diff --git a/README.md b/README.md
index 9637ad3..f129b79 100644
--- a/README.md
+++ b/README.md
@@ -163,7 +163,9 @@ jobs:
           app-id: ${{ vars.APP_ID }}
           private-key: ${{ secrets.PRIVATE_KEY }}
           owner: ${{ github.repository_owner }}
-          repositories: "repo1,repo2"
+          repositories: |
+            repo1
+            repo2
       - uses: peter-evans/create-or-update-comment@v3
         with:
           token: ${{ steps.app-token.outputs.token }}
@@ -302,7 +304,7 @@ steps:
 
 ### `repositories`
 
-**Optional:** Comma-separated list of repositories to grant access to.
+**Optional:** Comma or newline-separated list of repositories to grant access to.
 
 > [!NOTE]
 > If `owner` is set and `repositories` is empty, access will be scoped to all repositories in the provided repository owner's installation. If `owner` and `repositories` are empty, access will be scoped to only the current repository.
diff --git a/action.yml b/action.yml
index 09cc8fa..184c59f 100644
--- a/action.yml
+++ b/action.yml
@@ -23,7 +23,7 @@ inputs:
     description: "The owner of the GitHub App installation (defaults to current repository owner)"
     required: false
   repositories:
-    description: "Repositories to install the GitHub App on (defaults to current repository if owner is unset)"
+    description: "Comma or newline-separated list of repositories to install the GitHub App on (defaults to current repository if owner is unset)"
     required: false
   skip-token-revoke:
     description: "If truthy, the token will not be revoked when the current job is complete"
diff --git a/dist/main.cjs b/dist/main.cjs
index 515e8be..eb2283b 100644
--- a/dist/main.cjs
+++ b/dist/main.cjs
@@ -39700,33 +39700,35 @@ async function pRetry(input, options) {
 // lib/main.js
 async function main(appId2, privateKey2, owner2, repositories2, core3, createAppAuth2, request2, skipTokenRevoke2) {
   let parsedOwner = "";
-  let parsedRepositoryNames = "";
-  if (!owner2 && !repositories2) {
-    [parsedOwner, parsedRepositoryNames] = String(
+  let parsedRepositoryNames = [];
+  if (!owner2 && repositories2.length === 0) {
+    const [owner3, repo] = String(
       process.env.GITHUB_REPOSITORY
     ).split("/");
+    parsedOwner = owner3;
+    parsedRepositoryNames = [repo];
     core3.info(
-      `owner and repositories not set, creating token for the current repository ("${parsedRepositoryNames}")`
+      `owner and repositories not set, creating token for the current repository ("${repo}")`
     );
   }
-  if (owner2 && !repositories2) {
+  if (owner2 && repositories2.length === 0) {
     parsedOwner = owner2;
     core3.info(
       `repositories not set, creating token for all repositories for given owner "${owner2}"`
     );
   }
-  if (!owner2 && repositories2) {
+  if (!owner2 && repositories2.length > 0) {
     parsedOwner = String(process.env.GITHUB_REPOSITORY_OWNER);
     parsedRepositoryNames = repositories2;
     core3.info(
-      `owner not set, creating owner for given repositories "${repositories2}" in current owner ("${parsedOwner}")`
+      `owner not set, creating owner for given repositories "${repositories2.join(",")}" in current owner ("${parsedOwner}")`
     );
   }
-  if (owner2 && repositories2) {
+  if (owner2 && repositories2.length > 0) {
     parsedOwner = owner2;
     parsedRepositoryNames = repositories2;
     core3.info(
-      `owner and repositories set, creating token for repositories "${repositories2}" owned by "${owner2}"`
+      `owner and repositories set, creating token for repositories "${repositories2.join(",")}" owned by "${owner2}"`
     );
   }
   const auth5 = createAppAuth2({
@@ -39735,11 +39737,11 @@ async function main(appId2, privateKey2, owner2, repositories2, core3, createApp
     request: request2
   });
   let authentication, installationId, appSlug;
-  if (parsedRepositoryNames) {
+  if (parsedRepositoryNames.length > 0) {
     ({ authentication, installationId, appSlug } = await pRetry(() => getTokenFromRepository(request2, auth5, parsedOwner, parsedRepositoryNames), {
       onFailedAttempt: (error) => {
         core3.info(
-          `Failed to create token for "${parsedRepositoryNames}" (attempt ${error.attemptNumber}): ${error.message}`
+          `Failed to create token for "${parsedRepositoryNames.join(",")}" (attempt ${error.attemptNumber}): ${error.message}`
         );
       },
       retries: 3
@@ -39789,7 +39791,7 @@ async function getTokenFromOwner(request2, auth5, parsedOwner) {
 async function getTokenFromRepository(request2, auth5, parsedOwner, parsedRepositoryNames) {
   const response = await request2("GET /repos/{owner}/{repo}/installation", {
     owner: parsedOwner,
-    repo: parsedRepositoryNames.split(",")[0],
+    repo: parsedRepositoryNames[0],
     request: {
       hook: auth5.hook
     }
@@ -39797,7 +39799,7 @@ async function getTokenFromRepository(request2, auth5, parsedOwner, parsedReposi
   const authentication = await auth5({
     type: "installation",
     installationId: response.data.id,
-    repositoryNames: parsedRepositoryNames.split(",")
+    repositoryNames: parsedRepositoryNames
   });
   const installationId = response.data.id;
   const appSlug = response.data["app_slug"];
@@ -39847,7 +39849,7 @@ if (!privateKey) {
   throw new Error("Input required and not supplied: private-key");
 }
 var owner = import_core2.default.getInput("owner");
-var repositories = import_core2.default.getInput("repositories");
+var repositories = import_core2.default.getInput("repositories").split(/[\n,]+/).map((s) => s.trim()).filter((x) => x !== "");
 var skipTokenRevoke = Boolean(
   import_core2.default.getInput("skip-token-revoke") || import_core2.default.getInput("skip_token_revoke")
 );
diff --git a/lib/main.js b/lib/main.js
index 97443c0..bc15f95 100644
--- a/lib/main.js
+++ b/lib/main.js
@@ -5,7 +5,7 @@ import pRetry from "p-retry";
  * @param {string} appId
  * @param {string} privateKey
  * @param {string} owner
- * @param {string} repositories
+ * @param {string[]} repositories
  * @param {import("@actions/core")} core
  * @param {import("@octokit/auth-app").createAppAuth} createAppAuth
  * @param {import("@octokit/request").request} request
@@ -22,21 +22,23 @@ export async function main(
   skipTokenRevoke
 ) {
   let parsedOwner = "";
-  let parsedRepositoryNames = "";
+  let parsedRepositoryNames = [];
 
