diff --git a/package-lock.json b/package-lock.json
index 0561f989..ed8a1c85 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9621,9 +9621,9 @@
       "dev": true
     },
     "sinon": {
-      "version": "4.4.8",
-      "resolved": "https://registry.npmjs.org/sinon/-/sinon-4.4.8.tgz",
-      "integrity": "sha512-EWZf/D5BN/BbDFPmwY2abw6wgELVmk361self+lcwEmVw0WWUxURp2S/YoDB2WG/xurFVzKQglMARweYRWM6Hw==",
+      "version": "4.4.9",
+      "resolved": "https://registry.npmjs.org/sinon/-/sinon-4.4.9.tgz",
+      "integrity": "sha512-0T0jXEG897qaZF4I9YHmqQIM7g48I62EQiM/2J1J6C5pIYBFpk8YAECSE/gmXIxLU5xVT3qqsQto2VSByrHXlg==",
       "dev": true,
       "requires": {
         "@sinonjs/formatio": "2.0.0",
diff --git a/package.json b/package.json
index 80610cbd..4dd3a4d1 100644
--- a/package.json
+++ b/package.json
@@ -52,7 +52,7 @@
     "mocha": "^5.0.5",
     "rollup": "^0.57.1",
     "rollup-plugin-babel": "^3.0.3",
-    "sinon": "^4.4.8",
+    "sinon": "^4.4.9",
     "sinon-chai": "^3.0.0",
     "ts-loader": "^4.1.0",
     "tsconfig-holy-grail": "^4.0.2",