diff --git a/changelog_unreleased/typescript/10945.md b/changelog_unreleased/typescript/10945.md
new file mode 100644
index 000000000000..f7ac515acf0e
--- /dev/null
+++ b/changelog_unreleased/typescript/10945.md
@@ -0,0 +1,26 @@
+#### Support TypeScript 4.3 (#10945 by @sosukesuzuki)
+
+##### [`override` modifiers in class elements](https://devblogs.microsoft.com/typescript/announcing-typescript-4-3-rc/#override-and-the-noimplicitoverride-flag)
+
+```ts
+class Foo extends  {
+  override method() {}
+}
+```
+
+##### [static index signatures (`[key: KeyType]: ValueType`) in classes](https://devblogs.microsoft.com/typescript/announcing-typescript-4-3-rc/#static-index-signatures)
+
+```ts
+class Foo {
+  static [key: string]: Bar;
+}
+```
+
+##### [`get` / `set` in type declarations](https://devblogs.microsoft.com/typescript/announcing-typescript-4-3-rc/#separate-write-types-on-properties)
+
+```ts
+interface Foo {
+  set foo(value);
+  get foo(): string;
+}
+```
diff --git a/package.json b/package.json
index b185c756c00e..a59506c2bcfc 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
     "@babel/parser": "7.14.3",
     "@glimmer/syntax": "0.79.2",
     "@iarna/toml": "2.2.5",
-    "@typescript-eslint/typescript-estree": "4.24.0",
+    "@typescript-eslint/typescript-estree": "4.25.0",
     "angular-estree-parser": "2.3.0",
     "angular-html-parser": "1.8.0",
     "camelcase": "6.2.0",
@@ -79,7 +79,7 @@
     "semver": "7.3.5",
     "string-width": "4.2.2",
     "strip-ansi": "6.0.0",
-    "typescript": "4.2.4",
+    "typescript": "4.3.1-rc",
     "unicode-regex": "3.0.0",
     "unified": "9.2.1",
     "vnopts": "1.0.2",
diff --git a/tests/format/misc/typescript-babel-only/__snapshots__/jsfmt.spec.js.snap b/tests/format/misc/typescript-babel-only/__snapshots__/jsfmt.spec.js.snap
index ecaec1d3d738..45f2edd1376c 100644
--- a/tests/format/misc/typescript-babel-only/__snapshots__/jsfmt.spec.js.snap
+++ b/tests/format/misc/typescript-babel-only/__snapshots__/jsfmt.spec.js.snap
@@ -60,68 +60,6 @@ class Bar {
 ================================================================================
 `;
 
