diff --git a/fizz-common/src/test/java/we/util/JsonSchemaUtilsTest.java b/fizz-common/src/test/java/we/util/JsonSchemaUtilsTest.java
index 9b1a8aa..a003ef0 100644
--- a/fizz-common/src/test/java/we/util/JsonSchemaUtilsTest.java
+++ b/fizz-common/src/test/java/we/util/JsonSchemaUtilsTest.java
@@ -1,3 +1,20 @@
+/*
+ *  Copyright (C) 2020 the original author or authors.
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package we.util;
 
 import org.junit.jupiter.api.Test;
diff --git a/fizz-common/src/test/java/we/xml/XmlTests.java b/fizz-common/src/test/java/we/xml/XmlTests.java
index b6c0f43..85b1f64 100644
--- a/fizz-common/src/test/java/we/xml/XmlTests.java
+++ b/fizz-common/src/test/java/we/xml/XmlTests.java
@@ -1,3 +1,20 @@
+/*
+ *  Copyright (C) 2020 the original author or authors.
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package we.xml;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
diff --git a/fizz-core/src/main/java/we/config/ApolloConfig.java b/fizz-core/src/main/java/we/config/ApolloConfig.java
index f41e8a6..8491704 100644
--- a/fizz-core/src/main/java/we/config/ApolloConfig.java
+++ b/fizz-core/src/main/java/we/config/ApolloConfig.java
@@ -1,3 +1,20 @@
+/*
+ *  Copyright (C) 2020 the original author or authors.
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package we.config;
 
 import com.ctrip.framework.apollo.spring.annotation.EnableApolloConfig;
diff --git a/fizz-core/src/main/java/we/fizz/exception/FizzException.java b/fizz-core/src/main/java/we/fizz/exception/FizzException.java
index e18085a..c933ba3 100644
--- a/fizz-core/src/main/java/we/fizz/exception/FizzException.java
+++ b/fizz-core/src/main/java/we/fizz/exception/FizzException.java
@@ -1,3 +1,20 @@
+/*
+ *  Copyright (C) 2020 the original author or authors.
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package we.fizz.exception;
 
 public class FizzException extends Exception {
diff --git a/fizz-core/src/main/java/we/fizz/exception/FizzRuntimeException.java b/fizz-core/src/main/java/we/fizz/exception/FizzRuntimeException.java
index 929fe1c..5b72d73 100644
--- a/fizz-core/src/main/java/we/fizz/exception/FizzRuntimeException.java
+++ b/fizz-core/src/main/java/we/fizz/exception/FizzRuntimeException.java
@@ -1,3 +1,20 @@
+/*
+ *  Copyright (C) 2020 the original author or authors.
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package we.fizz.exception;
 
 import we.fizz.StepContext;
diff --git a/fizz-core/src/main/java/we/fizz/input/IInput.java b/fizz-core/src/main/java/we/fizz/input/IInput.java
index 5b02c74..f9fa67f 100644
--- a/fizz-core/src/main/java/we/fizz/input/IInput.java
+++ b/fizz-core/src/main/java/we/fizz/input/IInput.java
@@ -1,3 +1,20 @@
+/*
+ *  Copyright (C) 2020 the original author or authors.
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package we.fizz.input;
 
 import org.springframework.context.ConfigurableApplicationContext;
diff --git a/fizz-core/src/main/java/we/flume/clients/log4j2appender/LogService.java b/fizz-core/src/main/java/we/flume/clients/log4j2appender/LogService.java
index fe9f72f..8294458 100644
--- a/fizz-core/src/main/java/we/flume/clients/log4j2appender/LogService.java
+++ b/fizz-core/src/main/java/we/flume/clients/log4j2appender/LogService.java
@@ -1,3 +1,20 @@
+/*
+ *  Copyright (C) 2020 the original author or authors.
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package we.flume.clients.log4j2appender;
 
 import we.constants.CommonConstants;
diff --git a/fizz-core/src/main/java/we/flume/clients/log4j2appender/ThreadContext.java b/fizz-core/src/main/java/we/flume/clients/log4j2appender/ThreadContext.java
index 856d58d..af66657 100644
--- a/fizz-core/src/main/java/we/flume/clients/log4j2appender/ThreadContext.java
+++ b/fizz-core/src/main/java/we/flume/clients/log4j2appender/ThreadContext.java
@@ -1,3 +1,20 @@
+/*
+ *  Copyright (C) 2020 the original author or authors.
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package we.flume.clients.log4j2appender;
 
 import java.text.SimpleDateFormat;
diff --git a/fizz-core/src/main/java/we/proxy/AbstractDiscoveryClientUriSelector.java b/fizz-core/src/main/java/we/proxy/AbstractDiscoveryClientUriSelector.java
index 94ab1de..2c48098 100644
--- a/fizz-core/src/main/java/we/proxy/AbstractDiscoveryClientUriSelector.java
+++ b/fizz-core/src/main/java/we/proxy/AbstractDiscoveryClientUriSelector.java
@@ -1,3 +1,20 @@
+/*
+ *  Copyright (C) 2020 the original author or authors.
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package we.proxy;
 
 import we.util.Constants;
diff --git a/fizz-core/src/main/java/we/proxy/DisableDiscoveryUriSelector.java b/fizz-core/src/main/java/we/proxy/DisableDiscoveryUriSelector.java
index 8067d6e..5c8fdf4 100644
--- a/fizz-core/src/main/java/we/proxy/DisableDiscoveryUriSelector.java
+++ b/fizz-core/src/main/java/we/proxy/DisableDiscoveryUriSelector.java
@@ -1,3 +1,20 @@
+/*
+ *  Copyright (C) 2020 the original author or authors.
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package we.proxy;
 
 import org.springframework.boot.autoconfigure.condition.ConditionalOnExpression;
diff --git a/fizz-core/src/main/java/we/proxy/DiscoveryClientUriSelector.java b/fizz-core/src/main/java/we/proxy/DiscoveryClientUriSelector.java
index 555fd8c..025290b 100644
--- a/fizz-core/src/main/java/we/proxy/DiscoveryClientUriSelector.java
+++ b/fizz-core/src/main/java/we/proxy/DiscoveryClientUriSelector.java
@@ -1,3 +1,20 @@
+/*
+ *  Copyright (C) 2020 the original author or authors.
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package we.proxy;
 
