diff --git a/changelog_unreleased/javascript/15485.md b/changelog_unreleased/javascript/15485.md
new file mode 100644
index 000000000..3dbc8726a
--- /dev/null
+++ b/changelog_unreleased/javascript/15485.md
@@ -0,0 +1,27 @@
+#### Support new syntaxes supported by Babel 7.23.0 (#15485, #15486, #15487, #15488 by @sosukesuzuki)
+
+We support new JS syntax supported by [Babel 7.23.0](https://babeljs.io/blog/2023/09/25/7.23.0)!
+
+##### Source Phase Imports
+
+Please see https://github.com/tc39/proposal-source-phase-imports for more details.
+
+```js
+import source x from "mod";
+```
+
+##### Deferred Import Evaluation
+
+Please see https://github.com/tc39/proposal-defer-import-eval for more details.
+
+```js
+import defer * as ns from "mod";
+```
+
+##### Optional Chaining Assignments
+
+Please see https://github.com/tc39/proposal-optional-chaining-assignment for more details.
+
+```js
+maybeObj?.prop1 = value;
+```
diff --git a/package.json b/package.json
index df6500596..bdb96950a 100644
--- a/package.json
+++ b/package.json
@@ -32,8 +32,8 @@
   "dependencies": {
     "@angular/compiler": "16.2.6",
     "@babel/code-frame": "7.22.13",
-    "@babel/parser": "7.22.16",
-    "@babel/types": "7.22.19",
+    "@babel/parser": "7.23.0",
+    "@babel/types": "7.23.0",
     "@glimmer/syntax": "0.84.3",
     "@iarna/toml": "2.2.5",
     "@prettier/is-es5-identifier-name": "0.2.0",
diff --git a/tests/format/misc/errors/invalid/__snapshots__/jsfmt.spec.js.snap b/tests/format/misc/errors/invalid/__snapshots__/jsfmt.spec.js.snap
index 471473220..740efea68 100644
--- a/tests/format/misc/errors/invalid/__snapshots__/jsfmt.spec.js.snap
+++ b/tests/format/misc/errors/invalid/__snapshots__/jsfmt.spec.js.snap
@@ -325,7 +325,7 @@ exports[`snippet: #4 [babel] format 1`] = `
 `;
 
 exports[`snippet: #4 [babel] format 2`] = `
-"Invalid left-hand side in parenthesized expression. (1:2)
+"Invalid left-hand side in assignment expression. (1:2)
 > 1 | (a = b) += 1
     |  ^"
 `;
@@ -337,7 +337,7 @@ exports[`snippet: #4 [babel-flow] format 1`] = `
 `;
 
 exports[`snippet: #4 [babel-flow] format 2`] = `
-"Invalid left-hand side in parenthesized expression. (1:2)
+"Invalid left-hand side in assignment expression. (1:2)
 > 1 | (a = b) += 1
     |  ^"
 `;
@@ -349,7 +349,7 @@ exports[`snippet: #4 [babel-ts] format 1`] = `
 `;
 
 exports[`snippet: #4 [babel-ts] format 2`] = `
-"Invalid left-hand side in parenthesized expression. (1:2)
+"Invalid left-hand side in assignment expression. (1:2)
 > 1 | (a = b) += 1
     |  ^"
 `;
diff --git a/tests/format/misc/errors/js/assignment/__snapshots__/jsfmt.spec.js.snap b/tests/format/misc/errors/js/assignment/__snapshots__/jsfmt.spec.js.snap
index f4b45b707..1c7025ad8 100644
--- a/tests/format/misc/errors/js/assignment/__snapshots__/jsfmt.spec.js.snap
+++ b/tests/format/misc/errors/js/assignment/__snapshots__/jsfmt.spec.js.snap
@@ -25,7 +25,7 @@ exports[`snippet: #0 [babel] format 1`] = `
 `;
 
 exports[`snippet: #0 [babel] format 2`] = `
-"Invalid left-hand side in assignment expression. (1:1)
+"This experimental syntax requires enabling the parser plugin: "optionalChainingAssign". (1:1)
 > 1 | let?.()[a] =1
     | ^"
 `;
@@ -37,7 +37,7 @@ exports[`snippet: #0 [babel-ts] format 1`] = `
 `;
 
 exports[`snippet: #0 [babel-ts] format 2`] = `
-"Invalid left-hand side in assignment expression. (1:1)
+"This experimental syntax requires enabling the parser plugin: "optionalChainingAssign". (1:1)
 > 1 | let?.()[a] =1
     | ^"
 `;
@@ -91,13 +91,13 @@ exports[`snippet: #1 [acorn] format 1`] = `
 `;
 
 exports[`snippet: #1 [babel] format 1`] = `
-"Invalid left-hand side in assignment expression. (1:1)
+"This experimental syntax requires enabling the parser plugin: "optionalChainingAssign". (1:1)
 > 1 | let?.[a] = 1
     | ^"
 `;
 
