diff --git a/install/ubuntu-2004.sh b/install/ubuntu-2004.sh
index d576d81c..241d1070 100644
--- a/install/ubuntu-2004.sh
+++ b/install/ubuntu-2004.sh
@@ -9,8 +9,8 @@ echo "apt-get update"
 apt-get -qq update
 echo "apt-get install curl wget gnupg -y"
 apt-get install -y curl wget gnupg >/dev/null
-apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 9DA31620334BD75D9DCB49F368818C72E52529D4
-echo "deb [ arch=amd64 ] https://repo.mongodb.org/apt/ubuntu $name/mongodb-org/4.0 multiverse" | tee /etc/apt/sources.list.d/mongodb-org-4.0.list
+wget -qO - https://www.mongodb.org/static/pgp/server-4.4.asc | apt-key add -
+echo "deb [ arch=amd64 ] https://repo.mongodb.org/apt/ubuntu $name/mongodb-org/4.4 multiverse" | tee /etc/apt/sources.list.d/mongodb-org-4.4.list
 echo "apt-get update"
 apt-get -qq update
 mkdir -p /data/db /data/file
diff --git a/package.json b/package.json
index 92d2bd47..96a05168 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
         "@shelf/jest-mongodb": "^1.2.3",
         "@types/cross-spawn": "^6.0.2",
         "@types/jest": "^26.0.19",
-        "@types/node": "^14.14.14",
+        "@types/node": "^14.14.16",
         "@types/semver": "^7.3.4",
         "@typescript-eslint/eslint-plugin": "^3.9.1",
         "@typescript-eslint/parser": "^3.9.1",
diff --git a/packages/hydrojudge/package.json b/packages/hydrojudge/package.json
index 64fff20d..4739acb8 100644
--- a/packages/hydrojudge/package.json
+++ b/packages/hydrojudge/package.json
@@ -23,7 +23,7 @@
     "license": "AGPL-3.0-only",
     "devDependencies": {
         "@types/bson": "^4.0.2",
-        "@types/fs-extra": "^9.0.5",
+        "@types/fs-extra": "^9.0.6",
         "@types/js-yaml": "^3.12.5",
         "@types/shell-quote": "^1.7.0"
     },
diff --git a/packages/hydrooj/hydro.png b/packages/hydrooj/hydro.png
new file mode 100644
index 00000000..86b7b457
Binary files /dev/null and b/packages/hydrooj/hydro.png differ
diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index 691de15b..049d5572 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -38,12 +38,12 @@
     },
     "devDependencies": {
         "@types/adm-zip": "^0.4.33",
-        "@types/fs-extra": "^9.0.5",
+        "@types/fs-extra": "^9.0.6",
         "@types/js-yaml": "^3.12.5",
         "@types/koa": "^2.11.4",
         "@types/koa-router": "^7.4.1",
         "@types/koa-static-cache": "^5.1.0",
-        "@types/lodash": "^4.14.165",
+        "@types/lodash": "^4.14.166",
         "@types/lru-cache": "^5.1.0",
         "@types/minio": "^7.0.6",
         "@types/mongodb": "^3.5.33",