diff --git a/Dockerfile b/Dockerfile
index 4902d2d59..ca64cfb54 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@
 #
 # pgAdmin 4 - PostgreSQL Tools
 #
-# Copyright (C) 2013 - 2018, The pgAdmin Development Team
+# Copyright (C) 2013 - 2023, The pgAdmin Development Team
 # This software is released under the PostgreSQL Licence
 #
 #########################################################################
diff --git a/Makefile b/Makefile
index d434ceaf5..06b89716c 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@
 #
 # pgAdmin 4 - PostgreSQL Tools
 #
-# Copyright (C) 2013 - 2018, The pgAdmin Development Team
+# Copyright (C) 2013 - 2023, The pgAdmin Development Team
 # This software is released under the PostgreSQL Licence
 #
 #########################################################################
diff --git a/tools/copyright_updater.py b/tools/copyright_updater.py
index f36e9ead2..a5b481b85 100644
--- a/tools/copyright_updater.py
+++ b/tools/copyright_updater.py
@@ -20,7 +20,7 @@ import codecs
 ALLOWED_FILE_EXTENSIONS = (
     ".py", ".js", ".sql", ".cpp", ".h", ".rc", ".am", ".wsgi", ".pro",
     ".plist", ".rst", ".sh", ".in", ".mako", ".ini", ".jsx", ".rtf", ".rst",
-    "LICENSE", ".ts", ".tsx"
+    "LICENSE", "Dockerfile", "Makefile", ".ts", ".tsx"
 )
 
 EXCLUDE_DIR = ("node_modules")