diff --git a/package-lock.json b/package-lock.json
index f5bfeb4..631da6c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1534,11 +1534,6 @@
 			"integrity": "sha512-z/WhQ5FPySLdvREByI2vZiTWwCnF0moMJ1hK9YQwDTHKh6I7/uSckMetoRGb5UBZPC1z0jlw+n/XCgjeH7y1AQ==",
 			"dev": true
 		},
-		"async-limiter": {
-			"version": "1.0.0",
-			"resolved": "https://registry.npmjs.org/async-limiter/-/async-limiter-1.0.0.tgz",
-			"integrity": "sha512-jp/uFnooOiO+L211eZOoSyzpOITMXx1rBITauYykG3BRYPu8h0UcxsPNB04RR5vo4Tyz3+ay17tR6JVf9qzYWg=="
-		},
 		"atob": {
 			"version": "2.1.2",
 			"resolved": "https://registry.npmjs.org/atob/-/atob-2.1.2.tgz",
@@ -4233,7 +4228,8 @@
 				"ansi-regex": {
 					"version": "2.1.1",
 					"bundled": true,
-					"dev": true
+					"dev": true,
+					"optional": true
 				},
 				"aproba": {
 					"version": "1.2.0",
@@ -4254,12 +4250,14 @@
 				"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"
@@ -4274,17 +4272,20 @@
 				"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",
@@ -4401,7 +4402,8 @@
 				"inherits": {
 					"version": "2.0.3",
 					"bundled": true,
-					"dev": true
+					"dev": true,
+					"optional": true
 				},
 				"ini": {
 					"version": "1.3.5",
@@ -4413,6 +4415,7 @@
 					"version": "1.0.0",
 					"bundled": true,
 					"dev": true,
+					"optional": true,
 					"requires": {
 						"number-is-nan": "^1.0.0"
 					}
@@ -4427,6 +4430,7 @@
 					"version": "3.0.4",
 					"bundled": true,
 					"dev": true,
+					"optional": true,
 					"requires": {
 						"brace-expansion": "^1.1.7"
 					}
@@ -4434,12 +4438,14 @@
 				"minimist": {
 					"version": "0.0.8",
 					"bundled": true,
-					"dev": true
+					"dev": true,
+					"optional": true
 				},
 				"minipass": {
 					"version": "2.3.5",
 					"bundled": true,
 					"dev": true,
+					"optional": true,
 					"requires": {
 						"safe-buffer": "^5.1.2",
 						"yallist": "^3.0.0"
@@ -4458,6 +4464,7 @@
 					"version": "0.5.1",
 					"bundled": true,
 					"dev": true,
+					"optional": true,
 					"requires": {
 						"minimist": "0.0.8"
 					}
@@ -4538,7 +4545,8 @@
 				"number-is-nan": {
 					"version": "1.0.1",
 					"bundled": true,
-					"dev": true
+					"dev": true,
+					"optional": true
 				},
 				"object-assign": {
 					"version": "4.1.1",
@@ -4550,6 +4558,7 @@
 					"version": "1.4.0",
 					"bundled": true,
 					"dev": true,
+					"optional": true,
 					"requires": {
 						"wrappy": "1"
 					}
@@ -4635,7 +4644,8 @@
 				"safe-buffer": {
 					"version": "5.1.2",
 					"bundled": true,
-					"dev": true
+					"dev": true,
+					"optional": true
 				},
 				"safer-buffer": {
 					"version": "2.1.2",
@@ -4671,6 +4681,7 @@
 					"version": "1.0.2",
 					"bundled": true,
 					"dev": true,
+					"optional": true,
 					"requires": {
 						"code-point-at": "^1.0.0",
 						"is-fullwidth-code-point": "^1.0.0",
@@ -4690,6 +4701,7 @@
 					"version": "3.0.1",
 					"bundled": true,
 					"dev": true,
+					"optional": true,
 					"requires": {
 						"ansi-regex": "^2.0.0"
 					}
@@ -4733,12 +4745,14 @@
 				"wrappy": {
 					"version": "1.0.2",
 					"bundled": true,
-					"dev": true
+					"dev": true,
+					"optional": true
 				},
 				"yallist": {
 					"version": "3.0.3",
 					"bundled": true,
-					"dev": true
+					"dev": true,
+					"optional": true
 				}
 			}
 		},
@@ -9068,12 +9082,9 @@
 			}
 		},
 		"ws": {
-			"version": "7.0.1",
-			"resolved": "https://registry.npmjs.org/ws/-/ws-7.0.1.tgz",
-			"integrity": "sha512-ILHfMbuqLJvnSgYXLgy4kMntroJpe8hT41dOVWM8bxRuw6TK4mgMp9VJUNsZTEc5Bh+Mbs0DJT4M0N+wBG9l9A==",
-			"requires": {
-				"async-limiter": "^1.0.0"
-			}
+			"version": "7.4.6",
+			"resolved": "https://registry.npmjs.org/ws/-/ws-7.4.6.tgz",
+			"integrity": "sha512-YmhHDO4MzaDLB+M9ym/mDA5z0naX8j7SIlT8f8z+I0VtzsRbekxEutHSme7NPS2qE8StCYQNUnfWdXta/Yu85A=="
 		},
 		"xdg-basedir": {
 			"version": "3.0.0",
diff --git a/package.json b/package.json
index 993cbdb..8f69ecf 100644
--- a/package.json
+++ b/package.json
@@ -46,7 +46,7 @@
 		"react": "^16.8.6",
 		"react-dom": "^16.8.6",
 		"sharedb": "^1.0.0-beta.23",
-		"ws": "^7.0.0"
+		"ws": "^7.4.6"
 	},
 	"ava": {
 		"require": [