   // If neither owner nor repositories are set, default to current repository
-  if (!owner && !repositories) {
-    [parsedOwner, parsedRepositoryNames] = String(
+  if (!owner && repositories.length === 0) {
+    const [owner, repo] = String(
       process.env.GITHUB_REPOSITORY
     ).split("/");
+    parsedOwner = owner;
+    parsedRepositoryNames = [repo];
 
     core.info(
-      `owner and repositories not set, creating token for the current repository ("${parsedRepositoryNames}")`
+      `owner and repositories not set, creating token for the current repository ("${repo}")`
     );
   }
 
   // If only an owner is set, default to all repositories from that owner
-  if (owner && !repositories) {
+  if (owner && repositories.length === 0) {
     parsedOwner = owner;
 
     core.info(
@@ -45,22 +47,22 @@ export async function main(
   }
 
   // If repositories are set, but no owner, default to `GITHUB_REPOSITORY_OWNER`
-  if (!owner && repositories) {
+  if (!owner && repositories.length > 0) {
     parsedOwner = String(process.env.GITHUB_REPOSITORY_OWNER);
     parsedRepositoryNames = repositories;
 
     core.info(
-      `owner not set, creating owner for given repositories "${repositories}" in current owner ("${parsedOwner}")`
+      `owner not set, creating owner for given repositories "${repositories.join(',')}" in current owner ("${parsedOwner}")`
     );
   }
 
   // If both owner and repositories are set, use those values
-  if (owner && repositories) {
+  if (owner && repositories.length > 0) {
     parsedOwner = owner;
     parsedRepositoryNames = repositories;
 
     core.info(
-      `owner and repositories set, creating token for repositories "${repositories}" owned by "${owner}"`
+      `owner and repositories set, creating token for repositories "${repositories.join(',')}" owned by "${owner}"`
     );
   }
 
@@ -73,11 +75,11 @@ export async function main(
   let authentication, installationId, appSlug;
   // If at least one repository is set, get installation ID from that repository
 
-  if (parsedRepositoryNames) {
+  if (parsedRepositoryNames.length > 0) {
     ({ authentication, installationId, appSlug } = await pRetry(() => getTokenFromRepository(request, auth, parsedOwner, parsedRepositoryNames), {
       onFailedAttempt: (error) => {
         core.info(
-          `Failed to create token for "${parsedRepositoryNames}" (attempt ${error.attemptNumber}): ${error.message}`
+          `Failed to create token for "${parsedRepositoryNames.join(',')}" (attempt ${error.attemptNumber}): ${error.message}`
         );
       },
       retries: 3,
@@ -144,7 +146,7 @@ async function getTokenFromRepository(request, auth, parsedOwner, parsedReposito
   // https://docs.github.com/rest/apps/apps?apiVersion=2022-11-28#get-a-repository-installation-for-the-authenticated-app
   const response = await request("GET /repos/{owner}/{repo}/installation", {
     owner: parsedOwner,
-    repo: parsedRepositoryNames.split(",")[0],
+    repo: parsedRepositoryNames[0],
     request: {
       hook: auth.hook,
     },
@@ -154,11 +156,11 @@ async function getTokenFromRepository(request, auth, parsedOwner, parsedReposito
   const authentication = await auth({
     type: "installation",
     installationId: response.data.id,
-    repositoryNames: parsedRepositoryNames.split(","),
+    repositoryNames: parsedRepositoryNames,
   });
 
