diff --git a/package.json b/package.json
index d53536c..42a7a26 100755
--- a/package.json
+++ b/package.json
@@ -24,20 +24,20 @@
   },
   "homepage": "https://github.com/excalidraw/excalidraw-room#readme",
   "dependencies": {
-    "debug": "^4.1.1",
+    "debug": "4.1.1",
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.0",
     "eslint-plugin-prettier": "3.1.2",
-    "express": "^4.17.1",
+    "express": "4.17.1",
     "prettier": "1.19.1",
-    "socket.io": "^2.3.0"
+    "socket.io": "2.3.0"
   },
   "devDependencies": {
-    "@types/socket.io": "^2.1.4",
-    "@types/debug": "^4.1.5",
-    "@types/express": "^4.17.3",
-    "@types/node": "^13.9.0",
-    "typescript": "^3.8.3"
+    "@types/socket.io": "2.1.4",
+    "@types/debug": "4.1.5",
+    "@types/express": "4.17.3",
+    "@types/node": "13.9.0",
+    "typescript": "3.8.3"
   },
   "eslintConfig": {
     "extends": [
diff --git a/yarn.lock b/yarn.lock
index cc9ab46..2242b19 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -38,7 +38,7 @@
   dependencies:
     "@types/node" "*"
 
-"@types/debug@^4.1.5":
+"@types/debug@4.1.5":
   version "4.1.5"
   resolved "https://registry.yarnpkg.com/@types/debug/-/debug-4.1.5.tgz#b14efa8852b7768d898906613c23f688713e02cd"
   integrity sha512-Q1y515GcOdTHgagaVFhHnIFQ38ygs/kmxdNpvpou+raI9UO3YZcHDngBSYKQklcKlvA7iuQlmIKbzvmxcOE9CQ==
@@ -51,7 +51,7 @@
     "@types/node" "*"
     "@types/range-parser" "*"
 
-"@types/express@^4.17.3":
+"@types/express@4.17.3":
   version "4.17.3"
   resolved "https://registry.yarnpkg.com/@types/express/-/express-4.17.3.tgz#38e4458ce2067873b09a73908df488870c303bd9"
   integrity sha512-I8cGRJj3pyOLs/HndoP+25vOqhqWkAZsWMEmq1qXy/b/M3ppufecUwaK2/TVDVxcV61/iSdhykUjQQ2DLSrTdg==
@@ -65,7 +65,7 @@
   resolved "https://registry.yarnpkg.com/@types/mime/-/mime-2.0.1.tgz#dc488842312a7f075149312905b5e3c0b054c79d"
   integrity sha512-FwI9gX75FgVBJ7ywgnq/P7tw+/o1GUbtP0KzbtusLigAOgIgNISRK0ZPl4qertvXSIE8YbsVJueQ90cDt9YYyw==
 
-"@types/node@*", "@types/node@^13.9.0":
+"@types/node@*", "@types/node@13.9.0":
   version "13.9.0"
   resolved "https://registry.yarnpkg.com/@types/node/-/node-13.9.0.tgz#5b6ee7a77faacddd7de719017d0bc12f52f81589"
   integrity sha512-0ARSQootUG1RljH2HncpsY2TJBfGQIKOOi7kxzUY6z54ePu/ZD+wJA8zI2Q6v8rol2qpG/rvqsReco8zNMPvhQ==
@@ -83,7 +83,7 @@
     "@types/express-serve-static-core" "*"
     "@types/mime" "*"
 
-"@types/socket.io@^2.1.4":
+"@types/socket.io@2.1.4":
   version "2.1.4"
   resolved "https://registry.yarnpkg.com/@types/socket.io/-/socket.io-2.1.4.tgz#674e7bc193c5ccdadd4433f79f3660d31759e9ac"
   integrity sha512-cI98INy7tYnweTsUlp8ocveVdAxENUThO0JsLSCs51cjOP2yV5Mqo5QszMDPckyRRA+PO6+wBgKvGvHUCc23TQ==
@@ -376,7 +376,7 @@ debug@2.6.9:
   dependencies:
     ms "2.0.0"
 
-debug@^4.0.1, debug@^4.1.1, debug@~4.1.0:
+debug@4.1.1, debug@^4.0.1, debug@~4.1.0:
   version "4.1.1"
   resolved "https://registry.yarnpkg.com/debug/-/debug-4.1.1.tgz#3b72260255109c6b589cee050f1d516139664791"
   integrity sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==
@@ -602,7 +602,7 @@ etag@~1.8.1:
   resolved "https://registry.yarnpkg.com/etag/-/etag-1.8.1.tgz#41ae2eeb65efa62268aebfea83ac7d79299b0887"
   integrity sha1-Qa4u62XvpiJorr/qg6x9eSmbCIc=
 
-express@^4.17.1:
+express@4.17.1:
   version "4.17.1"
   resolved "https://registry.yarnpkg.com/express/-/express-4.17.1.tgz#4491fc38605cf51f8629d39c2b5d026f98a4c134"
   integrity sha512-mHJ9O79RqluphRrcw2X/GTh3k9tVv8YcoyY4Kkh4WDMUYKRZUq0h1o0w2rrrxBqM7VoeUVqgb27xlEMXTnYt4g==
@@ -1340,7 +1340,7 @@ socket.io-parser@~3.4.0:
     debug "~4.1.0"
     isarray "2.0.1"
 
-socket.io@^2.3.0:
+socket.io@2.3.0:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/socket.io/-/socket.io-2.3.0.tgz#cd762ed6a4faeca59bc1f3e243c0969311eb73fb"
   integrity sha512-2A892lrj0GcgR/9Qk81EaY2gYhCBxurV0PfmmESO6p27QPrUK1J3zdns+5QPqvUYK2q657nSj0guoIil9+7eFg==
@@ -1480,7 +1480,7 @@ type-is@~1.6.17, type-is@~1.6.18:
     media-typer "0.3.0"
     mime-types "~2.1.24"
 
-typescript@^3.8.3:
+typescript@3.8.3:
   version "3.8.3"
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.8.3.tgz#409eb8544ea0335711205869ec458ab109ee1061"
   integrity sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==