diff --git a/package.json b/package.json
index 4532f209..06502c57 100644
--- a/package.json
+++ b/package.json
@@ -105,7 +105,7 @@
     "prettier": "1.19.1",
     "pretty-quick": "2.0.1",
     "primer-tooltips": "2.0.0",
-    "sinon": "8.0.2",
+    "sinon": "8.0.4",
     "socket.io-client": "2.3.0",
     "stylelint": "12.0.1",
     "stylelint-config-standard": "19.0.0",
diff --git a/yarn.lock b/yarn.lock
index fc98d67a..1ee7392a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -8073,10 +8073,10 @@ simple-swizzle@^0.2.2:
   dependencies:
     is-arrayish "^0.3.1"
 
-sinon@8.0.2:
-  version "8.0.2"
-  resolved "https://registry.yarnpkg.com/sinon/-/sinon-8.0.2.tgz#cc5f6daa9cc351b86b03faaca1e9c3650a04ae11"
-  integrity sha512-8W1S7BnCyvk7SK+Xi15B1QAVLuS81G/NGmWefPb31+ly6xI3fXaug/g5oUdfc8+7ruC4Ay51AxuLlYm8diq6kA==
+sinon@8.0.4:
+  version "8.0.4"
+  resolved "https://registry.yarnpkg.com/sinon/-/sinon-8.0.4.tgz#eb13242fa50bf876c54e88bdc96f281a0dd08a53"
+  integrity sha512-cFsmgmvsgFb87e7SV7IcekogITlHX2KmlplyI9Pda0FH1Z8Ms/kWbpLs25Idp0m6ZJ3HEEjhaYYXbcTtWWUn4w==
   dependencies:
     "@sinonjs/commons" "^1.7.0"
     "@sinonjs/formatio" "^4.0.1"