diff --git a/packages/ui5-task-copyright/README.md b/packages/ui5-task-copyright/README.md
index c41c954b8..7aad600b1 100644
--- a/packages/ui5-task-copyright/README.md
+++ b/packages/ui5-task-copyright/README.md
@@ -19,13 +19,13 @@ npm install ui5-task-copyright --save-dev
 
 ## Configuration options (in `$yourapp/ui5.yaml`)
 
-- copyright: `String` (via env var: `UI5_TASK_COPYRIGHT_FILE` expects file name)
-  the value of the copyright or the path to a file containing the copyright statement - if not given, the task will be skipped - the copyright can also be injected by the environment variable `UI5_TASK_COPYRIGHT_FILE` which must point to an existing file and then the copyright is extracted from this file
+- copyright: `String` (via env var: `ui5_task_copyright__file` expects file name)
+  the value of the copyright or the path to a file containing the copyright statement - if not given, the task will be skipped - the copyright can also be injected by the environment variable `ui5_task_copyright__file` which must point to an existing file and then the copyright is extracted from this file
 
-- copyrightPlaceholder: `String` (defaults to: `copyright`, env var: `UI5_TASK_COPYRIGHT_PLACEHOLDER_COPYRIGHT`)
+- copyrightPlaceholder: `String` (defaults to: `copyright`, env var: `ui5_task_copyright__placeholder_copyright`)
   the name of the copyright placeholder to check for in the copyright comments and to replace with the copyright value (will replace all hits of `${copyright}` or `@copyright@`)
 
-- currentYearPlaceholder: `String` (defaults to: `currentYear`, env var: `UI5_TASK_COPYRIGHT_PLACEHOLDER_CURRENT_YEAR`)
+- currentYearPlaceholder: `String` (defaults to: `currentYear`, env var: `ui5_task_copyright__placeholder_current_year`)
   the name of the currentYear placeholder in the copyright comments which will be replaced with the currentYear value (will replace all hits of `${currentYear}` or `@currentYear@`)
 
 - excludePatterns: `Array<String>`
diff --git a/packages/ui5-task-copyright/lib/copyright.js b/packages/ui5-task-copyright/lib/copyright.js
index a59b7583f..0fab791cb 100644
--- a/packages/ui5-task-copyright/lib/copyright.js
+++ b/packages/ui5-task-copyright/lib/copyright.js
@@ -13,7 +13,7 @@ const { XMLParser } = require("fast-xml-parser");
  */
 module.exports = async ({ log, workspace, options }) => {
 	// disable task if no copyright is configured
-	if (!options?.configuration?.copyright && !process.env.UI5_TASK_COPYRIGHT_FILE) {
+	if (!options?.configuration?.copyright && !process.env.ui5_task_copyright__file) {
 		return Promise.resolve();
 	}
 
@@ -27,13 +27,13 @@ module.exports = async ({ log, workspace, options }) => {
 	);
 
 	// the environment variable UI5_TASK_COPYRIGHT_PLACEHOLDER_* can be used to override the placeholders
-	if (process.env.UI5_TASK_COPYRIGHT_PLACEHOLDER_COPYRIGHT) {
-		copyrightPlaceholder = process.env.UI5_TASK_COPYRIGHT_PLACEHOLDER_COPYRIGHT;
-		log.info(`Using environment variable UI5_TASK_COPYRIGHT_PLACEHOLDER_COPYRIGHT: ${copyrightPlaceholder}`);
+	if (process.env.ui5_task_copyright__placeholder_copyright) {
+		copyrightPlaceholder = process.env.ui5_task_copyright__placeholder_copyright;
+		log.info(`Using environment variable ui5_task_copyright__placeholder_copyright: ${copyrightPlaceholder}`);
 	}
-	if (process.env.UI5_TASK_COPYRIGHT_PLACEHOLDER_CURRENT_YEAR) {
-		currentYearPlaceholder = process.env.UI5_TASK_COPYRIGHT_PLACEHOLDER_CURRENT_YEAR;
-		log.info(`Using environment variable UI5_TASK_COPYRIGHT_PLACEHOLDER_CURRENT_YEAR: ${currentYearPlaceholder}`);
+	if (process.env.ui5_task_copyright__placeholder_current_year) {
+		currentYearPlaceholder = process.env.ui5_task_copyright__placeholder_current_year;
+		log.info(`Using environment variable ui5_task_copyright__placeholder_current_year: ${currentYearPlaceholder}`);
 	}
 
 	// only words are allowed as placeholders
@@ -63,10 +63,10 @@ module.exports = async ({ log, workspace, options }) => {
 		options.configuration
 	);
 
-	// the environment variable UI5_TASK_COPYRIGHT_FILE can be used to specify a file path for the copyright
-	if (process.env.UI5_TASK_COPYRIGHT_FILE) {
-		copyright = process.env.UI5_TASK_COPYRIGHT_FILE;
-		log.info(`Using environment variable UI5_TASK_COPYRIGHT_FILE: ${copyright}`);
+	// the environment variable ui5_task_copyright__file can be used to specify a file path for the copyright
+	if (process.env.ui5_task_copyright__file) {
+		copyright = process.env.ui5_task_copyright__file;
+		log.info(`Using environment variable ui5_task_copyright__file: ${copyright}`);
 	}
 
 	// check if the file exists (if copyright is a file path)
diff --git a/packages/ui5-task-copyright/test/copyright.test.js b/packages/ui5-task-copyright/test/copyright.test.js
index 8a020de6c..8a3239413 100644
--- a/packages/ui5-task-copyright/test/copyright.test.js
+++ b/packages/ui5-task-copyright/test/copyright.test.js
@@ -102,8 +102,8 @@ test("Copyright from file (env)", async (t) => {
 		shell: true,
 		cwd: path.resolve(__dirname, "../../../showcases/ui5-tsapp"),
 		env: Object.assign({}, process.env, {
-			UI5_TASK_COPYRIGHT_FILE: "./copyright-alt.txt",
-			UI5_TASK_COPYRIGHT_PLACEHOLDER_CURRENT_YEAR: "altCurrentYear",
+			ui5_task_copyright__file: "./copyright-alt.txt",
+			ui5_task_copyright__placeholder_current_year: "altCurrentYear",
 		}),
 	});