diff --git a/package-lock.json b/package-lock.json
index 25a9bbd1..485fc759 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -7815,9 +7815,9 @@
       "dev": true
     },
     "sinon": {
-      "version": "4.2.0",
-      "resolved": "https://registry.npmjs.org/sinon/-/sinon-4.2.0.tgz",
-      "integrity": "sha512-FAdCcQ6lUAakWQMVRSIhiQU90d5EH1k3V6wRPrjxcYsv4vlBHjFzWLeoD63GoTKrFkfzVQs209aFW8V3cGLNtA==",
+      "version": "4.2.1",
+      "resolved": "https://registry.npmjs.org/sinon/-/sinon-4.2.1.tgz",
+      "integrity": "sha512-lx9ZCoScNhvs6+n3ku78CqIpQNIiY9gLfvuIdhZjnKOkcVL6FfWfA1jkOrcO+n3mX4BIg2XwQnyCS/Ive21QMw==",
       "dev": true,
       "requires": {
         "diff": "3.2.0",
diff --git a/package.json b/package.json
index af80c4a4..7af619c0 100644
--- a/package.json
+++ b/package.json
@@ -42,7 +42,7 @@
     "mocha": "^5.0.0",
     "rollup": "^0.55.0",
     "rollup-plugin-babel": "^3.0.3",
-    "sinon": "^4.2.0",
+    "sinon": "^4.2.1",
     "sinon-chai": "^2.14.0",
     "ts-loader": "^3.3.1",
     "tsconfig-holy-grail": "^3.0.17",