 exports[`snippet: #1 [babel-ts] format 1`] = `
-"Invalid left-hand side in assignment expression. (1:1)
+"This experimental syntax requires enabling the parser plugin: "optionalChainingAssign". (1:1)
 > 1 | let?.[a] = 1
     | ^"
 `;
diff --git a/tests/unit/__snapshots__/visitor-keys.js.snap b/tests/unit/__snapshots__/visitor-keys.js.snap
index ca034cdaf..aa6243a80 100644
--- a/tests/unit/__snapshots__/visitor-keys.js.snap
+++ b/tests/unit/__snapshots__/visitor-keys.js.snap
@@ -373,6 +373,7 @@ exports[`visitor keys estree 1`] = `
   ],
   "ImportExpression": [
     "source",
+    "options",
     "attributes",
   ],
   "ImportNamespaceSpecifier": [
diff --git a/yarn.lock b/yarn.lock
index deb2de14f..dc05d6b6c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -202,7 +202,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@babel/helper-validator-identifier@npm:^7.22.19, @babel/helper-validator-identifier@npm:^7.22.5":
+"@babel/helper-validator-identifier@npm:^7.22.20, @babel/helper-validator-identifier@npm:^7.22.5":
   version: 7.22.20
   resolution: "@babel/helper-validator-identifier@npm:7.22.20"
   checksum: 136412784d9428266bcdd4d91c32bcf9ff0e8d25534a9d94b044f77fe76bc50f941a90319b05aafd1ec04f7d127cd57a179a3716009ff7f3412ef835ada95bdc
@@ -238,12 +238,12 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@babel/parser@npm:7.22.16, @babel/parser@npm:^7.1.0, @babel/parser@npm:^7.14.7, @babel/parser@npm:^7.20.7, @babel/parser@npm:^7.22.5":
-  version: 7.22.16
-  resolution: "@babel/parser@npm:7.22.16"
+"@babel/parser@npm:7.23.0, @babel/parser@npm:^7.1.0, @babel/parser@npm:^7.14.7, @babel/parser@npm:^7.20.7, @babel/parser@npm:^7.22.5":
+  version: 7.23.0
+  resolution: "@babel/parser@npm:7.23.0"
   bin:
     parser: ./bin/babel-parser.js
-  checksum: 944c756b5bdeb07b9fec16ecef6b3c61aff9d4c4b924abadcf01afa1840a740b8e2357ae00482b5b37daad6d2bfd848c947f27ad65138d687b6fdc924bc59edd
+  checksum: 453fdf8b9e2c2b7d7b02139e0ce003d1af21947bbc03eb350fb248ee335c9b85e4ab41697ddbdd97079698de825a265e45a0846bb2ed47a2c7c1df833f42a354
   languageName: node
   linkType: hard
 
@@ -430,14 +430,14 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@babel/types@npm:7.22.19, @babel/types@npm:^7.0.0, @babel/types@npm:^7.20.7, @babel/types@npm:^7.22.15, @babel/types@npm:^7.22.5, @babel/types@npm:^7.3.3, @babel/types@npm:^7.8.3":
-  version: 7.22.19
-  resolution: "@babel/types@npm:7.22.19"
+"@babel/types@npm:7.23.0, @babel/types@npm:^7.0.0, @babel/types@npm:^7.20.7, @babel/types@npm:^7.22.15, @babel/types@npm:^7.22.5, @babel/types@npm:^7.3.3, @babel/types@npm:^7.8.3":
+  version: 7.23.0
+  resolution: "@babel/types@npm:7.23.0"
   dependencies:
     "@babel/helper-string-parser": ^7.22.5
-    "@babel/helper-validator-identifier": ^7.22.19
+    "@babel/helper-validator-identifier": ^7.22.20
     to-fast-properties: ^2.0.0
-  checksum: 2d69740e69b55ba36ece0c17d5afb7b7213b34297157df39ef9ba24965aff677c56f014413052ecc5b2fbbf26910c63e5bb24a969df84d7a17153750cf75915e
+  checksum: 215fe04bd7feef79eeb4d33374b39909ce9cad1611c4135a4f7fdf41fe3280594105af6d7094354751514625ea92d0875aba355f53e86a92600f290e77b0e604
   languageName: node
   linkType: hard
 
@@ -7162,8 +7162,8 @@ __metadata:
     "@angular/compiler": 16.2.6
     "@babel/code-frame": 7.22.13
     "@babel/generator": 7.22.15
-    "@babel/parser": 7.22.16
-    "@babel/types": 7.22.19
+    "@babel/parser": 7.23.0
+    "@babel/types": 7.23.0
     "@glimmer/reference": 0.84.3
     "@glimmer/syntax": 0.84.3
     "@iarna/toml": 2.2.5