diff --git a/action.yml b/action.yml
index aab57bc..38b6dc7 100644
--- a/action.yml
+++ b/action.yml
@@ -7,18 +7,10 @@ branding:
 inputs:
   app-id:
     description: "GitHub App ID"
-    required: false # TODO: When 'app_id' is removed, make 'app-id' required
-  app_id:
-    description: "GitHub App ID"
-    required: false
-    deprecationMessage: "'app_id' is deprecated and will be removed in a future version. Use 'app-id' instead."
+    required: true
   private-key:
     description: "GitHub App private key"
-    required: false # TODO: When 'private_key' is removed, make 'private-key' required
-  private_key:
-    description: "GitHub App private key"
-    required: false
-    deprecationMessage: "'private_key' is deprecated and will be removed in a future version. Use 'private-key' instead."
+    required: true
   owner:
     description: "The owner of the GitHub App installation (defaults to current repository owner)"
     required: false
@@ -28,10 +20,6 @@ inputs:
   skip-token-revoke:
     description: "If truthy, the token will not be revoked when the current job is complete"
     required: false
-  skip_token_revoke:
-    description: "If truthy, the token will not be revoked when the current job is complete"
-    required: false
-    deprecationMessage: "'skip_token_revoke' is deprecated and will be removed in a future version. Use 'skip-token-revoke' instead."
   # Make GitHub API configurable to support non-GitHub Cloud use cases
   # see https://github.com/actions/create-github-app-token/issues/77
   github-api-url:
diff --git a/lib/post.js b/lib/post.js
index 9b294ae..f21174d 100644
--- a/lib/post.js
+++ b/lib/post.js
@@ -5,9 +5,7 @@
  * @param {import("@octokit/request").request} request
  */
 export async function post(core, request) {
-  const skipTokenRevoke = Boolean(
-    core.getInput("skip-token-revoke") || core.getInput("skip_token_revoke")
-  );
+  const skipTokenRevoke = Boolean(core.getInput("skip-token-revoke"));
 
   if (skipTokenRevoke) {
     core.info("Token revocation was skipped");
@@ -35,8 +33,7 @@ export async function post(core, request) {
     });
     core.info("Token revoked");
   } catch (error) {
-    core.warning(
-      `Token revocation failed: ${error.message}`)
+    core.warning(`Token revocation failed: ${error.message}`);
   }
 }
 
diff --git a/main.js b/main.js
index 81b7767..ac3a7c5 100644
--- a/main.js
+++ b/main.js
@@ -3,9 +3,9 @@
 import core from "@actions/core";
 import { createAppAuth } from "@octokit/auth-app";
 
+import { getPermissionsFromInputs } from "./lib/get-permissions-from-inputs.js";
 import { main } from "./lib/main.js";
 import request from "./lib/request.js";
-import { getPermissionsFromInputs } from "./lib/get-permissions-from-inputs.js";
 
 if (!process.env.GITHUB_REPOSITORY) {
   throw new Error("GITHUB_REPOSITORY missing, must be set to '<owner>/<repo>'");
@@ -15,16 +15,8 @@ if (!process.env.GITHUB_REPOSITORY_OWNER) {
   throw new Error("GITHUB_REPOSITORY_OWNER missing, must be set to '<owner>'");
 }
 
-const appId = core.getInput("app-id") || core.getInput("app_id");
-if (!appId) {
-  // The 'app_id' input was previously required, but it and 'app-id' are both optional now, until the former is removed. Still, we want to ensure that at least one of them is set.
-  throw new Error("Input required and not supplied: app-id");
-}
-const privateKey = core.getInput("private-key") || core.getInput("private_key");
-if (!privateKey) {
-  // The 'private_key' input was previously required, but it and 'private-key' are both optional now, until the former is removed. Still, we want to ensure that at least one of them is set.
-  throw new Error("Input required and not supplied: private-key");
-}
+const appId = core.getInput("app-id");
+const privateKey = core.getInput("private-key");
 const owner = core.getInput("owner");
 const repositories = core
   .getInput("repositories")
@@ -32,9 +24,7 @@ const repositories = core
   .map((s) => s.trim())
   .filter((x) => x !== "");
 