-exports[`ts-4.3-override-modifier.ts format 1`] = `
-====================================options=====================================
-parsers: ["babel-ts"]
-printWidth: 80
-                                                                                | printWidth
-=====================================input======================================
-class MyClass extends BaseClass {
-  override show() {}
-  public override show() {}
-  override size = 5;
-  override readonly size = 5;
-}
-
-=====================================output=====================================
-class MyClass extends BaseClass {
-  override show() {}
-  public override show() {}
-  override size = 5;
-  override readonly size = 5;
-}
-
-================================================================================
-`;
-
-exports[`ts4.3-type-members-get-set.ts format 1`] = `
-====================================options=====================================
-parsers: ["babel-ts"]
-printWidth: 80
-                                                                                | printWidth
-=====================================input======================================
-interface Foo {
-  get foo(): string;
-  set bar(v);
-}
-
-type Foo = {
-  get foo(): string;
-  set bar(v);
-}
-
-interface Foo {
-  set bar(foo: string);
-}
-
-=====================================output=====================================
-interface Foo {
-  get foo(): string;
-  set bar(v);
-}
-
-type Foo = {
-  get foo(): string;
-  set bar(v);
-};
-
-interface Foo {
-  set bar(foo: string);
-}
-
-================================================================================
-`;
-
 exports[`tuple-labeled-ts.ts format 1`] = `
 ====================================options=====================================
 parsers: ["babel-ts"]
diff --git a/tests/format/typescript/override-modifiers/__snapshots__/jsfmt.spec.js.snap b/tests/format/typescript/override-modifiers/__snapshots__/jsfmt.spec.js.snap
new file mode 100644
index 000000000000..5352d1ceae7f
--- /dev/null
+++ b/tests/format/typescript/override-modifiers/__snapshots__/jsfmt.spec.js.snap
@@ -0,0 +1,25 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`override-modifier.ts format 1`] = `
+====================================options=====================================
+parsers: ["typescript"]
+printWidth: 80
+                                                                                | printWidth
+=====================================input======================================
+class MyClass extends BaseClass {
+  override show() {}
+  public override show() {}
+  override size = 5;
+  override readonly size = 5;
+}
+
+=====================================output=====================================
+class MyClass extends BaseClass {
+  override show() {}
+  public override show() {}
+  override size = 5;
+  override readonly size = 5;
+}
+
+================================================================================
+`;
diff --git a/tests/format/typescript/override-modifiers/jsfmt.spec.js b/tests/format/typescript/override-modifiers/jsfmt.spec.js
new file mode 100644
index 000000000000..2ea3bb6eb2e4
--- /dev/null
+++ b/tests/format/typescript/override-modifiers/jsfmt.spec.js
@@ -0,0 +1 @@
+run_spec(__dirname, ["typescript"]);
diff --git a/tests/format/misc/typescript-babel-only/ts-4.3-override-modifier.ts b/tests/format/typescript/override-modifiers/override-modifier.ts
similarity index 100%
rename from tests/format/misc/typescript-babel-only/ts-4.3-override-modifier.ts
rename to tests/format/typescript/override-modifiers/override-modifier.ts
diff --git a/tests/format/typescript/type-member-get-set/__snapshots__/jsfmt.spec.js.snap b/tests/format/typescript/type-member-get-set/__snapshots__/jsfmt.spec.js.snap
new file mode 100644
index 000000000000..f034192f4269
--- /dev/null
+++ b/tests/format/typescript/type-member-get-set/__snapshots__/jsfmt.spec.js.snap
@@ -0,0 +1,39 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`type-member-get-set.ts format 1`] = `
+====================================options=====================================
+parsers: ["typescript"]
+printWidth: 80
+                                                                                | printWidth
+=====================================input======================================
+interface Foo {
+  get foo(): string;
+  set bar(v);
+}
+
+type Foo = {
+  get foo(): string;
+  set bar(v);
+}
+
+interface Foo {
+  set bar(foo: string);
+}
+
+=====================================output=====================================
+interface Foo {
+  get foo(): string;
+  set bar(v);
+}
+
+type Foo = {
+  get foo(): string;
+  set bar(v);
+};
+
+interface Foo {
+  set bar(foo: string);
+}
+
+================================================================================
+`;
diff --git a/tests/format/typescript/type-member-get-set/jsfmt.spec.js b/tests/format/typescript/type-member-get-set/jsfmt.spec.js
new file mode 100644
index 000000000000..2ea3bb6eb2e4
--- /dev/null
+++ b/tests/format/typescript/type-member-get-set/jsfmt.spec.js
@@ -0,0 +1 @@
+run_spec(__dirname, ["typescript"]);
diff --git a/tests/format/misc/typescript-babel-only/ts4.3-type-members-get-set.ts b/tests/format/typescript/type-member-get-set/type-member-get-set.ts
similarity index 100%
rename from tests/format/misc/typescript-babel-only/ts4.3-type-members-get-set.ts
rename to tests/format/typescript/type-member-get-set/type-member-get-set.ts
diff --git a/yarn.lock b/yarn.lock
index 7a7a177eecf5..ee8d65fa1a7e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1660,10 +1660,10 @@
   resolved "https://registry.yarnpkg.com/@typescript-eslint/types/-/types-4.19.0.tgz#5181d5d2afd02e5b8f149ebb37ffc8bd7b07a568"
   integrity sha512-A4iAlexVvd4IBsSTNxdvdepW0D4uR/fwxDrKUa+iEY9UWvGREu2ZyB8ylTENM1SH8F7bVC9ac9+si3LWNxcBuA==
 
-"@typescript-eslint/types@4.24.0":
-  version "4.24.0"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/types/-/types-4.24.0.tgz#6d0cca2048cbda4e265e0c4db9c2a62aaad8228c"
-  integrity sha512-tkZUBgDQKdvfs8L47LaqxojKDE+mIUmOzdz7r+u+U54l3GDkTpEbQ1Jp3cNqqAU9vMUCBA1fitsIhm7yN0vx9Q==
+"@typescript-eslint/types@4.25.0":
+  version "4.25.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/types/-/types-4.25.0.tgz#0e444a5c5e3c22d7ffa5e16e0e60510b3de5af87"
+  integrity sha512-+CNINNvl00OkW6wEsi32wU5MhHti2J25TJsJJqgQmJu3B3dYDBcmOxcE5w9cgoM13TrdE/5ND2HoEnBohasxRQ==
 
