diff --git a/package.json b/package.json
index f38e832..329fb24 100644
--- a/package.json
+++ b/package.json
@@ -17,7 +17,7 @@
     "types": "dist/server/index.d.ts",
     "dependencies": {
         "@akala/core": "^2.0.100",
-        "@akala/server": "^3.0.27",
+        "@akala/server": "^4.0.0",
         "mongodb": "^3.3.2",
         "reflect-metadata": "^0.1.13",
         "sequelize": "^5.19.0",
diff --git a/yarn.lock b/yarn.lock
index 65376dc..a9e1085 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2,17 +2,18 @@
 # yarn lockfile v1
 
 
-"@akala/commands@^0.4.6":
-  version "0.4.6"
-  resolved "https://registry.yarnpkg.com/@akala/commands/-/commands-0.4.6.tgz#06aec84741f4a15b0691152061afa21451a3f713"
-  integrity sha512-hg0E7IW8OXpPbh09n3V1A67EBz01IHk5F6UzyKBYP2EC3ckQ2nI1bvwxC+N5Shg912zG6gztd4CETIcesstNSA==
+"@akala/commands@^0.4.30":
+  version "0.4.30"
+  resolved "https://registry.yarnpkg.com/@akala/commands/-/commands-0.4.30.tgz#291875086860795f15979ff5d7ddf726b70602b1"
+  integrity sha512-Dk9ai4rzOaWguh3ebX2PULfDvcALzCc9YZaLAWB7M1T2CMIh6POVQW3TJ77kqU7oNC/6F/NKDN4gBp+G9Ppp1w==
   dependencies:
-    "@akala/core" "^2.0.105"
+    "@akala/core" "^2.1.0"
+    "@akala/json-rpc-ws" "^8.0.2"
     debug "^4.1.1"
     split2 "^3.1.1"
-    uuid "^3.3.3"
+    uuid "^3.4.0"
 
-"@akala/core@^2.0.100", "@akala/core@^2.0.105":
+"@akala/core@^2.0.100", "@akala/core@^2.1.0":
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/@akala/core/-/core-2.1.0.tgz#a890feb4f2a55c952fb60292c287d039e2a59a45"
   integrity sha512-0r9+NA4wjYhRB4atyxKUvvAipcIw/vE8bZ+NYeQFoF5JizonyJWypUizNWBQfbgx8d+wTM3G7oTEqL7PfFbFCg==
@@ -31,15 +32,6 @@
     utils-merge "^1.0.0"
     ws "^7.2.1"
 
-"@akala/json-rpc-ws@^7.0.2":
-  version "7.0.2"
-  resolved "https://registry.yarnpkg.com/@akala/json-rpc-ws/-/json-rpc-ws-7.0.2.tgz#543138e11a2a40fda2deb221bbae32afed65405b"
-  integrity sha512-uGt5GH367eYz2H/8rMnDM3CREWwWBW30Im0H3ipLZoqBMqxQNTxxwzchew7db+a+uXcJ2ora8Rrg53S5AmB2+g==
-  dependencies:
-    debug "^3.1.0"
-    uuid "^3.3.2"
-    ws "^6.0.0"
-
 "@akala/json-rpc-ws@^8.0.2":
   version "8.0.2"
   resolved "https://registry.yarnpkg.com/@akala/json-rpc-ws/-/json-rpc-ws-8.0.2.tgz#91215844315e799cd11a690b9a1fe2eff9b8b286"
@@ -49,14 +41,14 @@
     uuid "^3.4.0"
     ws "^7.2.1"
 
