diff --git a/changelog_unreleased/flow/16268.md b/changelog_unreleased/flow/16268.md
new file mode 100644
index 000000000..1f6270c09
--- /dev/null
+++ b/changelog_unreleased/flow/16268.md
@@ -0,0 +1,21 @@
+#### Support big int Flow Enums (#16268 by @gkz)
+
+Adds support for big int [Flow Enums](https://flow.org/en/docs/enums/).
+
+<!-- prettier-ignore -->
+```jsx
+// Input
+enum E {
+  A = 0n,
+  B = 1n,
+}
+
+// Prettier stable
+// error
+
+// Prettier main
+enum E {
+  A = 0n,
+  B = 1n,
+}
+```
diff --git a/package.json b/package.json
index 704ad9b27..deee7c39a 100644
--- a/package.json
+++ b/package.json
@@ -60,11 +60,11 @@
     "fast-json-stable-stringify": "2.1.0",
     "file-entry-cache": "7.0.2",
     "find-cache-dir": "5.0.0",
-    "flow-parser": "0.233.0",
+    "flow-parser": "0.235.1",
     "get-east-asian-width": "1.2.0",
     "get-stdin": "9.0.0",
     "graphql": "16.8.1",
-    "hermes-parser": "0.20.1",
+    "hermes-parser": "0.21.0",
     "html-element-attributes": "3.4.0",
     "html-tag-names": "2.1.0",
     "html-ua-styles": "0.0.6",
diff --git a/src/language-js/print/enum.js b/src/language-js/print/enum.js
index 0390528c0..9e1f6d380 100644
--- a/src/language-js/print/enum.js
+++ b/src/language-js/print/enum.js
@@ -8,6 +8,7 @@ function printEnumMembers(path, print, options) {
 /*
 - `EnumBooleanMember`(flow)
 - `EnumNumberMember`(flow)
+- `EnumBigIntMember`(flow)
 - `EnumStringMember`(flow)
 - `EnumDefaultedMember`(flow)
 - `TSEnumMember`(TypeScript)
@@ -43,6 +44,7 @@ function printEnumMember(path, print) {
 /*
 - `EnumBooleanBody`(flow)
 - `EnumNumberBody`(flow)
+- `EnumBigIntBody`(flow)
 - `EnumStringBody`(flow)
 - `EnumSymbolBody`(flow)
 */
@@ -58,6 +60,9 @@ function printEnumBody(path, print, options) {
       case "EnumNumberBody":
         type = "number";
         break;
+      case "EnumBigIntBody":
+        type = "bigint";
+        break;
       case "EnumStringBody":
         type = "string";
         break;
diff --git a/src/language-js/print/flow.js b/src/language-js/print/flow.js
index 043569138..4565c5261 100644
--- a/src/language-js/print/flow.js
+++ b/src/language-js/print/flow.js
@@ -163,12 +163,14 @@ function printFlow(path, options, print) {
 
     case "EnumBooleanBody":
     case "EnumNumberBody":
+    case "EnumBigIntBody":
     case "EnumStringBody":
     case "EnumSymbolBody":
       return printEnumBody(path, print, options);
 