 "@typescript-eslint/typescript-estree@4.19.0":
   version "4.19.0"
@@ -1678,13 +1678,13 @@
     semver "^7.3.2"
     tsutils "^3.17.1"
 
-"@typescript-eslint/typescript-estree@4.24.0":
-  version "4.24.0"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-4.24.0.tgz#b49249679a98014d8b03e8d4b70864b950e3c90f"
-  integrity sha512-kBDitL/by/HK7g8CYLT7aKpAwlR8doshfWz8d71j97n5kUa5caHWvY0RvEUEanL/EqBJoANev8Xc/mQ6LLwXGA==
+"@typescript-eslint/typescript-estree@4.25.0":
+  version "4.25.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-4.25.0.tgz#942e4e25888736bff5b360d9b0b61e013d0cfa25"
+  integrity sha512-1B8U07TGNAFMxZbSpF6jqiDs1cVGO0izVkf18Q/SPcUAc9LhHxzvSowXDTvkHMWUVuPpagupaW63gB6ahTXVlg==
   dependencies:
-    "@typescript-eslint/types" "4.24.0"
-    "@typescript-eslint/visitor-keys" "4.24.0"
+    "@typescript-eslint/types" "4.25.0"
+    "@typescript-eslint/visitor-keys" "4.25.0"
     debug "^4.1.1"
     globby "^11.0.1"
     is-glob "^4.0.1"
@@ -1699,12 +1699,12 @@
     "@typescript-eslint/types" "4.19.0"
     eslint-visitor-keys "^2.0.0"
 
-"@typescript-eslint/visitor-keys@4.24.0":
-  version "4.24.0"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/visitor-keys/-/visitor-keys-4.24.0.tgz#a8fafdc76cad4e04a681a945fbbac4e35e98e297"
-  integrity sha512-4ox1sjmGHIxjEDBnMCtWFFhErXtKA1Ec0sBpuz0fqf3P+g3JFGyTxxbF06byw0FRsPnnbq44cKivH7Ks1/0s6g==
+"@typescript-eslint/visitor-keys@4.25.0":
+  version "4.25.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/visitor-keys/-/visitor-keys-4.25.0.tgz#863e7ed23da4287c5b469b13223255d0fde6aaa7"
+  integrity sha512-AmkqV9dDJVKP/TcZrbf6s6i1zYXt5Hl8qOLrRDTFfRNae4+LB8A4N3i+FLZPW85zIxRy39BgeWOfMS3HoH5ngg==
   dependencies:
-    "@typescript-eslint/types" "4.24.0"
+    "@typescript-eslint/types" "4.25.0"
     eslint-visitor-keys "^2.0.0"
 
 "@webassemblyjs/ast@1.11.0":
@@ -3129,6 +3129,7 @@ eslint-plugin-jest@24.3.6:
 
 "eslint-plugin-prettier-internal-rules@link:scripts/tools/eslint-plugin-prettier-internal-rules":
   version "0.0.0"
+  uid ""
 
 eslint-plugin-react@7.23.2:
   version "7.23.2"
@@ -6941,10 +6942,10 @@ typedarray-to-buffer@^3.1.5:
   dependencies:
     is-typedarray "^1.0.0"
 
-typescript@4.2.4:
-  version "4.2.4"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.2.4.tgz#8610b59747de028fda898a8aef0e103f156d0961"
-  integrity sha512-V+evlYHZnQkaz8TRBuxTA92yZBPotr5H+WhQ7bD3hZUndx5tGOa1fuCgeSjxAzM1RiN5IzvadIXTVefuuwZCRg==
+typescript@4.3.1-rc:
+  version "4.3.1-rc"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.3.1-rc.tgz#925149c8d8514e20a6bd8d4bd7f42adac67ab59c"
+  integrity sha512-L3uJ0gcntaRaKni9aV2amYB+pCDVodKe/B5+IREyvtKGsDOF7cYjchHb/B894skqkgD52ykRuWatIZMqEsHIqA==
 
 unherit@^1.0.4:
   version "1.1.3"