diff --git a/src/main/java/com/verificationgentleman/gradle/hdvl/HDVLCompileSpec.java b/src/main/java/com/verificationgentleman/gradle/hdvl/HDVLCompileSpec.java
index b986484..a82ae0f 100644
--- a/src/main/java/com/verificationgentleman/gradle/hdvl/HDVLCompileSpec.java
+++ b/src/main/java/com/verificationgentleman/gradle/hdvl/HDVLCompileSpec.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2024 the original author or authors.
+ *
+ * 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 com.verificationgentleman.gradle.hdvl;
 
 import java.io.File;
diff --git a/src/main/java/com/verificationgentleman/gradle/hdvl/internal/DefaultHDVLCompileSpec.java b/src/main/java/com/verificationgentleman/gradle/hdvl/internal/DefaultHDVLCompileSpec.java
index 55980f5..f063ec8 100644
--- a/src/main/java/com/verificationgentleman/gradle/hdvl/internal/DefaultHDVLCompileSpec.java
+++ b/src/main/java/com/verificationgentleman/gradle/hdvl/internal/DefaultHDVLCompileSpec.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2024 the original author or authors.
+ *
+ * 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 com.verificationgentleman.gradle.hdvl.internal;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
diff --git a/src/main/java/com/verificationgentleman/gradle/hdvl/internal/FileDeserializer.java b/src/main/java/com/verificationgentleman/gradle/hdvl/internal/FileDeserializer.java
index 08dcca9..457720e 100644
--- a/src/main/java/com/verificationgentleman/gradle/hdvl/internal/FileDeserializer.java
+++ b/src/main/java/com/verificationgentleman/gradle/hdvl/internal/FileDeserializer.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2024 the original author or authors.
+ *
+ * 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 com.verificationgentleman.gradle.hdvl.internal;
 
 import com.fasterxml.jackson.core.JacksonException;
diff --git a/src/main/java/com/verificationgentleman/gradle/hdvl/internal/FileSerializer.java b/src/main/java/com/verificationgentleman/gradle/hdvl/internal/FileSerializer.java
index ee00158..186a603 100644
--- a/src/main/java/com/verificationgentleman/gradle/hdvl/internal/FileSerializer.java
+++ b/src/main/java/com/verificationgentleman/gradle/hdvl/internal/FileSerializer.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2024 the original author or authors.
+ *
+ * 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 com.verificationgentleman.gradle.hdvl.internal;
 
 import com.fasterxml.jackson.core.JsonGenerator;
diff --git a/src/main/java/com/verificationgentleman/gradle/hdvl/internal/Unzip.java b/src/main/java/com/verificationgentleman/gradle/hdvl/internal/Unzip.java
index 8274e3a..cd23ede 100644
--- a/src/main/java/com/verificationgentleman/gradle/hdvl/internal/Unzip.java
+++ b/src/main/java/com/verificationgentleman/gradle/hdvl/internal/Unzip.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2024 the original author or authors.
+ *
+ * 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 com.verificationgentleman.gradle.hdvl.internal;
 
 import org.gradle.api.Action;
diff --git a/src/main/java/com/verificationgentleman/gradle/hdvl/internal/WriteCompileSpecFile.java b/src/main/java/com/verificationgentleman/gradle/hdvl/internal/WriteCompileSpecFile.java
index aa15ade..7e620a8 100644
--- a/src/main/java/com/verificationgentleman/gradle/hdvl/internal/WriteCompileSpecFile.java
+++ b/src/main/java/com/verificationgentleman/gradle/hdvl/internal/WriteCompileSpecFile.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2024 the original author or authors.
+ *
+ * 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 com.verificationgentleman.gradle.hdvl.internal;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
diff --git a/src/main/java/com/verificationgentleman/gradle/hdvl/internal/WriteXrunArgsFile.java b/src/main/java/com/verificationgentleman/gradle/hdvl/internal/WriteXrunArgsFile.java
index 1211a83..d71c066 100644
--- a/src/main/java/com/verificationgentleman/gradle/hdvl/internal/WriteXrunArgsFile.java
+++ b/src/main/java/com/verificationgentleman/gradle/hdvl/internal/WriteXrunArgsFile.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2024 the original author or authors.
+ *
+ * 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 com.verificationgentleman.gradle.hdvl.internal;
 
 import com.fasterxml.jackson.databind.ObjectMapper;