diff --git a/package.json b/package.json
index c2343c1..3d87d4c 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": "^6.3.1"
   },
   "jest": {
     "testEnvironment": "node",
diff --git a/yarn.lock b/yarn.lock
index 535a64c..28e9b93 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -67,6 +67,24 @@
   version "0.6.0"
   resolved "https://registry.yarnpkg.com/@sindresorhus/is/-/is-0.6.0.tgz#383f456b26bc96c7889f0332079f4358b16c58dc"
 
+"@sinonjs/commons@^1.0.2":
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/@sinonjs/commons/-/commons-1.0.2.tgz#3e0ac737781627b8844257fadc3d803997d0526e"
+  dependencies:
+    type-detect "4.0.8"
+
+"@sinonjs/formatio@^2.0.0":
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/@sinonjs/formatio/-/formatio-2.0.0.tgz#84db7e9eb5531df18a8c5e0bfb6e449e55e654b2"
+  dependencies:
+    samsam "1.3.0"
+
+"@sinonjs/samsam@^2.0.0":
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/@sinonjs/samsam/-/samsam-2.1.0.tgz#b8b8f5b819605bd63601a6ede459156880f38ea3"
+  dependencies:
+    array-from "^2.1.1"
+
 "@types/node@*":
   version "8.5.1"
   resolved "https://registry.yarnpkg.com/@types/node/-/node-8.5.1.tgz#4ec3020bcdfe2abffeef9ba3fbf26fca097514b5"
@@ -213,6 +231,10 @@ array-equal@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/array-equal/-/array-equal-1.0.0.tgz#8c2a5ef2472fd9ea742b04c77a75093ba2757c93"
 
+array-from@^2.1.1:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/array-from/-/array-from-2.1.1.tgz#cfe9d8c26628b9dc5aecc62a9f5d8f1f352c1195"
+
 array-union@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/array-union/-/array-union-1.0.2.tgz#9a34410e4f4e3da23dea375be5be70f24778ec39"
@@ -1294,10 +1316,14 @@ diff@3.3.1:
   version "3.3.1"
   resolved "https://registry.yarnpkg.com/diff/-/diff-3.3.1.tgz#aa8567a6eed03c531fc89d3f711cd0e5259dec75"
 
-diff@^3.1.0, diff@^3.2.0:
+diff@^3.2.0:
   version "3.4.0"
   resolved "https://registry.yarnpkg.com/diff/-/diff-3.4.0.tgz#b1d85507daf3964828de54b37d0d73ba67dda56c"
 
+diff@^3.5.0:
+  version "3.5.0"
+  resolved "https://registry.yarnpkg.com/diff/-/diff-3.5.0.tgz#800c0dd1e0a8bfbc95835c202ad220fe317e5a12"
+
 doctrine@1.5.0:
   version "1.5.0"
   resolved "https://registry.yarnpkg.com/doctrine/-/doctrine-1.5.0.tgz#379dce730f6166f76cefa4e6707a159b02c5a6fa"
@@ -1751,12 +1777,6 @@ form-data@~2.3.1:
     combined-stream "^1.0.5"
     mime-types "^2.1.12"
 
-formatio@1.2.0, formatio@^1.2.0:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/formatio/-/formatio-1.2.0.tgz#f3b2167d9068c4698a8d51f4f760a39a54d818eb"
-  dependencies:
-    samsam "1.x"
-
 from2@^2.1.1:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/from2/-/from2-2.3.0.tgz#8bfb5502bde4a4d36cfdeea007fcca21d7e382af"
@@ -1978,6 +1998,10 @@ has-flag@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/has-flag/-/has-flag-2.0.0.tgz#e8207af1cc7b30d446cc70b734b5e8be18f88d51"
 
+has-flag@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/has-flag/-/has-flag-3.0.0.tgz#b5d454dc2199ae225699f3467e5a07f3b955bafd"
+
 has-symbol-support-x@^1.4.1:
   version "1.4.1"
   resolved "https://registry.yarnpkg.com/has-symbol-support-x/-/has-symbol-support-x-1.4.1.tgz#66ec2e377e0c7d7ccedb07a3a84d77510ff1bc4c"
@@ -2794,9 +2818,9 @@ jsprim@^1.2.2:
     json-schema "0.2.3"
     verror "1.10.0"
 
-just-extend@^1.1.26:
-  version "1.1.27"
-  resolved "https://registry.yarnpkg.com/just-extend/-/just-extend-1.1.27.tgz#ec6e79410ff914e472652abfa0e603c03d60e905"
+just-extend@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/just-extend/-/just-extend-3.0.0.tgz#cee004031eaabf6406da03a7b84e4fe9d78ef288"
 
 keyv@3.0.0:
   version "3.0.0"
@@ -2979,13 +3003,9 @@ log-update@^1.0.2:
     ansi-escapes "^1.0.0"
     cli-cursor "^1.0.2"
 
