diff --git a/package.json b/package.json
index b0f19e8609..125c48f6e3 100644
--- a/package.json
+++ b/package.json
@@ -84,7 +84,7 @@
     "networked-aframe": "github:mozillareality/networked-aframe#master",
     "nipplejs": "github:mozillareality/nipplejs#mr-social-client/master",
     "node-ensure": "0.0.0",
-    "pdfjs-dist": "^2.1.266",
+    "pdfjs-dist": "^2.4.456",
     "phoenix": "github:gfodor/phoenix-js#master",
     "raven-js": "^3.20.1",
     "react": "^16.1.1",
@@ -116,12 +116,12 @@
     "@babel/register": "^7.0.0",
     "ava": "^1.4.1",
     "babel-eslint": "^10.0.1",
-    "babel-loader": "^8.0.5",
+    "babel-loader": "^8.2.4",
     "babel-plugin-react-intl": "^3.0.1",
     "babel-plugin-transform-react-jsx-img-import": "^0.1.4",
-    "copy-webpack-plugin": "^4.5.1",
+    "copy-webpack-plugin": "^6.0.0",
     "cors": "^2.8.4",
-    "css-loader": "^1.0.0",
+    "css-loader": "^4.0.0",
     "dotenv": "^5.0.1",
     "eslint": "^5.16.0",
     "eslint-config-prettier": "^2.9.0",
@@ -129,13 +129,13 @@
     "eslint-plugin-react": "^7.10.0",
     "esm": "^3.2.5",
     "fast-plural-rules": "0.0.3",
-    "file-loader": "^1.1.10",
-    "html-loader": "^0.5.5",
-    "html-webpack-plugin": "^3.1.0",
+    "file-loader": "^6.0.0",
+    "html-loader": "^1.0.0",
+    "html-webpack-plugin": "^5.0.0",
     "htmlhint": "^0.11.0",
     "jsdom": "^15.1.1",
     "localstorage-memory": "^1.0.3",
-    "mini-css-extract-plugin": "^0.8.0",
+    "mini-css-extract-plugin": "^1.0.0",
     "ncp": "^2.0.0",
     "node-fetch": "^2.6.0",
 
@@ -144,21 +144,21 @@
     "prettier": "^1.7.0",
     "raw-loader": "^0.5.1",
     "rimraf": "^2.6.2",
-    "sass-loader": "^6.0.7",
+    "sass-loader": "^9.0.0",
     "selfsigned": "^1.10.2",
     "shelljs": "^0.8.1",
     "spritesheet-js": "github:mozillareality/spritesheet.js#hubs/master",
-    "style-loader": "^0.20.2",
+    "style-loader": "^1.1.4",
     "stylelint": "^9.10.1",
     "stylelint-config-recommended-scss": "^3.2.0",
     "stylelint-scss": "^3.5.3",
     "svg-inline-loader": "^0.8.0",
     "tar": "^5.0.5",
-    "url-loader": "^1.0.1",
-    "webpack": "^4.32.2",
+    "url-loader": "^4.0.0",
+    "webpack": "^5.0.0",
     "webpack-bundle-analyzer": "^4.0.0",
-    "webpack-cli": "^3.2.3",
+    "webpack-cli": "^4.0.0",
     "webpack-dev-server": "^3.1.14",
-    "worker-loader": "^2.0.0"
+    "worker-loader": "^3.0.0"
   }
 }