diff --git a/package-lock.json b/package-lock.json
index 79faaa0..99937dc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -758,6 +758,7 @@
       "resolved": "https://registry.npmjs.org/align-text/-/align-text-0.1.4.tgz",
       "integrity": "sha1-DNkKVhCT810KmSVsIrcGlDP60Rc=",
       "dev": true,
+      "optional": true,
       "requires": {
         "kind-of": "^3.0.2",
         "longest": "^1.0.1",
@@ -5042,12 +5043,14 @@
         "balanced-match": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "brace-expansion": {
           "version": "1.1.11",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "balanced-match": "^1.0.0",
             "concat-map": "0.0.1"
@@ -5062,17 +5065,20 @@
         "code-point-at": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "concat-map": {
           "version": "0.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "console-control-strings": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "core-util-is": {
           "version": "1.0.2",
@@ -5189,7 +5195,8 @@
         "inherits": {
           "version": "2.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "ini": {
           "version": "1.3.5",
@@ -5201,6 +5208,7 @@
           "version": "1.0.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "number-is-nan": "^1.0.0"
           }
@@ -5215,6 +5223,7 @@
           "version": "3.0.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "brace-expansion": "^1.1.7"
           }
@@ -5222,12 +5231,14 @@
         "minimist": {
           "version": "0.0.8",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "minipass": {
           "version": "2.2.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "safe-buffer": "^5.1.1",
             "yallist": "^3.0.0"
@@ -5246,6 +5257,7 @@
           "version": "0.5.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "minimist": "0.0.8"
           }
@@ -5326,7 +5338,8 @@
         "number-is-nan": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "object-assign": {
           "version": "4.1.1",
@@ -5338,6 +5351,7 @@
           "version": "1.4.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "wrappy": "1"
           }
@@ -5459,6 +5473,7 @@
           "version": "1.0.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "code-point-at": "^1.0.0",
             "is-fullwidth-code-point": "^1.0.0",
@@ -9378,7 +9393,8 @@
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/longest/-/longest-1.0.1.tgz",
       "integrity": "sha1-MKCy2jj3N3DoKUoNIuZiXtd9AJc=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "loose-envify": {
       "version": "1.4.0",
@@ -12835,9 +12851,9 @@
       }
     },
     "rollup": {
-      "version": "0.67.4",
-      "resolved": "https://registry.npmjs.org/rollup/-/rollup-0.67.4.tgz",
-      "integrity": "sha512-AVuP73mkb4BBMUmksQ3Jw0jTrBTU1i7rLiUYjFxLZGb3xiFmtVEg40oByphkZAsiL0bJC3hRAJUQos/e5EBd+w==",
+      "version": "0.68.0",
+      "resolved": "https://registry.npmjs.org/rollup/-/rollup-0.68.0.tgz",
+      "integrity": "sha512-UbmntCf8QBlOqJnwsNWQCI0oonHOgs9y1OLoO8BHf2r8gCyRLp3JzLHXARJpsNDAS08Qm3LDjzyWma5sqnCxDQ==",
       "dev": true,
       "requires": {
         "@types/estree": "0.0.39",
@@ -13570,7 +13586,7 @@
       "dependencies": {
         "source-map": {
           "version": "0.4.4",
-          "resolved": "http://registry.npmjs.org/source-map/-/source-map-0.4.4.tgz",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.4.4.tgz",
           "integrity": "sha1-66T12pwNyZneaAMti092FzZSA2s=",
           "dev": true,
           "requires": {
diff --git a/package.json b/package.json
index cf26d1e..432d576 100644
--- a/package.json
+++ b/package.json
@@ -87,7 +87,7 @@
     "postcss-strip-inline-comments": "^0.1.5",
     "pump": "^3.0.0",
     "raw-loader": "^0.5.1",
-    "rollup": "^0.67.4",
+    "rollup": "^0.68.0",
     "rollup-plugin-commonjs": "^9.2.0",
     "rollup-plugin-node-resolve": "^3.4.0",
     "rollup-plugin-sourcemaps": "^0.4.2",