diff --git a/tigon-model/src/main/java/me/chyxion/tigon/json/ViewModelableSerializer.java b/tigon-model/src/main/java/me/chyxion/tigon/json/ViewModelableSerializer.java
index 2a4e51b..6b7fe26 100644
--- a/tigon-model/src/main/java/me/chyxion/tigon/json/ViewModelableSerializer.java
+++ b/tigon-model/src/main/java/me/chyxion/tigon/json/ViewModelableSerializer.java
@@ -19,7 +19,7 @@ public class ViewModelableSerializer implements ObjectSerializer {
     @Override
     public void write(JSONSerializer serializer, Object object, Object fieldName, Type fieldType, int features) throws IOException {
         if (object != null) {
-            serializer.write(((ViewModelable) object).toMap());
+            serializer.write(((ViewModelable<?>) object).toMap());
         }
         else {
             serializer.writeNull();
diff --git a/tigon-model/src/main/java/me/chyxion/tigon/model/ViewModel.java b/tigon-model/src/main/java/me/chyxion/tigon/model/ViewModel.java
index 9277a15..8d9f24e 100644
--- a/tigon-model/src/main/java/me/chyxion/tigon/model/ViewModel.java
+++ b/tigon-model/src/main/java/me/chyxion/tigon/model/ViewModel.java
@@ -57,7 +57,8 @@ public class ViewModel<T>
     /**
      * {@inheritDoc}
      */
-    @Override
+	@Override
+    @SuppressWarnings("unchecked")
     public <A> A getAttr(String name) {
         return attrs != null ? (A) attrs.get(name) : null;
     }
@@ -93,7 +94,7 @@ public class ViewModel<T>
             else {
                 if (data instanceof ViewModelable) {
                     mapRtn = new HashMap<String, Object>();
-                    mapRtn.put("data", ((ViewModelable) data).toMap());
+                    mapRtn.put("data", ((ViewModelable<?>) data).toMap());
                 }
                 else {
                     Object jsonData = JSON.toJSON(data);
diff --git a/tigon-model/src/main/java/me/chyxion/tigon/mybatis/Search.java b/tigon-model/src/main/java/me/chyxion/tigon/mybatis/Search.java
index 9ee35fd..2a4bf0c 100644
--- a/tigon-model/src/main/java/me/chyxion/tigon/mybatis/Search.java
+++ b/tigon-model/src/main/java/me/chyxion/tigon/mybatis/Search.java
@@ -134,7 +134,7 @@ public class Search implements Serializable {
             criteria.add(new Criterion(CriterionType.IS_NULL, col, value));
         }
         else if (value instanceof Collection) {
-            in(col, (Collection) value);
+            in(col, (Collection<?>) value);
         }
         else if (value.getClass().isArray()) {
             in(col, (Object[]) value);
diff --git a/tigon-model/src/main/java/me/chyxion/tigon/mybatis/SqlFragment.java b/tigon-model/src/main/java/me/chyxion/tigon/mybatis/SqlFragment.java
index 988dd20..5745b1c 100644
--- a/tigon-model/src/main/java/me/chyxion/tigon/mybatis/SqlFragment.java
+++ b/tigon-model/src/main/java/me/chyxion/tigon/mybatis/SqlFragment.java
@@ -12,7 +12,9 @@ import lombok.RequiredArgsConstructor;
 @Getter
 @RequiredArgsConstructor
 public class SqlFragment implements Serializable {
-    private final String sql;
+	private static final long serialVersionUID = 1L;
+
+	private final String sql;
 
     /**
      * {@inheritDoc}
diff --git a/tigon-model/src/test/java/me/chyxion/tigon/test/ViewModelSerializerTest.java b/tigon-model/src/test/java/me/chyxion/tigon/test/ViewModelSerializerTest.java
index 02e2819..043d89f 100644
--- a/tigon-model/src/test/java/me/chyxion/tigon/test/ViewModelSerializerTest.java
+++ b/tigon-model/src/test/java/me/chyxion/tigon/test/ViewModelSerializerTest.java
@@ -15,7 +15,8 @@ import java.util.Arrays;
  */
 public class ViewModelSerializerTest {
 
-    @Test
+	@Test
+    @SuppressWarnings("unchecked")
     public void test() {
         SerializeConfig.getGlobalInstance()
             .put(ViewModel.class, new ViewModelableSerializer());
diff --git a/tigon-shiro-cache-redis/src/main/java/me/chyxion/tigon/shiro/cache/shiro/UserIdKeyRedisSessionCache.java b/tigon-shiro-cache-redis/src/main/java/me/chyxion/tigon/shiro/cache/shiro/UserIdKeyRedisSessionCache.java
index 4a2b30f..171c51b 100644
--- a/tigon-shiro-cache-redis/src/main/java/me/chyxion/tigon/shiro/cache/shiro/UserIdKeyRedisSessionCache.java
+++ b/tigon-shiro-cache-redis/src/main/java/me/chyxion/tigon/shiro/cache/shiro/UserIdKeyRedisSessionCache.java
@@ -1,11 +1,10 @@
 package me.chyxion.tigon.shiro.cache.shiro;
 
 import java.util.Set;
-import org.slf4j.Logger;
 import java.io.Serializable;
 import java.util.Collection;
 import java.util.Collections;
-import org.slf4j.LoggerFactory;
+import lombok.extern.slf4j.Slf4j;
 import java.util.concurrent.TimeUnit;
 import javax.annotation.PostConstruct;
 import org.springframework.util.Assert;
@@ -25,9 +24,8 @@ import org.springframework.beans.factory.annotation.Autowired;
  * chyxion@163.com <br>
  * May 12, 2016 1:25:02 PM
  */
+@Slf4j
 public class UserIdKeyRedisSessionCache implements SessionCache {
-    private static final Logger log = 
-        LoggerFactory.getLogger(UserIdKeyRedisSessionCache.class);
 
     @Autowired
     protected RedisTemplate<Serializable, Serializable> redisTpl;
@@ -166,6 +164,6 @@ public class UserIdKeyRedisSessionCache implements SessionCache {
     }
 
     protected ValueOperations<Serializable, Serializable> valueOp() {
-        return redisTpl.<Serializable, Serializable>opsForValue();
+        return redisTpl.opsForValue();
     }
 }