diff --git a/package-lock.json b/package-lock.json
index 136ed0f..92ed198 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -564,6 +564,7 @@
       "resolved": "https://registry.npmjs.org/boom/-/boom-2.10.1.tgz",
       "integrity": "sha1-OciRjO/1eZ+D+UkqhI9iWt0Mdm8=",
       "dev": true,
+      "optional": true,
       "requires": {
         "hoek": "2.x.x"
       }
@@ -1799,7 +1800,8 @@
       "version": "2.16.3",
       "resolved": "https://registry.npmjs.org/hoek/-/hoek-2.16.3.tgz",
       "integrity": "sha1-ILt0A9POo5jpHcRxCo/xuCdKJe0=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "hoist-non-react-statics": {
       "version": "2.5.0",
@@ -3202,9 +3204,9 @@
       }
     },
     "prismjs": {
-      "version": "1.14.0",
-      "resolved": "https://registry.npmjs.org/prismjs/-/prismjs-1.14.0.tgz",
-      "integrity": "sha512-sa2s4m60bXs+kU3jcuUwx3ZCrUH7o0kuqnOOINbODqlRrDB7KY8SRx+xR/D7nHLlgfDdG7zXbRO8wJ+su5Ls0A==",
+      "version": "1.21.0",
+      "resolved": "https://registry.npmjs.org/prismjs/-/prismjs-1.21.0.tgz",
+      "integrity": "sha512-uGdSIu1nk3kej2iZsLyDoJ7e9bnPzIgY0naW/HdknGj61zScaprVEVGHrPoXqI+M9sP0NDnTK2jpkvmldpuqDw==",
       "requires": {
         "clipboard": "^2.0.0"
       }