     case "EnumBooleanMember":
     case "EnumNumberMember":
+    case "EnumBigIntMember":
     case "EnumStringMember":
     case "EnumDefaultedMember":
       return printEnumMember(path, print);
diff --git a/src/language-js/print/object.js b/src/language-js/print/object.js
index 83f6e532e..0121440c9 100644
--- a/src/language-js/print/object.js
+++ b/src/language-js/print/object.js
@@ -35,6 +35,7 @@ function printObject(path, options, print) {
     node.type === "TSEnumDeclaration" ||
     node.type === "EnumBooleanBody" ||
     node.type === "EnumNumberBody" ||
+    node.type === "EnumBigIntBody" ||
     node.type === "EnumStringBody" ||
     node.type === "EnumSymbolBody";
   const fields = [
diff --git a/tests/format/flow/enums/__snapshots__/format.test.js.snap b/tests/format/flow/enums/__snapshots__/format.test.js.snap
index 4acf0eb8d..aacb702ab 100644
--- a/tests/format/flow/enums/__snapshots__/format.test.js.snap
+++ b/tests/format/flow/enums/__snapshots__/format.test.js.snap
@@ -1,5 +1,79 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
+exports[`enum-bigint-explicit.js - {"trailingComma":"all"} [babel-flow] format 1`] = `
+"Enum \`E\` has type \`bigint\`, so the initializer of \`A\` needs to be a bigint literal. (4:7)
+  2 |
+  3 | enum E of bigint {
+> 4 |   A = 0n,
+    |       ^
+  5 |   B = 1n,
+  6 | }
+  7 |
+Cause: Enum \`E\` has type \`bigint\`, so the initializer of \`A\` needs to be a bigint literal. (4:6)"
+`;
+
+exports[`enum-bigint-explicit.js - {"trailingComma":"all"} format 1`] = `
+====================================options=====================================
+parsers: ["flow"]
+printWidth: 80
+trailingComma: "all"
+                                                                                | printWidth
+=====================================input======================================
+// @flow
+
+enum E of bigint {
+  A = 0n,
+  B = 1n,
+}
+
+=====================================output=====================================
+// @flow
+
+enum E of bigint {
+  A = 0n,
+  B = 1n,
+}
+
+================================================================================
+`;
+
+exports[`enum-bigint-implicit.js - {"trailingComma":"all"} [babel-flow] format 1`] = `
+"The enum member initializer for \`A\` needs to be a literal (either a boolean, number, or string) in enum \`E\`. (4:7)
+  2 |
+  3 | enum E {
+> 4 |   A = 0n,
+    |       ^
+  5 |   B = 1n,
+  6 | }
+  7 |
+Cause: The enum member initializer for \`A\` needs to be a literal (either a boolean, number, or string) in enum \`E\`. (4:6)"
+`;
+
+exports[`enum-bigint-implicit.js - {"trailingComma":"all"} format 1`] = `
+====================================options=====================================
+parsers: ["flow"]
+printWidth: 80
+trailingComma: "all"
+                                                                                | printWidth
+=====================================input======================================
+// @flow
+
+enum E {
+  A = 0n,
+  B = 1n,
+}
+
+=====================================output=====================================
+// @flow
+
+enum E {
+  A = 0n,
+  B = 1n,
+}
+
+================================================================================
+`;
+
 exports[`enum-boolean-explicit.js - {"trailingComma":"all"} format 1`] = `
 ====================================options=====================================
 parsers: ["flow"]
diff --git a/tests/format/flow/enums/enum-bigint-explicit.js b/tests/format/flow/enums/enum-bigint-explicit.js
new file mode 100644
index 000000000..ee04cc411
--- /dev/null
+++ b/tests/format/flow/enums/enum-bigint-explicit.js
@@ -0,0 +1,6 @@
+// @flow
+
+enum E of bigint {
+  A = 0n,
+  B = 1n,
+}
diff --git a/tests/format/flow/enums/enum-bigint-implicit.js b/tests/format/flow/enums/enum-bigint-implicit.js
new file mode 100644
index 000000000..00e0df6c2
--- /dev/null
+++ b/tests/format/flow/enums/enum-bigint-implicit.js
@@ -0,0 +1,6 @@
+// @flow
+
+enum E {
+  A = 0n,
+  B = 1n,
+}
diff --git a/tests/format/flow/enums/format.test.js b/tests/format/flow/enums/format.test.js
index c4968a3fd..021a1b322 100644
--- a/tests/format/flow/enums/format.test.js
+++ b/tests/format/flow/enums/format.test.js
@@ -1 +1,6 @@
-runFormatTest(import.meta, ["flow"], { trailingComma: "all" });
+runFormatTest(import.meta, ["flow"], {
+  trailingComma: "all",
+  errors: {
+    "babel-flow": ["enum-bigint-explicit.js", "enum-bigint-implicit.js"],
+  },
+});
diff --git a/tests/unit/__snapshots__/visitor-keys.js.snap b/tests/unit/__snapshots__/visitor-keys.js.snap
index 12eda1c5f..5727c1a17 100644
--- a/tests/unit/__snapshots__/visitor-keys.js.snap
+++ b/tests/unit/__snapshots__/visitor-keys.js.snap
@@ -267,6 +267,13 @@ exports[`visitor keys estree 1`] = `
   ],
   "EmptyStatement": [],
   "EmptyTypeAnnotation": [],
+  "EnumBigIntBody": [
+    "members",
+  ],
+  "EnumBigIntMember": [
+    "id",
+    "init",
+  ],
   "EnumBooleanBody": [
     "members",
   ],
diff --git a/yarn.lock b/yarn.lock
index f0d2fd862..81d19914d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4430,10 +4430,10 @@ __metadata:
   languageName: node
   linkType: hard
 
