diff --git a/redisson/src/main/java/org/redisson/RedissonIdGenerator.java b/redisson/src/main/java/org/redisson/RedissonIdGenerator.java
index 2f03565f6..4e333a496 100644
--- a/redisson/src/main/java/org/redisson/RedissonIdGenerator.java
+++ b/redisson/src/main/java/org/redisson/RedissonIdGenerator.java
@@ -1,3 +1,18 @@
+/**
+ * Copyright (c) 2013-2020 Nikita Koksharov
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package org.redisson;
 
 import org.redisson.api.RFuture;
diff --git a/redisson/src/main/java/org/redisson/api/RIdGenerator.java b/redisson/src/main/java/org/redisson/api/RIdGenerator.java
index 83a084a51..d92f8a315 100644
--- a/redisson/src/main/java/org/redisson/api/RIdGenerator.java
+++ b/redisson/src/main/java/org/redisson/api/RIdGenerator.java
@@ -1,3 +1,18 @@
+/**
+ * Copyright (c) 2013-2020 Nikita Koksharov
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package org.redisson.api;
 
 /**
diff --git a/redisson/src/main/java/org/redisson/api/RIdGeneratorAsync.java b/redisson/src/main/java/org/redisson/api/RIdGeneratorAsync.java
index 4ebefd22b..b5402bb55 100644
--- a/redisson/src/main/java/org/redisson/api/RIdGeneratorAsync.java
+++ b/redisson/src/main/java/org/redisson/api/RIdGeneratorAsync.java
@@ -1,3 +1,18 @@
+/**
+ * Copyright (c) 2013-2020 Nikita Koksharov
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package org.redisson.api;
 
 /**
diff --git a/redisson/src/main/java/org/redisson/api/RIdGeneratorReactive.java b/redisson/src/main/java/org/redisson/api/RIdGeneratorReactive.java
index b7a12ecf9..294214b96 100644
--- a/redisson/src/main/java/org/redisson/api/RIdGeneratorReactive.java
+++ b/redisson/src/main/java/org/redisson/api/RIdGeneratorReactive.java
@@ -1,3 +1,18 @@
+/**
+ * Copyright (c) 2013-2020 Nikita Koksharov
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package org.redisson.api;
 
 import reactor.core.publisher.Mono;
diff --git a/redisson/src/main/java/org/redisson/api/RIdGeneratorRx.java b/redisson/src/main/java/org/redisson/api/RIdGeneratorRx.java
index f4667046b..9f671592f 100644
--- a/redisson/src/main/java/org/redisson/api/RIdGeneratorRx.java
+++ b/redisson/src/main/java/org/redisson/api/RIdGeneratorRx.java
@@ -1,3 +1,18 @@
+/**
+ * Copyright (c) 2013-2020 Nikita Koksharov
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package org.redisson.api;
 
 import io.reactivex.Single;