-lolex@^1.6.0:
-  version "1.6.0"
-  resolved "https://registry.yarnpkg.com/lolex/-/lolex-1.6.0.tgz#3a9a0283452a47d7439e72731b9e07d7386e49f6"
-
-lolex@^2.2.0:
-  version "2.3.1"
-  resolved "https://registry.yarnpkg.com/lolex/-/lolex-2.3.1.tgz#3d2319894471ea0950ef64692ead2a5318cff362"
+lolex@^2.3.2, lolex@^2.7.4:
+  version "2.7.4"
+  resolved "https://registry.yarnpkg.com/lolex/-/lolex-2.7.4.tgz#6514de2c3291e9d6f09d49ddce4a95f7d4d5a93f"
 
 longest@^1.0.1:
   version "1.0.1"
@@ -3145,13 +3165,13 @@ natural-compare@^1.4.0:
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/natural-compare/-/natural-compare-1.4.0.tgz#4abebfeed7541f2c27acfb29bdbbd15c8d5ba4f7"
 
-nise@^1.2.0:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/nise/-/nise-1.2.0.tgz#079d6cadbbcb12ba30e38f1c999f36ad4d6baa53"
+nise@^1.4.4:
+  version "1.4.4"
+  resolved "https://registry.yarnpkg.com/nise/-/nise-1.4.4.tgz#b8d9dd35334c99e514b75e46fcc38e358caecdd0"
   dependencies:
-    formatio "^1.2.0"
-    just-extend "^1.1.26"
-    lolex "^1.6.0"
+    "@sinonjs/formatio" "^2.0.0"
+    just-extend "^3.0.0"
+    lolex "^2.3.2"
     path-to-regexp "^1.7.0"
     text-encoding "^0.6.4"
 
@@ -3920,7 +3940,7 @@ safe-buffer@^5.0.1, safe-buffer@^5.1.1, safe-buffer@~5.1.0, safe-buffer@~5.1.1:
   version "5.1.1"
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.1.tgz#893312af69b2123def71f57889001671eeb2c853"
 
-samsam@1.x:
+samsam@1.3.0:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/samsam/-/samsam-1.3.0.tgz#8d1d9350e25622da30de3e44ba692b5221ab7c50"
 
@@ -3972,17 +3992,19 @@ 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@^6.3.1:
+  version "6.3.1"
+  resolved "https://registry.yarnpkg.com/sinon/-/sinon-6.3.1.tgz#4b57a52d74d6cc2fb8db17cb3b23356becfa7c1b"
   dependencies:
-    diff "^3.1.0"
-    formatio "1.2.0"
+    "@sinonjs/commons" "^1.0.2"
+    "@sinonjs/formatio" "^2.0.0"
+    "@sinonjs/samsam" "^2.0.0"
+    diff "^3.5.0"
     lodash.get "^4.4.2"
-    lolex "^2.2.0"
-    nise "^1.2.0"
-    supports-color "^4.4.0"
-    type-detect "^4.0.5"
+    lolex "^2.7.4"
+    nise "^1.4.4"
+    supports-color "^5.5.0"
+    type-detect "^4.0.8"
 
 slash@^1.0.0:
   version "1.0.0"
@@ -4201,12 +4223,18 @@ supports-color@^3.1.2:
   dependencies:
     has-flag "^1.0.0"
 
-supports-color@^4.0.0, supports-color@^4.4.0:
+supports-color@^4.0.0:
   version "4.5.0"
   resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-4.5.0.tgz#be7a0de484dec5c5cddf8b3d59125044912f635b"
   dependencies:
     has-flag "^2.0.0"
 
+supports-color@^5.5.0:
+  version "5.5.0"
+  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-5.5.0.tgz#e2e69a44ac8772f78a1ec0b35b689df6530efc8f"
+  dependencies:
+    has-flag "^3.0.0"
+
 symbol-observable@1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/symbol-observable/-/symbol-observable-1.0.1.tgz#8340fc4702c3122df5d22288f88283f513d3fdd4"
@@ -4331,9 +4359,9 @@ type-check@~0.3.2:
   dependencies:
     prelude-ls "~1.1.2"
 
-type-detect@^4.0.5:
-  version "4.0.5"
-  resolved "https://registry.yarnpkg.com/type-detect/-/type-detect-4.0.5.tgz#d70e5bc81db6de2a381bcaca0c6e0cbdc7635de2"
+type-detect@4.0.8, type-detect@^4.0.8:
+  version "4.0.8"
+  resolved "https://registry.yarnpkg.com/type-detect/-/type-detect-4.0.8.tgz#7646fb5f18871cfbb7749e69bd39a6388eb7450c"
 
 typedarray@^0.0.6:
   version "0.0.6"