diff --git a/package-lock.json b/package-lock.json
index 9c9dcc2..a451d82 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9901,7 +9901,8 @@
             "ansi-regex": {
               "version": "2.1.1",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "aproba": {
               "version": "1.2.0",
@@ -10316,7 +10317,8 @@
             "safe-buffer": {
               "version": "5.1.1",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "safer-buffer": {
               "version": "2.1.2",
@@ -10372,6 +10374,7 @@
               "version": "3.0.1",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "ansi-regex": "^2.0.0"
               }
@@ -10415,12 +10418,14 @@
             "wrappy": {
               "version": "1.0.2",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "yallist": {
               "version": "3.0.2",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             }
           }
         },
@@ -14993,9 +14998,9 @@
       "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg=="
     },
     "sass": {
-      "version": "1.15.2",
-      "resolved": "https://registry.npmjs.org/sass/-/sass-1.15.2.tgz",
-      "integrity": "sha512-YFncPpx3ewKEhMg9sWdCxKUpPN/jwVLa0Q9iO2tcV5Y5Z/YAlFV6k6JaQwq3tmbN6FXKjUYElXRHcG0g4D1zkQ==",
+      "version": "1.15.3",
+      "resolved": "https://registry.npmjs.org/sass/-/sass-1.15.3.tgz",
+      "integrity": "sha512-9e6zdkLEjMAX/zXUWKs9GreDLFYozFOEu4gMZBZpkp+AiQgaofimqGZm9qMhS5V+4V2OWBapnM5xoJn2Rw9pQg==",
       "dev": true,
       "requires": {
         "chokidar": "^2.0.0"
@@ -15235,8 +15240,7 @@
             "ansi-regex": {
               "version": "2.1.1",
               "bundled": true,
-              "dev": true,
-              "optional": true
+              "dev": true
             },
             "aproba": {
               "version": "1.2.0",
@@ -15300,6 +15304,15 @@
               "dev": true,
               "optional": true
             },
+            "debug": {
+              "version": "2.6.9",
+              "bundled": true,
+              "dev": true,
+              "optional": true,
+              "requires": {
+                "ms": "2.0.0"
+              }
+            },
             "deep-extend": {
               "version": "0.5.1",
               "bundled": true,
@@ -15469,7 +15482,9 @@
             },
             "ms": {
               "version": "2.0.0",
-              "bundled": true
+              "bundled": true,
+              "dev": true,
+              "optional": true
             },
             "needle": {
               "version": "2.2.0",
@@ -15640,8 +15655,7 @@
             "safe-buffer": {
               "version": "5.1.1",
               "bundled": true,
-              "dev": true,
-              "optional": true
+              "dev": true
             },
             "safer-buffer": {
               "version": "2.1.2",
@@ -15697,7 +15711,6 @@
               "version": "3.0.1",
               "bundled": true,
               "dev": true,
-              "optional": true,
               "requires": {
                 "ansi-regex": "^2.0.0"
               }
@@ -15741,14 +15754,12 @@
             "wrappy": {
               "version": "1.0.2",
               "bundled": true,
-              "dev": true,
-              "optional": true
+              "dev": true
             },
             "yallist": {
               "version": "3.0.2",
               "bundled": true,
-              "dev": true,
-              "optional": true
+              "dev": true
             }
           }
         },
@@ -15882,9 +15893,9 @@
           }
         },
         "nan": {
-          "version": "2.12.0",
-          "resolved": "https://registry.npmjs.org/nan/-/nan-2.12.0.tgz",
-          "integrity": "sha512-zT5nC0JhbljmyEf+Z456nvm7iO7XgRV2hYxoBtPpnyp+0Q4aCoP6uWNn76v/I6k2kCYNLWqWbwBWQcjsNI/bjw==",
+          "version": "2.12.1",
+          "resolved": "https://registry.npmjs.org/nan/-/nan-2.12.1.tgz",
+          "integrity": "sha512-JY7V6lRkStKcKTvHO5NVSQRv+RV+FIL5pvDoLiAtSL9pKlC5x9PKQcZDsq7m4FO4d57mkhC6Z+QhAh3Jdk5JFw==",
           "dev": true,
           "optional": true
         }
@@ -19778,7 +19789,8 @@
             "ansi-regex": {
               "version": "2.1.1",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "aproba": {
               "version": "1.2.0",
@@ -20193,7 +20205,8 @@
             "safe-buffer": {
               "version": "5.1.1",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "safer-buffer": {
               "version": "2.1.2",
@@ -20249,6 +20262,7 @@
               "version": "3.0.1",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "ansi-regex": "^2.0.0"
               }
@@ -20292,12 +20306,14 @@
             "wrappy": {
               "version": "1.0.2",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "yallist": {
               "version": "3.0.2",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             }
           }
         },
@@ -21192,7 +21208,8 @@
             "ansi-regex": {
               "version": "2.1.1",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "aproba": {
               "version": "1.2.0",
@@ -21607,7 +21624,8 @@
             "safe-buffer": {
               "version": "5.1.1",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "safer-buffer": {
               "version": "2.1.2",
@@ -21663,6 +21681,7 @@
               "version": "3.0.1",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "ansi-regex": "^2.0.0"
               }
@@ -21706,12 +21725,14 @@
             "wrappy": {
               "version": "1.0.2",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "yallist": {
               "version": "3.0.2",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             }
           }
         },
diff --git a/package.json b/package.json
index 158014f..081f4a7 100644
--- a/package.json
+++ b/package.json
@@ -61,7 +61,7 @@
 	},
 	"devDependencies": {
 		"pressbooks-build-tools": "^1.2.0",
-		"sass": "^1.15.2",
+		"sass": "^1.15.3",
 		"sass-loader": "^7.1.0",
 		"vue-template-compiler": "^2.5.21"
 	},