diff --git a/src/main/java/org/redisson/client/handler/RedisEncoder.java b/src/main/java/org/redisson/client/handler/RedisEncoder.java
index 735ea6eb3..8bea0feeb 100644
--- a/src/main/java/org/redisson/client/handler/RedisEncoder.java
+++ b/src/main/java/org/redisson/client/handler/RedisEncoder.java
@@ -20,6 +20,7 @@ import java.util.Arrays;
 import io.netty.buffer.ByteBuf;
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.handler.codec.MessageToByteEncoder;
+import io.netty.util.CharsetUtil;
 
 public class RedisEncoder extends MessageToByteEncoder<RedisData<Object, Object>> {
 
@@ -51,8 +52,8 @@ public class RedisEncoder extends MessageToByteEncoder<RedisData<Object, Object>
             i++;
         }
 
-//        String o = out.toString(CharsetUtil.UTF_8);
-//        System.out.println(o);
+        String o = out.toString(CharsetUtil.UTF_8);
+        System.out.println(o);
     }
 
     private void writeArgument(ByteBuf out, byte[] arg) {
diff --git a/src/main/java/org/redisson/client/protocol/RedisCommands.java b/src/main/java/org/redisson/client/protocol/RedisCommands.java
index fb625bbf6..d577be876 100644
--- a/src/main/java/org/redisson/client/protocol/RedisCommands.java
+++ b/src/main/java/org/redisson/client/protocol/RedisCommands.java
@@ -29,6 +29,13 @@ import org.redisson.client.protocol.pubsub.PubSubStatusMessage;
 
 public interface RedisCommands {
 
+    RedisStrictCommand<Boolean> EVAL_BOOLEAN = new RedisStrictCommand<Boolean>("EVAL", new BooleanReplayConvertor());
+    RedisStrictCommand<Long> EVAL_INTEGER = new RedisStrictCommand<Long>("EVAL");
+
+    RedisStrictCommand<Long> INCR = new RedisStrictCommand<Long>("INCR");
+    RedisStrictCommand<Long> INCRBY = new RedisStrictCommand<Long>("INCRBY");
+    RedisStrictCommand<Long> DECR = new RedisStrictCommand<Long>("DECR");
+
     RedisStrictCommand<String> AUTH = new RedisStrictCommand<String>("AUTH", new StringReplayDecoder());
     RedisStrictCommand<String> SELECT = new RedisStrictCommand<String>("SELECT", new StringReplayDecoder());
     RedisStrictCommand<String> CLIENT_SETNAME = new RedisStrictCommand<String>("CLIENT", "SETNAME", new StringReplayDecoder());
diff --git a/src/main/java/org/redisson/client/protocol/StringCodec.java b/src/main/java/org/redisson/client/protocol/StringCodec.java
index ab108bcbf..bcb746fd2 100644
--- a/src/main/java/org/redisson/client/protocol/StringCodec.java
+++ b/src/main/java/org/redisson/client/protocol/StringCodec.java
@@ -22,6 +22,8 @@ import io.netty.util.CharsetUtil;
 
 public class StringCodec implements Codec {
 
+    public static final StringCodec INSTANCE = new StringCodec();
+
     @Override
     public byte[] encode(int paramIndex, Object in) {
         try {