diff --git a/.travis.yml b/.travis.yml
index fb8b7c5..0f161f7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,6 +16,15 @@ env:
   - CHAI_VERSION=^2.0.0 SINON_VERSION=^3.0.0
   - CHAI_VERSION=^3.0.0 SINON_VERSION=^3.0.0
   - CHAI_VERSION=^4.0.0 SINON_VERSION=^3.0.0
+  - CHAI_VERSION=^1.9.2 SINON_VERSION=^4.0.0
+  - CHAI_VERSION=^2.0.0 SINON_VERSION=^4.0.0
+  - CHAI_VERSION=^3.0.0 SINON_VERSION=^4.0.0
+  - CHAI_VERSION=^4.0.0 SINON_VERSION=^4.0.0
 script:
   - test $TRAVIS_NODE_VERSION == "0.10" || npm run lint
   - npm run test-travis
+before_install:
+  - if [ `npm -v` = "5.3.0" ]; then
+      npm install -g npm@^5.4.2;
+      npm -v;
+    fi
diff --git a/package-lock.json b/package-lock.json
index e34578d..692f0cb 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1108,6 +1108,12 @@
         "lodash._isiterateecall": "3.0.9"
       }
     },
+    "lodash.get": {
+      "version": "4.4.2",
+      "resolved": "https://registry.npmjs.org/lodash.get/-/lodash.get-4.4.2.tgz",
+      "integrity": "sha1-LRd/ZS+jHpObRDjVNBSZ36OCXpk=",
+      "dev": true
+    },
     "lodash.isarguments": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/lodash.isarguments/-/lodash.isarguments-3.1.0.tgz",
@@ -1235,26 +1241,6 @@
       "integrity": "sha1-Sr6/7tdUHywnrPspvbvRXI1bpPc=",
       "dev": true
     },
-    "nise": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/nise/-/nise-1.0.1.tgz",
-      "integrity": "sha1-DakrEKhU6XwPSW9sKEWjASgLPu8=",
-      "dev": true,
-      "requires": {
-        "formatio": "1.2.0",
-        "just-extend": "1.1.22",
-        "lolex": "1.6.0",
-        "path-to-regexp": "1.7.0"
-      },
-      "dependencies": {
-        "lolex": {
-          "version": "1.6.0",
-          "resolved": "https://registry.npmjs.org/lolex/-/lolex-1.6.0.tgz",
-          "integrity": "sha1-OpoCg0UqR9dDnnJzG54H1zhuSfY=",
-          "dev": true
-        }
-      }
-    },
     "nopt": {
       "version": "3.0.6",
       "resolved": "https://registry.npmjs.org/nopt/-/nopt-3.0.6.tgz",
@@ -1555,20 +1541,44 @@
       }
     },
     "sinon": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/sinon/-/sinon-3.0.0.tgz",
-      "integrity": "sha512-oGoqOflgmoKm+lHkGsUw5IjxOu3Nat0WfoJpWFj8sklC1KDCGamkg/nDJGJAv9hXLY5KiflDoY/7ewgfsbNLTA==",
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/sinon/-/sinon-4.0.0.tgz",
+      "integrity": "sha1-pUpfAjeqHdIhXl6ByJtCtQxP22s=",
       "dev": true,
       "requires": {
         "diff": "3.2.0",
         "formatio": "1.2.0",
+        "lodash.get": "4.4.2",
         "lolex": "2.1.2",
         "native-promise-only": "0.8.1",
-        "nise": "1.0.1",
+        "nise": "1.1.0",
         "path-to-regexp": "1.7.0",
         "samsam": "1.2.1",
         "text-encoding": "0.6.4",
         "type-detect": "4.0.3"
+      },
+      "dependencies": {
+        "nise": {
+          "version": "1.1.0",
+          "resolved": "https://registry.npmjs.org/nise/-/nise-1.1.0.tgz",
+          "integrity": "sha512-lIFidCxB0mJGyq1i33tLRNojtMoYX95EAI7WQEU+/ees0w6hvXZQHZ7WD130Tjeh5+YJAUVLfQ3k/s9EA8jj+w==",
+          "dev": true,
+          "requires": {
+            "formatio": "1.2.0",
+            "just-extend": "1.1.22",
+            "lolex": "1.6.0",
+            "path-to-regexp": "1.7.0",
+            "text-encoding": "0.6.4"
+          },
+          "dependencies": {
+            "lolex": {
+              "version": "1.6.0",
+              "resolved": "https://registry.npmjs.org/lolex/-/lolex-1.6.0.tgz",
+              "integrity": "sha1-OpoCg0UqR9dDnnJzG54H1zhuSfY=",
+              "dev": true
+            }
+          }
+        }
       }
     },
     "slice-ansi": {
@@ -1593,15 +1603,6 @@
       "integrity": "sha1-BOaSb2YolTVPPdAVIDYzuFcpfiw=",
       "dev": true
     },
-    "string_decoder": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.0.2.tgz",
-      "integrity": "sha1-sp4fThEl+pehA4K4pTNze3SR4Xk=",
-      "dev": true,
-      "requires": {
-        "safe-buffer": "5.0.1"
-      }
-    },
     "string-width": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
@@ -1613,6 +1614,15 @@
         "strip-ansi": "3.0.1"
       }
     },
+    "string_decoder": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.0.2.tgz",
+      "integrity": "sha1-sp4fThEl+pehA4K4pTNze3SR4Xk=",
+      "dev": true,
+      "requires": {
+        "safe-buffer": "5.0.1"
+      }
+    },
     "strip-ansi": {
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
diff --git a/package.json b/package.json
index 183b402..92e39a8 100644
--- a/package.json
+++ b/package.json
@@ -29,15 +29,14 @@
   },
   "peerDependencies": {
     "chai": ">=1.9.2 <5",
-    "sinon": "^1.4.0 || ^2.1.0 || ^3.0.0"
+    "sinon": "^1.4.0 || ^2.1.0 || ^3.0.0 || ^4.0.0"
   },
   "devDependencies": {
     "chai": "^4.1.0",
     "eslint": "^3.19.0",
     "istanbul": "~0.4.5",
-    "lolex": "^2.1.2",
     "mocha": "^3.4.2",
     "opener": "^1.4.3",
-    "sinon": "^3.0.0"
+    "sinon": "^4.0.0"
   }
 }