diff --git a/package.json b/package.json
index 72386546bb..fd46586a1a 100644
--- a/package.json
+++ b/package.json
@@ -61,7 +61,7 @@
     "lint-staged": "^9.2.0",
     "lodash": "^4.17.21",
     "mergeiterator": "^1.2.5",
-    "prettier": "2.3.0",
+    "prettier": "2.3.1",
     "rollup": "^2.47.0",
     "rollup-plugin-dts": "^2.0.0",
     "rollup-plugin-node-polyfills": "^0.2.1",
diff --git a/packages/babel-core/src/config/config-chain.ts b/packages/babel-core/src/config/config-chain.ts
index 9af4cf4514..0ebf606312 100644
--- a/packages/babel-core/src/config/config-chain.ts
+++ b/packages/babel-core/src/config/config-chain.ts
@@ -717,8 +717,10 @@ function normalizeOptions(opts: ValidatedOptions): ValidatedOptions {
 function dedupDescriptors(
   items: Array<UnloadedDescriptor>,
 ): Array<UnloadedDescriptor> {
-  const map: Map<Function, Map<string | void, { value: UnloadedDescriptor }>> =
-    new Map();
+  const map: Map<
+    Function,
+    Map<string | void, { value: UnloadedDescriptor }>
+  > = new Map();
 
   const descriptors = [];
 
diff --git a/packages/babel-core/src/config/full.ts b/packages/babel-core/src/config/full.ts
index 0e8a333918..286b16e791 100644
--- a/packages/babel-core/src/config/full.ts
+++ b/packages/babel-core/src/config/full.ts
@@ -283,10 +283,14 @@ const makeDescriptorLoader = <Context, API>(
     return { value: item, options, dirname, alias };
   });
 
-const pluginDescriptorLoader =
-  makeDescriptorLoader<Context.SimplePlugin, PluginAPI>(makePluginAPI);
-const presetDescriptorLoader =
-  makeDescriptorLoader<Context.SimplePreset, PresetAPI>(makePresetAPI);
+const pluginDescriptorLoader = makeDescriptorLoader<
+  Context.SimplePlugin,
+  PluginAPI
+>(makePluginAPI);
+const presetDescriptorLoader = makeDescriptorLoader<
+  Context.SimplePreset,
+  PresetAPI
+>(makePresetAPI);
 
 /**
  * Instantiate a plugin for the given descriptor, returning the plugin/options pair.
diff --git a/packages/babel-plugin-transform-typescript/src/namespace.ts b/packages/babel-plugin-transform-typescript/src/namespace.ts
index 84ea984864..4392467c10 100644
--- a/packages/babel-plugin-transform-typescript/src/namespace.ts
+++ b/packages/babel-plugin-transform-typescript/src/namespace.ts
@@ -68,9 +68,13 @@ function handleVariableDeclaration(
   }
   const { declarations } = node;
   if (
-    declarations.every((declarator): declarator is t.VariableDeclarator & {
-      id: t.Identifier;
-    } => t.isIdentifier(declarator.id))
+    declarations.every(
+      (
+        declarator,
+      ): declarator is t.VariableDeclarator & {
+        id: t.Identifier;
+      } => t.isIdentifier(declarator.id),
+    )
   ) {
     // `export const a = 1` transforms to `const a = N.a = 1`, the output
     // is smaller than `const a = 1; N.a = a`;
diff --git a/yarn.lock b/yarn.lock
index f127721b26..d1a25c37a7 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5773,7 +5773,7 @@ __metadata:
     lint-staged: ^9.2.0
     lodash: ^4.17.21
     mergeiterator: ^1.2.5
-    prettier: 2.3.0
+    prettier: 2.3.1
     rollup: ^2.47.0
     rollup-plugin-dts: ^2.0.0
     rollup-plugin-node-polyfills: ^0.2.1
@@ -12605,12 +12605,12 @@ fsevents@^1.2.7:
   languageName: node
   linkType: hard
 
-"prettier@npm:2.3.0":
-  version: 2.3.0
-  resolution: "prettier@npm:2.3.0"
+"prettier@npm:2.3.1":
+  version: 2.3.1
+  resolution: "prettier@npm:2.3.1"
   bin:
     prettier: bin-prettier.js
-  checksum: 652640cc8b71bc5277cfb8bf6f161783ca588efcf683c3d630837b39da8d57fef35c9e00ae5855a8e3c75136c42274046c913cc2b2d2968558315f31c6a26981
+  checksum: 9b4a695b87ce5f510fc20feec01cce7371f0fa0b92ffe79d543f6be52e2004c532861629de4d7ab1c577e1f649dce3cfccd62cb2ca6526b1da8d9c63eb84bf36
   languageName: node
   linkType: hard