diff --git a/back-end/package-lock.json b/back-end/package-lock.json
index 1672323..2d7f073 100644
--- a/back-end/package-lock.json
+++ b/back-end/package-lock.json
@@ -30,14 +30,14 @@
       "integrity": "sha512-y7mImlc/rNkvCRmg8gC3/lj87S7pTUIJ6QGjwHR9WQJcFs+ZMTOaoPrkdFA/YdbuqVEmEbb5RdhVxMkAcgOnpg=="
     },
     "@types/cors": {
-      "version": "2.8.9",
-      "resolved": "https://registry.npmjs.org/@types/cors/-/cors-2.8.9.tgz",
-      "integrity": "sha512-zurD1ibz21BRlAOIKP8yhrxlqKx6L9VCwkB5kMiP6nZAhoF5MvC7qS1qPA7nRcr1GJolfkQC7/EAL4hdYejLtg=="
+      "version": "2.8.10",
+      "resolved": "https://registry.npmjs.org/@types/cors/-/cors-2.8.10.tgz",
+      "integrity": "sha512-C7srjHiVG3Ey1nR6d511dtDkCEjxuN9W1HWAEjGq8kpcwmNM6JJkpC0xvabM7BXTG2wDq8Eu33iH9aQKa7IvLQ=="
     },
     "@types/node": {
-      "version": "14.14.14",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-14.14.14.tgz",
-      "integrity": "sha512-UHnOPWVWV1z+VV8k6L1HhG7UbGBgIdghqF3l9Ny9ApPghbjICXkUJSd/b9gOgQfjM1r+37cipdw/HJ3F6ICEnQ=="
+      "version": "14.14.33",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-14.14.33.tgz",
+      "integrity": "sha512-oJqcTrgPUF29oUP8AsUqbXGJNuPutsetaa9kTQAQce5Lx5dTYWV02ScBiT/k1BX/Z7pKeqedmvp39Wu4zR7N7g=="
     },
     "abbrev": {
       "version": "1.1.1",
@@ -609,27 +609,17 @@
       }
     },
     "engine.io": {
-      "version": "4.0.5",
-      "resolved": "https://registry.npmjs.org/engine.io/-/engine.io-4.0.5.tgz",
-      "integrity": "sha512-Ri+whTNr2PKklxQkfbGjwEo+kCBUM4Qxk4wtLqLrhH+b1up2NFL9g9pjYWiCV/oazwB0rArnvF/ZmZN2ab5Hpg==",
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/engine.io/-/engine.io-5.0.0.tgz",
+      "integrity": "sha512-BATIdDV3H1SrE9/u2BAotvsmjJg0t1P4+vGedImSs1lkFAtQdvk4Ev1y4LDiPF7BPWgXWEG+NDY+nLvW3UrMWw==",
       "requires": {
         "accepts": "~1.3.4",
         "base64id": "2.0.0",
         "cookie": "~0.4.1",
         "cors": "~2.8.5",
-        "debug": "~4.1.0",
+        "debug": "~4.3.1",
         "engine.io-parser": "~4.0.0",
-        "ws": "^7.1.2"
-      },
-      "dependencies": {
-        "debug": {
-          "version": "4.1.1",
-          "resolved": "https://registry.npmjs.org/debug/-/debug-4.1.1.tgz",
-          "integrity": "sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==",
-          "requires": {
-            "ms": "^2.1.1"
-          }
-        }
+        "ws": "~7.4.2"
       }
     },
     "engine.io-parser": {
@@ -1914,54 +1904,34 @@
       "integrity": "sha1-tf3AjxKH6hF4Yo5BXiUTK3NkbG0="
     },
     "socket.io": {
-      "version": "3.0.4",
-      "resolved": "https://registry.npmjs.org/socket.io/-/socket.io-3.0.4.tgz",
-      "integrity": "sha512-Vj1jUoO75WGc9txWd311ZJJqS9Dr8QtNJJ7gk2r7dcM/yGe9sit7qOijQl3GAwhpBOz/W8CwkD7R6yob07nLbA==",
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/socket.io/-/socket.io-4.0.0.tgz",
+      "integrity": "sha512-/c1riZMV/4yz7KEpaMhDQbwhJDIoO55whXaRKgyEBQrLU9zUHXo9rzeTMvTOqwL9mbKfHKdrXcMoCeQ/1YtMsg==",
       "requires": {
         "@types/cookie": "^0.4.0",
         "@types/cors": "^2.8.8",
-        "@types/node": "^14.14.7",
