diff --git a/.changeset/wicked-pandas-turn.md b/.changeset/wicked-pandas-turn.md
new file mode 100644
index 0000000..deed0dc
--- /dev/null
+++ b/.changeset/wicked-pandas-turn.md
@@ -0,0 +1,5 @@
+---
+'eslint-config-widen': minor
+---
+
+Make `@babel/eslint-parser` and optional peer dependency.
diff --git a/packages/eslint-config-widen/package.json b/packages/eslint-config-widen/package.json
index 32f288f..1f7165f 100644
--- a/packages/eslint-config-widen/package.json
+++ b/packages/eslint-config-widen/package.json
@@ -35,6 +35,9 @@
     "eslint-plugin-widen": ">=0.1.0"
   },
   "peerDependenciesMeta": {
+    "@babel/eslint-parser": {
+      "optional": true
+    },
     "@typescript-eslint/eslint-plugin": {
       "optional": true
     },
diff --git a/yarn.lock b/yarn.lock
index 07d17d9..2ab0331 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3928,6 +3928,8 @@ __metadata:
     eslint-plugin-sort: ">= 2"
     eslint-plugin-widen: ">=0.1.0"
   peerDependenciesMeta:
+    "@babel/eslint-parser":
+      optional: true
     "@typescript-eslint/eslint-plugin":
       optional: true
     "@typescript-eslint/parser":