 /**
diff --git a/fizz-core/src/main/java/we/proxy/EurekaUriSelector.java b/fizz-core/src/main/java/we/proxy/EurekaUriSelector.java
index e8d25a0..287fa74 100644
--- a/fizz-core/src/main/java/we/proxy/EurekaUriSelector.java
+++ b/fizz-core/src/main/java/we/proxy/EurekaUriSelector.java
@@ -1,3 +1,20 @@
+/*
+ *  Copyright (C) 2020 the original author or authors.
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package we.proxy;
 
 import com.netflix.appinfo.InstanceInfo;
diff --git a/fizz-core/src/main/java/we/proxy/NacosUriSelector.java b/fizz-core/src/main/java/we/proxy/NacosUriSelector.java
index ce254c9..8d16250 100644
--- a/fizz-core/src/main/java/we/proxy/NacosUriSelector.java
+++ b/fizz-core/src/main/java/we/proxy/NacosUriSelector.java
@@ -1,3 +1,20 @@
+/*
+ *  Copyright (C) 2020 the original author or authors.
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package we.proxy;
 
 import com.alibaba.cloud.nacos.NacosDiscoveryProperties;
diff --git a/fizz-core/src/main/java/we/proxy/grpc/GrpcGenericService.java b/fizz-core/src/main/java/we/proxy/grpc/GrpcGenericService.java
index 6d50e2f..e584e29 100644
--- a/fizz-core/src/main/java/we/proxy/grpc/GrpcGenericService.java
+++ b/fizz-core/src/main/java/we/proxy/grpc/GrpcGenericService.java
@@ -1,3 +1,20 @@
+/*
+ *  Copyright (C) 2020 the original author or authors.
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package we.proxy.grpc;
 
 import com.google.common.net.HostAndPort;
diff --git a/fizz-core/src/main/java/we/proxy/grpc/GrpcInterfaceDeclaration.java b/fizz-core/src/main/java/we/proxy/grpc/GrpcInterfaceDeclaration.java
index 1bac694..1a23f77 100644
--- a/fizz-core/src/main/java/we/proxy/grpc/GrpcInterfaceDeclaration.java
+++ b/fizz-core/src/main/java/we/proxy/grpc/GrpcInterfaceDeclaration.java
@@ -1,3 +1,20 @@
+/*
+ *  Copyright (C) 2020 the original author or authors.
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package we.proxy.grpc;
 
 public class GrpcInterfaceDeclaration {
diff --git a/fizz-core/src/main/java/we/proxy/grpc/ListenableFutureAdapter.java b/fizz-core/src/main/java/we/proxy/grpc/ListenableFutureAdapter.java
index 0a6bdd0..6701fde 100644
--- a/fizz-core/src/main/java/we/proxy/grpc/ListenableFutureAdapter.java
+++ b/fizz-core/src/main/java/we/proxy/grpc/ListenableFutureAdapter.java
@@ -1,3 +1,20 @@
+/*
+ *  Copyright (C) 2020 the original author or authors.
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package we.proxy.grpc;
 
 import com.google.common.util.concurrent.FutureCallback;
diff --git a/fizz-core/src/main/java/we/proxy/grpc/client/utils/ChannelFactory.java b/fizz-core/src/main/java/we/proxy/grpc/client/utils/ChannelFactory.java
index 3e59f1d..3eaca96 100644
--- a/fizz-core/src/main/java/we/proxy/grpc/client/utils/ChannelFactory.java
+++ b/fizz-core/src/main/java/we/proxy/grpc/client/utils/ChannelFactory.java
@@ -1,3 +1,20 @@
+/*
+ *  Copyright (C) 2020 the original author or authors.
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package we.proxy.grpc.client.utils;
 
 import static io.grpc.Metadata.ASCII_STRING_MARSHALLER;
diff --git a/fizz-core/src/main/java/we/proxy/grpc/client/utils/GrpcReflectionUtils.java b/fizz-core/src/main/java/we/proxy/grpc/client/utils/GrpcReflectionUtils.java
index 778c70d..0320ca3 100644
--- a/fizz-core/src/main/java/we/proxy/grpc/client/utils/GrpcReflectionUtils.java
+++ b/fizz-core/src/main/java/we/proxy/grpc/client/utils/GrpcReflectionUtils.java
@@ -1,3 +1,20 @@
+/*
+ *  Copyright (C) 2020 the original author or authors.
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package we.proxy.grpc.client.utils;
 
 import static com.google.common.base.Preconditions.checkArgument;
diff --git a/fizz-core/src/main/java/we/proxy/grpc/client/utils/MessageWriter.java b/fizz-core/src/main/java/we/proxy/grpc/client/utils/MessageWriter.java
index 8184e59..a69d641 100644
--- a/fizz-core/src/main/java/we/proxy/grpc/client/utils/MessageWriter.java
+++ b/fizz-core/src/main/java/we/proxy/grpc/client/utils/MessageWriter.java
@@ -1,3 +1,20 @@
+/*
+ *  Copyright (C) 2020 the original author or authors.
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package we.proxy.grpc.client.utils;
 
 import static com.google.protobuf.util.JsonFormat.TypeRegistry;