diff --git a/package.json b/package.json
index 17dc9c8..fce2f63 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
   "description": "A Prettier config for the Haneru Developers.",
   "devDependencies": {
     "ajv-cli": "^3.3.0",
-    "prettier": "^2.3.0",
+    "prettier": "~2.3.0",
     "standard-version": "^9.3.0"
   },
   "homepage": "https://github.com/inabagumi/prettier-config",
diff --git a/yarn.lock b/yarn.lock
index 8807171..b994922 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1264,7 +1264,7 @@ pinkie@^2.0.0:
   resolved "https://registry.yarnpkg.com/pinkie/-/pinkie-2.0.4.tgz#72556b80cfa0d48a974e80e77248e80ed4f7f870"
   integrity sha1-clVrgM+g1IqXToDnckjoDtT3+HA=
 
-prettier@^2.3.0:
+prettier@~2.3.0:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.3.0.tgz#b6a5bf1284026ae640f17f7ff5658a7567fc0d18"
   integrity sha512-kXtO4s0Lz/DW/IJ9QdWhAf7/NmPWQXkFr/r/WkR3vyI+0v8amTDxiaQSLzs8NBlytfLWX/7uQUMIW677yLKl4w==