diff --git a/package-lock.json b/package-lock.json
index 03d22e10..d73d41c4 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2518,9 +2518,9 @@
       "dev": true
     },
     "@types/ws": {
-      "version": "7.2.3",
-      "resolved": "https://registry.npmjs.org/@types/ws/-/ws-7.2.3.tgz",
-      "integrity": "sha512-VT/GK7nvDA7lfHy40G3LKM+ICqmdIsBLBHGXcWD97MtqQEjNMX+7Gudo8YGpaSlYdTX7IFThhCE8Jx09HegymQ==",
+      "version": "7.2.4",
+      "resolved": "https://registry.npmjs.org/@types/ws/-/ws-7.2.4.tgz",
+      "integrity": "sha512-9S6Ask71vujkVyeEXKxjBSUV8ZUB0mjL5la4IncBoheu04bDaYyUKErh1BQcY9+WzOUOiKqz/OnpJHYckbMfNg==",
       "requires": {
         "@types/node": "*"
       }
@@ -3122,15 +3122,6 @@
         }
       }
     },
-    "backbone": {
-      "version": "1.4.0",
-      "resolved": "https://registry.npmjs.org/backbone/-/backbone-1.4.0.tgz",
-      "integrity": "sha512-RLmDrRXkVdouTg38jcgHhyQ/2zjg7a8E6sz2zxfz21Hh17xDJYUHBZimVIt5fUyS8vbfpeSmTL3gUjTEvUV3qQ==",
-      "dev": true,
-      "requires": {
-        "underscore": ">=1.8.3"
-      }
-    },
     "balanced-match": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
@@ -9701,12 +9692,6 @@
       "resolved": "https://registry.npmjs.org/jmespath/-/jmespath-0.15.0.tgz",
       "integrity": "sha1-o/Iiqarp+Wb10nx5ZRDigJF2Qhc="
     },
-    "jquery": {
-      "version": "3.4.1",
-      "resolved": "https://registry.npmjs.org/jquery/-/jquery-3.4.1.tgz",
-      "integrity": "sha512-36+AdBzCL+y6qjw5Tx7HgzeGCzC81MDDgaUP8ld2zhx58HdqXGoBd+tHdrBMiyjGQs0Hxs/MLZTu/eHNJJuWPw==",
-      "dev": true
-    },
     "js-tokens": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-4.0.0.tgz",
@@ -18543,12 +18528,6 @@
         "source-map": "~0.6.1"
       }
     },
-    "underscore": {
-      "version": "1.9.1",
-      "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.9.1.tgz",
-      "integrity": "sha512-5/4etnCkd9c8gwgowi5/om/mYO5ajCaOgdzj/oW+0eQV9WxKBDZw5+ycmKmeaTXjInS/W0BzpGLo2xR2aBwZdg==",
-      "dev": true
-    },
     "union-value": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/union-value/-/union-value-1.0.1.tgz",
diff --git a/package.json b/package.json
index c1719e94..af925ae9 100644
--- a/package.json
+++ b/package.json
@@ -72,7 +72,7 @@
     "@stencila/configa": "^0.4.7",
     "@stencila/logga": "^2.1.0",
     "@stencila/schema": "^0.42.1",
-    "@types/ws": "7.2.3",
+    "@types/ws": "7.2.4",
     "ajv": "^6.12.0",
     "chalk": "^3.0.0",
     "cli-highlight": "^2.1.4",