-"flow-parser@npm:0.233.0":
-  version: 0.233.0
-  resolution: "flow-parser@npm:0.233.0"
-  checksum: 10/a0c4b33f07da28fc5c41ae9b5ad014b298744001c66cb7042a6caa3aacaf50b1bd765a6446c05b396987fc9f2144f8e4490fae12f596d9f61ea0731aa7985f0c
+"flow-parser@npm:0.235.1":
+  version: 0.235.1
+  resolution: "flow-parser@npm:0.235.1"
+  checksum: 10/2c158e940deb2f3312dc91fe0890118295c6dc4823930cf18039bc6facd434504008a7b914a5a5be2f4d30274e0b31f8621d05417e5e4579e4df1f3fdd7cc949
   languageName: node
   linkType: hard
 
@@ -4818,19 +4818,19 @@ __metadata:
   languageName: node
   linkType: hard
 
-"hermes-estree@npm:0.20.1":
-  version: 0.20.1
-  resolution: "hermes-estree@npm:0.20.1"
-  checksum: 10/b98fc2943bd9fdd904c094e995f79cb7d5958393e221006af81d88f3aed52ddbf15138a6606766d5e6be7ba166576be65f577d0c72ae5eb0f3f56d4720b32baa
+"hermes-estree@npm:0.21.0":
+  version: 0.21.0
+  resolution: "hermes-estree@npm:0.21.0"
+  checksum: 10/2c978c9ed33555a7a70655f03b7cba3d2e477d8b64a97e00ffab86a076080d554ef5abba037d39e9d5604849cb3b6f13bd0242a6e75fd3cfe051cac180fa92fb
   languageName: node
   linkType: hard
 
-"hermes-parser@npm:0.20.1":
-  version: 0.20.1
-  resolution: "hermes-parser@npm:0.20.1"
+"hermes-parser@npm:0.21.0":
+  version: 0.21.0
+  resolution: "hermes-parser@npm:0.21.0"
   dependencies:
-    hermes-estree: "npm:0.20.1"
-  checksum: 10/b1ae9e9f6b49234fcf2bd45eafde140a3c727b8bcb845ab398016a538f040d326291d1f8b75fd91793b8817f2c600a890e251984d55bdedea74a5143d29f0c81
+    hermes-estree: "npm:0.21.0"
+  checksum: 10/326054b7c8bbbb265df5ded508043f14cfa7cff405dd4ca0fc3564424c30248bc361a8e638b159c4e77821f1ba468e8fa34e197a34579bca86ef8cc7db85bb8e
   languageName: node
   linkType: hard
 
@@ -7454,11 +7454,11 @@ __metadata:
     fast-json-stable-stringify: "npm:2.1.0"
     file-entry-cache: "npm:7.0.2"
     find-cache-dir: "npm:5.0.0"
-    flow-parser: "npm:0.233.0"
+    flow-parser: "npm:0.235.1"
     get-east-asian-width: "npm:1.2.0"
     get-stdin: "npm:9.0.0"
     graphql: "npm:16.8.1"
-    hermes-parser: "npm:0.20.1"
+    hermes-parser: "npm:0.21.0"
     html-element-attributes: "npm:3.4.0"
     html-tag-names: "npm:2.1.0"
     html-ua-styles: "npm:0.0.6"