diff --git a/package.json b/package.json
index b7ac65a..56cd896 100644
--- a/package.json
+++ b/package.json
@@ -8,6 +8,6 @@
     "@types/koa": "^2.0.48",
     "koa": "^2.7.0",
     "typescript": "^3.4.5",
-    "yarn": "^1.16.0"
+    "yarn": "^1.17.3"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index 8f9b524..23fc1b2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -367,10 +367,10 @@ vary@^1.1.2:
   resolved "https://registry.yarnpkg.com/vary/-/vary-1.1.2.tgz#2299f02c6ded30d4a5961b0b9f74524a18f634fc"
   integrity sha1-IpnwLG3tMNSllhsLn3RSShj2NPw=
 
-yarn@^1.16.0:
-  version "1.16.0"
-  resolved "https://registry.yarnpkg.com/yarn/-/yarn-1.16.0.tgz#5701b58ac555ff91f7b889b7d791b3dc86f8f999"
-  integrity sha512-cfemyGlnWKA1zopUUgebTPf8C4WkPIZ+TJmklwcEAJ4u6oWPtJeAzrsamaGGh/+b1XWe8W51yzAImC4AWbWR1g==
+yarn@^1.17.3:
+  version "1.17.3"
+  resolved "https://registry.yarnpkg.com/yarn/-/yarn-1.17.3.tgz#60e0b77d079eb78e753bb616f7592b51b6a9adce"
+  integrity sha512-CgA8o7nRZaQvmeF/WBx2FC7f9W/0X59T2IaLYqgMo6637wfp5mMEsM3YXoJtKUspnpmDJKl/gGFhnqS+sON7hA==
 
 ylru@^1.2.0:
   version "1.2.1"