diff --git a/docs/contributor_guide/adding_operator.dox b/docs/contributor_guide/adding_operator.dox
index 697cddb..67e6fbd 100644
--- a/docs/contributor_guide/adding_operator.dox
+++ b/docs/contributor_guide/adding_operator.dox
@@ -1,5 +1,5 @@
 ///
-/// Copyright (c) 2018-2019 Arm Limited.
+/// Copyright (c) 2018-2021 Arm Limited.
 ///
 /// SPDX-License-Identifier: MIT
 ///
diff --git a/docs/contributor_guide/contribution_guidelines.dox b/docs/contributor_guide/contribution_guidelines.dox
index 9d85413..ec3e3a7 100644
--- a/docs/contributor_guide/contribution_guidelines.dox
+++ b/docs/contributor_guide/contribution_guidelines.dox
@@ -1,5 +1,5 @@
 ///
-/// Copyright (c) 2019 Arm Limited.
+/// Copyright (c) 2019-2020 Arm Limited.
 ///
 /// SPDX-License-Identifier: MIT
 ///