diff --git a/redisson/src/main/java/org/redisson/codec/IonJacksonCodec.java b/redisson/src/main/java/org/redisson/codec/IonJacksonCodec.java
index cac4037f3..4ec021e7c 100644
--- a/redisson/src/main/java/org/redisson/codec/IonJacksonCodec.java
+++ b/redisson/src/main/java/org/redisson/codec/IonJacksonCodec.java
@@ -18,8 +18,13 @@ package org.redisson.codec;
 import com.fasterxml.jackson.dataformat.ion.IonObjectMapper;
 
 /**
- * Amazon Ion codec
- * 
+ * Amazon Ion codec based on Jackson implementation
+ * <a href="https://github.com/FasterXML/jackson-dataformats-binary/tree/master/ion">
+ *     https://github.com/FasterXML/jackson-dataformats-binary/tree/master/ion
+ * </a>
+ * <p>
+ * Fully thread-safe.
+ *
  * @author Nikita Koksharov
  *
  */
diff --git a/redisson/src/main/java/org/redisson/codec/JsonJacksonCodec.java b/redisson/src/main/java/org/redisson/codec/JsonJacksonCodec.java
index 2b83aea6a..9bbb4c307 100755
--- a/redisson/src/main/java/org/redisson/codec/JsonJacksonCodec.java
+++ b/redisson/src/main/java/org/redisson/codec/JsonJacksonCodec.java
@@ -49,6 +49,10 @@ import io.netty.buffer.ByteBufInputStream;
 import io.netty.buffer.ByteBufOutputStream;
 
 /**
+ * Json codec based on Jackson implementation.
+ * https://github.com/FasterXML/jackson
+ * <p>
+ * Fully thread-safe.
  *
  * @see org.redisson.codec.CborJacksonCodec
  * @see org.redisson.codec.MsgPackJacksonCodec
diff --git a/redisson/src/main/java/org/redisson/codec/Kryo5Codec.java b/redisson/src/main/java/org/redisson/codec/Kryo5Codec.java
index 57a26f41f..b36f7eb42 100644
--- a/redisson/src/main/java/org/redisson/codec/Kryo5Codec.java
+++ b/redisson/src/main/java/org/redisson/codec/Kryo5Codec.java
@@ -32,6 +32,9 @@ import org.redisson.client.protocol.Encoder;
 import java.io.IOException;
 
 /**
+ * Kryo 5 codec
+ * <p>
+ * Fully thread-safe.
  *
  * @author Nikita Koksharov
  *
diff --git a/redisson/src/main/java/org/redisson/codec/KryoCodec.java b/redisson/src/main/java/org/redisson/codec/KryoCodec.java
index e4401171e..09ebaec47 100755
--- a/redisson/src/main/java/org/redisson/codec/KryoCodec.java
+++ b/redisson/src/main/java/org/redisson/codec/KryoCodec.java
@@ -34,7 +34,10 @@ import java.util.Queue;
 import java.util.concurrent.ConcurrentLinkedQueue;
 
 /**
- * 
+ * Kryo 4 codec
+ * <p>
+ * Fully thread-safe.
+ *
  * @author Nikita Koksharov
  *
  */
diff --git a/redisson/src/main/java/org/redisson/codec/MsgPackJacksonCodec.java b/redisson/src/main/java/org/redisson/codec/MsgPackJacksonCodec.java
index 483f4b05f..9cefacd81 100644
--- a/redisson/src/main/java/org/redisson/codec/MsgPackJacksonCodec.java
+++ b/redisson/src/main/java/org/redisson/codec/MsgPackJacksonCodec.java
@@ -21,6 +21,8 @@ import com.fasterxml.jackson.databind.ObjectMapper;
 
 /**
  * MsgPack binary codec
+ * <p>
+ * Fully thread-safe.
  *
  * @author Nikita Koksharov
  *
diff --git a/redisson/src/main/java/org/redisson/codec/SerializationCodec.java b/redisson/src/main/java/org/redisson/codec/SerializationCodec.java
index 0be0a5d74..657f6013e 100644
--- a/redisson/src/main/java/org/redisson/codec/SerializationCodec.java
+++ b/redisson/src/main/java/org/redisson/codec/SerializationCodec.java
@@ -30,6 +30,9 @@ import io.netty.buffer.ByteBufInputStream;
 import io.netty.buffer.ByteBufOutputStream;
 
 /**
+ * JDK's serialization codec.
+ * <p>
+ * Fully thread-safe.*
  *
  * @author Nikita Koksharov
  *
diff --git a/redisson/src/main/java/org/redisson/codec/SmileJacksonCodec.java b/redisson/src/main/java/org/redisson/codec/SmileJacksonCodec.java
index 361884ef1..824e47dc6 100644
--- a/redisson/src/main/java/org/redisson/codec/SmileJacksonCodec.java
+++ b/redisson/src/main/java/org/redisson/codec/SmileJacksonCodec.java
@@ -19,7 +19,9 @@ import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.dataformat.smile.SmileFactory;
 
 /**
- * Smile binary codec
+ * Smile binary codec.
+ * <p>
+ * Fully thread-safe.
  *
  * @author Nikita Koksharov
  *