   const installationId = response.data.id;
   const appSlug = response.data['app_slug'];
 
   return { authentication, installationId, appSlug };
- }
\ No newline at end of file
+}
diff --git a/main.js b/main.js
index b4d919d..8011b51 100644
--- a/main.js
+++ b/main.js
@@ -25,7 +25,10 @@ if (!privateKey) {
   throw new Error("Input required and not supplied: private-key");
 }
 const owner = core.getInput("owner");
-const repositories = core.getInput("repositories");
+const repositories = core.getInput("repositories")
+  .split(/[\n,]+/)
+  .map(s => s.trim())
+  .filter(x => x !== '');
 
 const skipTokenRevoke = Boolean(
   core.getInput("skip-token-revoke") || core.getInput("skip_token_revoke")
diff --git a/package-lock.json b/package-lock.json
index fef3933..332bbb1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "create-github-app-token",
-  "version": "1.10.3",
+  "version": "1.10.4",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "create-github-app-token",
-      "version": "1.10.3",
+      "version": "1.10.4",
       "license": "MIT",
       "dependencies": {
         "@actions/core": "^1.10.1",
diff --git a/tests/main-token-get-owner-set-repo-set-to-many-newline.test.js b/tests/main-token-get-owner-set-repo-set-to-many-newline.test.js
new file mode 100644
index 0000000..ad03c67
--- /dev/null
+++ b/tests/main-token-get-owner-set-repo-set-to-many-newline.test.js
@@ -0,0 +1,9 @@
+import { test } from "./main.js";
+
+// Verify `main` successfully obtains a token when the `owner` and `repositories` inputs are set (and the latter is a list of repos).
+await test(() => {
+  process.env.INPUT_OWNER = process.env.GITHUB_REPOSITORY_OWNER;
+  const currentRepoName = process.env.GITHUB_REPOSITORY.split("/")[1];
+  // Intentional unnecessary whitespace to test parsing to array
+  process.env.INPUT_REPOSITORIES = `\n ${currentRepoName}\ntoolkit \n\n checkout \n`;
+});
diff --git a/tests/main-token-get-owner-set-repo-set-to-many.test.js b/tests/main-token-get-owner-set-repo-set-to-many.test.js
index 173fcf4..074e53b 100644
--- a/tests/main-token-get-owner-set-repo-set-to-many.test.js
+++ b/tests/main-token-get-owner-set-repo-set-to-many.test.js
@@ -4,5 +4,6 @@ import { test } from "./main.js";
 await test(() => {
   process.env.INPUT_OWNER = process.env.GITHUB_REPOSITORY_OWNER;
   const currentRepoName = process.env.GITHUB_REPOSITORY.split("/")[1];
-  process.env.INPUT_REPOSITORIES = `${currentRepoName},toolkit`;
+  // Intentional unnecessary whitespace to test parsing to array
+  process.env.INPUT_REPOSITORIES = ` ${currentRepoName}, toolkit  ,checkout`;
 });
diff --git a/tests/snapshots/index.js.md b/tests/snapshots/index.js.md
index 023d104..76d4b78 100644
--- a/tests/snapshots/index.js.md
+++ b/tests/snapshots/index.js.md
@@ -134,6 +134,25 @@ Generated by [AVA](https://avajs.dev).
     ::save-state name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
     ::save-state name=expiresAt::2016-07-11T22:14:10Z`
 
+## main-token-get-owner-set-repo-set-to-many-newline.test.js
+
+> stderr
+
+    ''
+
+> stdout
+
+    `owner and repositories set, creating token for repositories "create-github-app-token,toolkit,checkout" owned by "actions"␊
+    ::add-mask::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ␊
+    ::set-output name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ␊
+    ::set-output name=installation-id::123456␊
+    ␊
+    ::set-output name=app-slug::github-actions␊
+    ::save-state name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ::save-state name=expiresAt::2016-07-11T22:14:10Z`
+
 ## main-token-get-owner-set-repo-set-to-many.test.js
 
 > stderr
@@ -142,7 +161,7 @@ Generated by [AVA](https://avajs.dev).
 
 > stdout
 
-    `owner and repositories set, creating token for repositories "create-github-app-token,toolkit" owned by "actions"␊
+    `owner and repositories set, creating token for repositories "create-github-app-token,toolkit,checkout" owned by "actions"␊
     ::add-mask::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
     ␊
     ::set-output name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
diff --git a/tests/snapshots/index.js.snap b/tests/snapshots/index.js.snap
index 89369aa..9956084 100644
Binary files a/tests/snapshots/index.js.snap and b/tests/snapshots/index.js.snap differ