-const skipTokenRevoke = Boolean(
-  core.getInput("skip-token-revoke") || core.getInput("skip_token_revoke"),
-);
+const skipTokenRevoke = Boolean(core.getInput("skip-token-revoke"));
 
 const permissions = getPermissionsFromInputs(process.env);
 
diff --git a/package-lock.json b/package-lock.json
index 42a7c74..954ed1f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "create-github-app-token",
-  "version": "1.11.6",
+  "version": "1.12.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "create-github-app-token",
-      "version": "1.11.6",
+      "version": "1.12.0",
       "license": "MIT",
       "dependencies": {
         "@actions/core": "^1.11.1",
diff --git a/tests/main-missing-app-id.test.js b/tests/main-missing-app-id.test.js
deleted file mode 100644
index 9382b44..0000000
--- a/tests/main-missing-app-id.test.js
+++ /dev/null
@@ -1,9 +0,0 @@
-process.env.GITHUB_REPOSITORY_OWNER = "actions";
-process.env.GITHUB_REPOSITORY = "actions/create-github-app-token";
-
-// Verify `main` exits with an error when neither the `app-id` nor `app_id` input is set.
-try {
-  await import("../main.js");
-} catch (error) {
-  console.error(error.message);
-}
diff --git a/tests/main-missing-private-key.test.js b/tests/main-missing-private-key.test.js
deleted file mode 100644
index a78b1c7..0000000
--- a/tests/main-missing-private-key.test.js
+++ /dev/null
@@ -1,10 +0,0 @@
-process.env.GITHUB_REPOSITORY_OWNER = "actions";
-process.env.GITHUB_REPOSITORY = "actions/create-github-app-token";
-process.env["INPUT_APP-ID"] = "123456";
-
-// Verify `main` exits with an error when neither the `private-key` nor `private_key` input is set.
-try {
-  await import("../main.js");
-} catch (error) {
-  console.error(error.message);
-}
diff --git a/tests/snapshots/index.js.md b/tests/snapshots/index.js.md
index f085f87..eeb7387 100644
--- a/tests/snapshots/index.js.md
+++ b/tests/snapshots/index.js.md
@@ -12,9 +12,7 @@ Generated by [AVA](https://avajs.dev).
 
 > stdout
 
-    `app_id — 'app_id' is deprecated and will be removed in a future version. Use 'app-id' instead.␊
-    private_key — 'private_key' is deprecated and will be removed in a future version. Use 'private-key' instead.␊
-    skip_token_revoke — 'skip_token_revoke' is deprecated and will be removed in a future version. Use 'skip-token-revoke' instead.`
+    ''
 
 ## main-custom-github-api-url.test.js
 
@@ -39,16 +37,6 @@ Generated by [AVA](https://avajs.dev).
     POST /api/v3/app/installations/123456/access_tokens␊
     {"repositories":["create-github-app-token"]}`
 
-## main-missing-app-id.test.js
-
-> stderr
-
-    'Input required and not supplied: app-id'
-
-> stdout
-
-    ''
-
 ## main-missing-owner.test.js
 
 > stderr
@@ -59,16 +47,6 @@ Generated by [AVA](https://avajs.dev).
 
     ''
 
-## main-missing-private-key.test.js
-
-> stderr
-
-    'Input required and not supplied: private-key'
-
-> stdout
-
-    ''
-
 ## main-missing-repository.test.js
 
 > stderr
diff --git a/tests/snapshots/index.js.snap b/tests/snapshots/index.js.snap
index 2291b3a..14f1a6c 100644
Binary files a/tests/snapshots/index.js.snap and b/tests/snapshots/index.js.snap differ