-"@akala/server@^3.0.27":
-  version "3.0.30"
-  resolved "https://registry.yarnpkg.com/@akala/server/-/server-3.0.30.tgz#8e211484f47ddc7c0ac2de211ea53bf8041a8667"
-  integrity sha512-jzUyRxaVNQrJOHTG3hxkCGB+eN3ce9LSyamJhR7H78VLQ1Y9/YRKuuF2QK6z5oJ+4pw3ih9CD9nTUzPGl2wsgw==
+"@akala/server@^4.0.0":
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/@akala/server/-/server-4.0.0.tgz#a9e3497dac15905602a554d9eb5f2cc9035a02cd"
+  integrity sha512-Iw13C9V1pJyKS/6hb+alOHRazYrPwH3FQwVpiT+eN07CDwZoPtlcgFbbwfuo23XHz3+ZRelf7DAFGeBMx91c/w==
   dependencies:
-    "@akala/commands" "^0.4.6"
-    "@akala/core" "^2.0.105"
-    "@akala/json-rpc-ws" "^7.0.2"
+    "@akala/commands" "^0.4.30"
+    "@akala/core" "^2.1.0"
+    "@akala/json-rpc-ws" "^8.0.2"
     body-parser "^1.18.2"
     express "^4.16.2"
     on-finished "^2.3.0"
@@ -188,11 +180,6 @@ array-flatten@^3.0.0:
   resolved "https://registry.yarnpkg.com/array-flatten/-/array-flatten-3.0.0.tgz#6428ca2ee52c7b823192ec600fa3ed2f157cd541"
   integrity sha512-zPMVc3ZYlGLNk4mpK1NzP2wg0ml9t7fUgDsayR5Y5rSzxQilzR9FGu/EH2jQOcKSAeAfWeylyW8juy3OkWRvNA==
 
-async-limiter@~1.0.0:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/async-limiter/-/async-limiter-1.0.1.tgz#dd379e94f0db8310b08291f9d64c3209766617fd"
-  integrity sha512-csOlWGAcRFJaI6m+F2WKdnMKr4HhdhFVBk0H/QbJFMCr+uO2kwohwXQPxw/9OCxp05r5ghVBFSyioixx3gfkNQ==
-
 balanced-match@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-1.0.0.tgz#89b4d199ab2bee49de164ea02b89ce462d71b767"
@@ -342,7 +329,7 @@ debug@2.6.9:
   dependencies:
     ms "2.0.0"
 
-debug@3.2.6, debug@^3.1.0:
+debug@3.2.6:
   version "3.2.6"
   resolved "https://registry.yarnpkg.com/debug/-/debug-3.2.6.tgz#e83d17de16d8a7efb7717edbe5fb10135eee629b"
   integrity sha512-mel+jf7nrtEl5Pn1Qx46zARXKDpBbvzezse7p7LqINmdoIk8PYP5SySaxEmYv6TZ0JyEKA1hsCId6DIhgITtWQ==
@@ -1407,7 +1394,7 @@ utils-merge@1.0.1, utils-merge@^1.0.0:
   resolved "https://registry.yarnpkg.com/utils-merge/-/utils-merge-1.0.1.tgz#9f95710f50a267947b2ccc124741c1028427e713"
   integrity sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM=
 
-uuid@^3.3.2, uuid@^3.3.3, uuid@^3.4.0:
+uuid@^3.3.3, uuid@^3.4.0:
   version "3.4.0"
   resolved "https://registry.yarnpkg.com/uuid/-/uuid-3.4.0.tgz#b23e4358afa8a202fe7a100af1f5f883f02007ee"
   integrity sha512-HjSDRw6gZE5JMggctHBcjVak08+KEVhSIiDzFnT9S9aegmp85S/bReBVTb4QTFaRNptJ9kuYaNhnbNEOkbKb/A==
@@ -1467,13 +1454,6 @@ wrappy@1:
   resolved "https://registry.yarnpkg.com/wrappy/-/wrappy-1.0.2.tgz#b5243d8f3ec1aa35f1364605bc0d1036e30ab69f"
   integrity sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=
 
-ws@^6.0.0:
-  version "6.2.1"
-  resolved "https://registry.yarnpkg.com/ws/-/ws-6.2.1.tgz#442fdf0a47ed64f59b6a5d8ff130f4748ed524fb"
-  integrity sha512-GIyAXC2cB7LjvpgMt9EKS2ldqr0MTrORaleiOno6TweZ6r3TKtoFQWay/2PceJ3RuBasOHzXNn5Lrw1X0bEjqA==
-  dependencies:
-    async-limiter "~1.0.0"
-
 ws@^7.2.1:
   version "7.2.1"
   resolved "https://registry.yarnpkg.com/ws/-/ws-7.2.1.tgz#03ed52423cd744084b2cf42ed197c8b65a936b8e"