diff --git a/package.json b/package.json
index c2343c1..2e6c4ea 100644
--- a/package.json
+++ b/package.json
@@ -69,7 +69,7 @@
     "js-devbox": "^5.0.0",
     "mocha": "^4.0.1",
     "nyc": "^11.4.1",
-    "proxyquire": "^1.7.11",
+    "proxyquire": "^2.0.0",
     "sinon": "^4.1.3"
   },
   "jest": {
diff --git a/yarn.lock b/yarn.lock
index 535a64c..d12249e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1290,14 +1290,10 @@ detect-newline@^2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/detect-newline/-/detect-newline-2.1.0.tgz#f41f1c10be4b00e87b5f13da680759f2c5bfd3e2"
 
-diff@3.3.1:
+diff@3.3.1, diff@^3.1.0, diff@^3.2.0:
   version "3.3.1"
   resolved "https://registry.yarnpkg.com/diff/-/diff-3.3.1.tgz#aa8567a6eed03c531fc89d3f711cd0e5259dec75"
 
-diff@^3.1.0, diff@^3.2.0:
-  version "3.4.0"
-  resolved "https://registry.yarnpkg.com/diff/-/diff-3.4.0.tgz#b1d85507daf3964828de54b37d0d73ba67dda56c"
-
 doctrine@1.5.0:
   version "1.5.0"
   resolved "https://registry.yarnpkg.com/doctrine/-/doctrine-1.5.0.tgz#379dce730f6166f76cefa4e6707a159b02c5a6fa"
@@ -1594,14 +1590,10 @@ extglob@^0.3.1:
   dependencies:
     is-extglob "^1.0.0"
 
-extsprintf@1.3.0:
+extsprintf@1.3.0, extsprintf@^1.2.0:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/extsprintf/-/extsprintf-1.3.0.tgz#96918440e3041a7a414f8c52e3c574eb3c3e1e05"
 
-extsprintf@^1.2.0:
-  version "1.4.0"
-  resolved "https://registry.yarnpkg.com/extsprintf/-/extsprintf-1.4.0.tgz#e2689f8f356fad62cca65a3a91c5df5f9551692f"
-
 fast-deep-equal@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/fast-deep-equal/-/fast-deep-equal-1.0.0.tgz#96256a3bc975595eb36d82e9929d060d893439ff"
@@ -3578,9 +3570,9 @@ progress@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/progress/-/progress-2.0.0.tgz#8a1be366bf8fc23db2bd23f10c6fe920b4389d1f"
 
-proxyquire@^1.7.11:
-  version "1.8.0"
-  resolved "https://registry.yarnpkg.com/proxyquire/-/proxyquire-1.8.0.tgz#02d514a5bed986f04cbb2093af16741535f79edc"
+proxyquire@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/proxyquire/-/proxyquire-2.0.0.tgz#9803bf37b64d538b7ab05c53e839d1ab315905e3"
   dependencies:
     fill-keys "^1.0.2"
     module-not-found-error "^1.0.0"