diff --git a/packages/shipjs-lib/package.json b/packages/shipjs-lib/package.json
index e31523df..28a04a85 100644
--- a/packages/shipjs-lib/package.json
+++ b/packages/shipjs-lib/package.json
@@ -39,7 +39,7 @@
     "jest": "26.0.1",
     "jest-watch-typeahead": "0.6.0",
     "json": "9.0.6",
-    "prettier": "2.0.5",
+    "prettier": "2.3.1",
     "rollup": "2.14.0",
     "rollup-plugin-commonjs": "10.1.0",
     "rollup-plugin-node-resolve": "5.2.0"
diff --git a/yarn.lock b/yarn.lock
index c4d8b273..c6797539 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -11525,10 +11525,10 @@ prettier-linter-helpers@^1.0.0:
   dependencies:
     fast-diff "^1.1.2"
 
-prettier@2.0.5:
-  version "2.0.5"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.0.5.tgz#d6d56282455243f2f92cc1716692c08aa31522d4"
-  integrity sha512-7PtVymN48hGcO4fGjybyBSIWDsLU4H4XlvOHfq91pz9kkGlonzwTfYkaIEwiRg/dAJF9YlbsduBAgtYLi+8cFg==
+prettier@2.3.1:
+  version "2.3.1"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.3.1.tgz#76903c3f8c4449bc9ac597acefa24dc5ad4cbea6"
+  integrity sha512-p+vNbgpLjif/+D+DwAZAbndtRrR0md0MwfmOVN9N+2RgyACMT+7tfaRnT+WDPkqnuVwleyuBIG2XBxKDme3hPA==
 
 prettier@^1.18.2:
   version "1.19.1"