diff --git a/package.json b/package.json
index 621e8c9..2445bbe 100644
--- a/package.json
+++ b/package.json
@@ -49,7 +49,7 @@
     "koa-router": "9.4.0",
     "mocha": "8.1.1",
     "prettier": "2.0.5",
-    "sinon": "9.0.3",
+    "sinon": "9.1.0",
     "sinon-chai": "3.5.0",
     "supertest": "4.0.2"
   },
diff --git a/yarn.lock b/yarn.lock
index a8f3534..1529bf6 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2197,10 +2197,10 @@ sinon-chai@3.5.0:
   resolved "https://registry.yarnpkg.com/sinon-chai/-/sinon-chai-3.5.0.tgz#c9a78304b0e15befe57ef68e8a85a00553f5c60e"
   integrity sha512-IifbusYiQBpUxxFJkR3wTU68xzBN0+bxCScEaKMjBvAQERg6FnTTc1F17rseLb1tjmkJ23730AXpFI0c47FgAg==
 
-sinon@9.0.3:
-  version "9.0.3"
-  resolved "https://registry.yarnpkg.com/sinon/-/sinon-9.0.3.tgz#bffc3ec28c936332cd2a41833547b9eed201ecff"
-  integrity sha512-IKo9MIM111+smz9JGwLmw5U1075n1YXeAq8YeSFlndCLhAL5KGn6bLgu7b/4AYHTV/LcEMcRm2wU2YiL55/6Pg==
+sinon@9.1.0:
+  version "9.1.0"
+  resolved "https://registry.yarnpkg.com/sinon/-/sinon-9.1.0.tgz#4afc90707c8e360fe051398eed2d3b197980ffc3"
+  integrity sha512-9zQShgaeylYH6qtsnNXlTvv0FGTTckuDfHBi+qhgj5PvW2r2WslHZpgc3uy3e/ZAoPkqaOASPi+juU6EdYRYxA==
   dependencies:
     "@sinonjs/commons" "^1.7.2"
     "@sinonjs/fake-timers" "^6.0.1"