diff --git a/buildSrc/src/main/groovy/org/springframework/restdocs/build/matrix/MatrixTestExtension.groovy b/buildSrc/src/main/groovy/org/springframework/restdocs/build/matrix/MatrixTestExtension.groovy
index da282f7b..543316fd 100644
--- a/buildSrc/src/main/groovy/org/springframework/restdocs/build/matrix/MatrixTestExtension.groovy
+++ b/buildSrc/src/main/groovy/org/springframework/restdocs/build/matrix/MatrixTestExtension.groovy
@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2019 the original author or authors.
+ * Copyright 2014-2021 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.
diff --git a/buildSrc/src/main/groovy/org/springframework/restdocs/build/matrix/MatrixTestPlugin.groovy b/buildSrc/src/main/groovy/org/springframework/restdocs/build/matrix/MatrixTestPlugin.groovy
index 56825bf7..65551d11 100644
--- a/buildSrc/src/main/groovy/org/springframework/restdocs/build/matrix/MatrixTestPlugin.groovy
+++ b/buildSrc/src/main/groovy/org/springframework/restdocs/build/matrix/MatrixTestPlugin.groovy
@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2018 the original author or authors.
+ * Copyright 2014-2021 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.
diff --git a/buildSrc/src/main/groovy/org/springframework/restdocs/build/samples/SamplesExtension.groovy b/buildSrc/src/main/groovy/org/springframework/restdocs/build/samples/SamplesExtension.groovy
index eae89116..f606e2d6 100644
--- a/buildSrc/src/main/groovy/org/springframework/restdocs/build/samples/SamplesExtension.groovy
+++ b/buildSrc/src/main/groovy/org/springframework/restdocs/build/samples/SamplesExtension.groovy
@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2018 the original author or authors.
+ * Copyright 2014-2021 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.
diff --git a/buildSrc/src/main/groovy/org/springframework/restdocs/build/samples/SamplesPlugin.groovy b/buildSrc/src/main/groovy/org/springframework/restdocs/build/samples/SamplesPlugin.groovy
index 6faec42c..f2f65317 100644
--- a/buildSrc/src/main/groovy/org/springframework/restdocs/build/samples/SamplesPlugin.groovy
+++ b/buildSrc/src/main/groovy/org/springframework/restdocs/build/samples/SamplesPlugin.groovy
@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2018 the original author or authors.
+ * Copyright 2014-2021 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.