diff --git a/package.json b/package.json
index c2343c1..7ac3512 100644
--- a/package.json
+++ b/package.json
@@ -70,7 +70,7 @@
     "mocha": "^4.0.1",
     "nyc": "^11.4.1",
     "proxyquire": "^1.7.11",
-    "sinon": "^4.1.3"
+    "sinon": "^4.1.5"
   },
   "jest": {
     "testEnvironment": "node",
diff --git a/yarn.lock b/yarn.lock
index 535a64c..50d46a7 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3972,9 +3972,9 @@ signal-exit@^3.0.0, signal-exit@^3.0.1, signal-exit@^3.0.2:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/signal-exit/-/signal-exit-3.0.2.tgz#b5fdc08f1287ea1178628e415e25132b73646c6d"
 
-sinon@^4.1.3:
-  version "4.1.3"
-  resolved "https://registry.yarnpkg.com/sinon/-/sinon-4.1.3.tgz#fc599eda47ed9f1a694ce774b94ab44260bd7ac5"
+sinon@^4.1.5:
+  version "4.1.5"
+  resolved "https://registry.yarnpkg.com/sinon/-/sinon-4.1.5.tgz#620a9b2ac599f88b0455763070f16f4057ed6395"
   dependencies:
     diff "^3.1.0"
     formatio "1.2.0"