+        "@types/node": ">=10.0.0",
         "accepts": "~1.3.4",
         "base64id": "~2.0.0",
-        "debug": "~4.1.0",
-        "engine.io": "~4.0.0",
-        "socket.io-adapter": "~2.0.3",
-        "socket.io-parser": "~4.0.1"
-      },
-      "dependencies": {
-        "debug": {
-          "version": "4.1.1",
-          "resolved": "https://registry.npmjs.org/debug/-/debug-4.1.1.tgz",
-          "integrity": "sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==",
-          "requires": {
-            "ms": "^2.1.1"
-          }
-        }
+        "debug": "~4.3.1",
+        "engine.io": "~5.0.0",
+        "socket.io-adapter": "~2.2.0",
+        "socket.io-parser": "~4.0.3"
       }
     },
     "socket.io-adapter": {
-      "version": "2.0.3",
-      "resolved": "https://registry.npmjs.org/socket.io-adapter/-/socket.io-adapter-2.0.3.tgz",
-      "integrity": "sha512-2wo4EXgxOGSFueqvHAdnmi5JLZzWqMArjuP4nqC26AtLh5PoCPsaRbRdah2xhcwTAMooZfjYiNVNkkmmSMaxOQ=="
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/socket.io-adapter/-/socket.io-adapter-2.2.0.tgz",
+      "integrity": "sha512-rG49L+FwaVEwuAdeBRq49M97YI3ElVabJPzvHT9S6a2CWhDKnjSFasvwAwSYPRhQzfn4NtDIbCaGYgOCOU/rlg=="
     },
     "socket.io-parser": {
-      "version": "4.0.2",
-      "resolved": "https://registry.npmjs.org/socket.io-parser/-/socket.io-parser-4.0.2.tgz",
-      "integrity": "sha512-Bs3IYHDivwf+bAAuW/8xwJgIiBNtlvnjYRc4PbXgniLmcP1BrakBoq/QhO24rgtgW7VZ7uAaswRGxutUnlAK7g==",
+      "version": "4.0.4",
+      "resolved": "https://registry.npmjs.org/socket.io-parser/-/socket.io-parser-4.0.4.tgz",
+      "integrity": "sha512-t+b0SS+IxG7Rxzda2EVvyBZbvFPBCjJoyHuE0P//7OAsN23GItzDRdWa6ALxZI/8R5ygK7jAR6t028/z+7295g==",
       "requires": {
         "@types/component-emitter": "^1.2.10",
         "component-emitter": "~1.3.0",
-        "debug": "~4.1.0"
-      },
-      "dependencies": {
-        "debug": {
-          "version": "4.1.1",
-          "resolved": "https://registry.npmjs.org/debug/-/debug-4.1.1.tgz",
-          "integrity": "sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==",
-          "requires": {
-            "ms": "^2.1.1"
-          }
-        }
+        "debug": "~4.3.1"
       }
     },
     "spex": {
@@ -2286,9 +2256,9 @@
       }
     },
     "ws": {
-      "version": "7.4.1",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-7.4.1.tgz",
-      "integrity": "sha512-pTsP8UAfhy3sk1lSk/O/s4tjD0CRwvMnzvwr4OKGX7ZvqZtUyx4KIJB5JWbkykPoc55tixMGgTNoh3k4FkNGFQ=="
+      "version": "7.4.4",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-7.4.4.tgz",
+      "integrity": "sha512-Qm8k8ojNQIMx7S+Zp8u/uHOx7Qazv3Yv4q68MiWWWOJhiwG5W3x7iqmRtJo8xxrciZUY4vRxUTJCKuRnF28ZZw=="
     },
     "xdg-basedir": {
       "version": "4.0.0",
diff --git a/back-end/package.json b/back-end/package.json
index 0b16479..9bd9ec8 100644
--- a/back-end/package.json
+++ b/back-end/package.json
@@ -21,7 +21,7 @@
     "passport": "^0.4.1",
     "passport-local": "^1.0.0",
     "pg-promise": "^10.8.6",
-    "socket.io": "^3.0.4",
+    "socket.io": "^4.0.0",
     "uuid": "^8.3.2"
   },
   "devDependencies": {