ddfc44d50 100644
--- a/hugegraph-example/pom.xml
+++ b/hugegraph-example/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>hugegraph</artifactId>
         <groupId>com.baidu.hugegraph</groupId>
-        <version>0.11.2</version>
+        <version>0.12.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/hugegraph-hbase/pom.xml b/hugegraph-hbase/pom.xml
index 458ef75023..9fd639474d 100644
--- a/hugegraph-hbase/pom.xml
+++ b/hugegraph-hbase/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>hugegraph</artifactId>
         <groupId>com.baidu.hugegraph</groupId>
-        <version>0.11.2</version>
+        <version>0.12.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/hugegraph-mysql/pom.xml b/hugegraph-mysql/pom.xml
index d2666f5220..2e6f663f5e 100644
--- a/hugegraph-mysql/pom.xml
+++ b/hugegraph-mysql/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>hugegraph</artifactId>
         <groupId>com.baidu.hugegraph</groupId>
-        <version>0.11.2</version>
+        <version>0.12.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/hugegraph-palo/pom.xml b/hugegraph-palo/pom.xml
index 2180f2a908..561f5a9ee7 100644
--- a/hugegraph-palo/pom.xml
+++ b/hugegraph-palo/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>hugegraph</artifactId>
         <groupId>com.baidu.hugegraph</groupId>
-        <version>0.11.2</version>
+        <version>0.12.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/hugegraph-palo/src/main/java/com/baidu/hugegraph/backend/store/palo/PaloSessions.java b/hugegraph-palo/src/main/java/com/baidu/hugegraph/backend/store/palo/PaloSessions.java
index d349bbb510..7f52fddfed 100644
--- a/hugegraph-palo/src/main/java/com/baidu/hugegraph/backend/store/palo/PaloSessions.java
+++ b/hugegraph-palo/src/main/java/com/baidu/hugegraph/backend/store/palo/PaloSessions.java
@@ -219,7 +219,7 @@ private PaloLoadInfo getLoadInfoByLabel(String label) {
     public final class PaloLoadTask extends TimerTask {
 
         private static final String DF = "yyyy-MM-dd-HH-mm-ss";
-        private final DateFormat DATE_FORMAT = new SafeDateFormat(DF);
+        private final SafeDateFormat DATE_FORMAT = new SafeDateFormat(DF);
 
         /**
          * There exist two running palo load task corresponds to two stores,
diff --git a/hugegraph-postgresql/pom.xml b/hugegraph-postgresql/pom.xml
index 79336464b2..c5012d7abe 100644
--- a/hugegraph-postgresql/pom.xml
+++ b/hugegraph-postgresql/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>hugegraph</artifactId>
         <groupId>com.baidu.hugegraph</groupId>
-        <version>0.11.2</version>
+        <version>0.12.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/hugegraph-rocksdb/pom.xml b/hugegraph-rocksdb/pom.xml
index 8cdb4f3ceb..ebd88cd1e9 100644
--- a/hugegraph-rocksdb/pom.xml
+++ b/hugegraph-rocksdb/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>hugegraph</artifactId>
         <groupId>com.baidu.hugegraph</groupId>
-        <version>0.11.2</version>
+        <version>0.12.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/hugegraph-scylladb/pom.xml b/hugegraph-scylladb/pom.xml
index 20b6dc7f82..6ba5b8c87f 100644
--- a/hugegraph-scylladb/pom.xml
+++ b/hugegraph-scylladb/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>hugegraph</artifactId>
         <groupId>com.baidu.hugegraph</groupId>
-        <version>0.11.2</version>
+        <version>0.12.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/hugegraph-test/pom.xml b/hugegraph-test/pom.xml
index 983761d309..0177e38bb3 100644
--- a/hugegraph-test/pom.xml
+++ b/hugegraph-test/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>hugegraph</artifactId>
         <groupId>com.baidu.hugegraph</groupId>
-        <version>0.11.2</version>
+        <version>0.12.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/pom.xml b/pom.xml
index 0e11102214..dfbc8063c0 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.baidu.hugegraph</groupId>
     <artifactId>hugegraph</artifactId>
-    <version>0.11.2</version>
+    <version>0.12.0</version>
     <packaging>pom</packaging>
     <prerequisites>
         <maven>3.3.9</maven>