diff --git a/package.json b/package.json
index d017c11e..6a7661ff 100644
--- a/package.json
+++ b/package.json
@@ -45,7 +45,7 @@
     "jest": "23.6.0",
     "lerna": "3.22.1",
     "lint-staged": "^8.1.5",
-    "prettier": "1.19.1",
+    "prettier": "2.0.5",
     "renovate-config-nju33": "0.0.1",
     "tslint": "5.20.1",
     "typescript": "3.4.5"
diff --git a/packages/gsw/package.json b/packages/gsw/package.json
index 46ba568c..81849c08 100644
--- a/packages/gsw/package.json
+++ b/packages/gsw/package.json
@@ -36,7 +36,7 @@
     "coveralls": "^3.0.3",
     "jest": "23.6.0",
     "lerna": "3.22.1",
-    "prettier": "1.19.1",
+    "prettier": "2.0.5",
     "renovate-config-nju33": "0.0.1",
     "rollup": "1.32.1",
     "ts-jest": "23.10.5",
diff --git a/yarn.lock b/yarn.lock
index b21dd310..c3ef6833 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -8945,10 +8945,10 @@ prettier-linter-helpers@^1.0.0:
   dependencies:
     fast-diff "^1.1.2"
 
-prettier@1.19.1:
-  version "1.19.1"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.19.1.tgz#f7d7f5ff8a9cd872a7be4ca142095956a60797cb"
-  integrity sha512-s7PoyDv/II1ObgQunCbB9PdLmUcBZcnWOcxDh7O0N/UwDEsHyqkW+Qh28jW+mVuCdx7gLB0BotYI1Y6uI9iyew==
+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==
 
 pretty-format@^23.6.0:
   version "23.6.0"