diff --git a/package-lock.json b/package-lock.json
index 91d0808..cc2bb87 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -344,6 +344,7 @@
       "resolved": "https://registry.npmjs.org/align-text/-/align-text-0.1.4.tgz",
       "integrity": "sha1-DNkKVhCT810KmSVsIrcGlDP60Rc=",
       "dev": true,
+      "optional": true,
       "requires": {
         "kind-of": "3.2.2",
         "longest": "1.0.1",
@@ -3752,6 +3753,7 @@
           "version": "0.0.9",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "inherits": "2.0.3"
           }
@@ -3776,7 +3778,8 @@
         "buffer-shims": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "caseless": {
           "version": "0.12.0",
@@ -3793,12 +3796,14 @@
         "code-point-at": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "combined-stream": {
           "version": "1.0.5",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "delayed-stream": "1.0.0"
           }
@@ -3811,17 +3816,20 @@
         "console-control-strings": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "core-util-is": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "cryptiles": {
           "version": "2.0.5",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "boom": "2.10.1"
           }
@@ -3861,7 +3869,8 @@
         "delayed-stream": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "delegates": {
           "version": "1.0.0",
@@ -3893,7 +3902,8 @@
         "extsprintf": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "forever-agent": {
           "version": "0.6.1",
@@ -4016,6 +4026,7 @@
           "version": "3.1.3",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "boom": "2.10.1",
             "cryptiles": "2.0.5",
@@ -4063,6 +4074,7 @@
           "version": "1.0.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "number-is-nan": "1.0.1"
           }
@@ -4076,7 +4088,8 @@
         "isarray": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "isstream": {
           "version": "0.1.2",
@@ -4149,12 +4162,14 @@
         "mime-db": {
           "version": "1.27.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "mime-types": {
           "version": "2.1.15",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "mime-db": "1.27.0"
           }
@@ -4230,7 +4245,8 @@
         "number-is-nan": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "oauth-sign": {
           "version": "0.8.2",
@@ -4288,7 +4304,8 @@
         "process-nextick-args": {
           "version": "1.0.7",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "punycode": {
           "version": "1.4.1",
@@ -4326,6 +4343,7 @@
           "version": "2.2.9",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "buffer-shims": "1.0.0",
             "core-util-is": "1.0.2",
@@ -4377,7 +4395,8 @@
         "safe-buffer": {
           "version": "5.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "semver": {
           "version": "5.3.0",
@@ -4401,6 +4420,7 @@
           "version": "1.0.9",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "hoek": "2.16.3"
           }
@@ -4434,6 +4454,7 @@
           "version": "1.0.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "code-point-at": "1.1.0",
             "is-fullwidth-code-point": "1.0.0",
@@ -4444,6 +4465,7 @@
           "version": "1.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "safe-buffer": "5.0.1"
           }
@@ -4472,6 +4494,7 @@
           "version": "2.2.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "block-stream": "0.0.9",
             "fstream": "1.0.11",
@@ -4527,7 +4550,8 @@
         "util-deprecate": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "uuid": {
           "version": "3.0.1",
@@ -9346,14 +9370,31 @@
       }
     },
     "rollup-plugin-node-resolve": {
-      "version": "3.0.3",
-      "resolved": "https://registry.npmjs.org/rollup-plugin-node-resolve/-/rollup-plugin-node-resolve-3.0.3.tgz",
-      "integrity": "sha512-qJLXJ1aASV6p8SrEfRdQdHmb5OQmqXyIWIdVGcju8QFzftSsHcuL554Vy+n8mr0fZCC+ksO6aWJ7TAVl2F+Qwg==",
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/rollup-plugin-node-resolve/-/rollup-plugin-node-resolve-4.0.0.tgz",
+      "integrity": "sha512-7Ni+/M5RPSUBfUaP9alwYQiIKnKeXCOHiqBpKUl9kwp3jX5ZJtgXAait1cne6pGEVUUztPD6skIKH9Kq9sNtfw==",
       "dev": true,
       "requires": {
-        "builtin-modules": "1.1.1",
-        "is-module": "1.0.0",
-        "resolve": "1.5.0"
+        "builtin-modules": "^3.0.0",
+        "is-module": "^1.0.0",
+        "resolve": "^1.8.1"
+      },
+      "dependencies": {
+        "builtin-modules": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/builtin-modules/-/builtin-modules-3.0.0.tgz",
+          "integrity": "sha512-hMIeU4K2ilbXV6Uv93ZZ0Avg/M91RaKXucQ+4me2Do1txxBDyDZWCBa5bJSLqoNTRpXTLwEzIk1KmloenDDjhg==",
+          "dev": true
+        },
+        "resolve": {
+          "version": "1.8.1",
+          "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.8.1.tgz",
+          "integrity": "sha512-AicPrAC7Qu1JxPCZ9ZgCZlY35QgFnNqc+0LtbRNxnVw4TXvjQ72wnuL9JQcEBgXkI9JM8MsT9kaQoHcpCRJOYA==",
+          "dev": true,
+          "requires": {
+            "path-parse": "^1.0.5"
+          }
+        }
       }
     },
     "rollup-plugin-sourcemaps": {
diff --git a/package.json b/package.json
index ae2ab39..107cb85 100644
--- a/package.json
+++ b/package.json
@@ -112,7 +112,7 @@
     "rimraf": "^2.6.1",
     "rollup": "^0.56.3",
     "rollup-plugin-commonjs": "^9.0.0",
-    "rollup-plugin-node-resolve": "^3.0.0",
+    "rollup-plugin-node-resolve": "^4.0.0",
     "rollup-plugin-sourcemaps": "^0.4.2",
     "rollup-plugin-typescript2": "^0.12.0",
     "rxjs": "^5.5.6",