diff --git a/scoreboard/package.json b/scoreboard/package.json
index 3b88f39..cc2a55e 100644
--- a/scoreboard/package.json
+++ b/scoreboard/package.json
@@ -3,14 +3,18 @@
   "version": "0.1.0",
   "private": true,
   "dependencies": {
-    "d3": "^7.6.1",
+    "d3": "^7.8.5",
     "detect-browser": "^5.2.1",
     "event-emitter-es6": "^1.1.5",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
-    "react-scripts": "^4.0.3",
+    "react-scripts": "^5.0.1",
     "typescript": "^4.4.3",
-    "underscore": "^1.13.1"
+    "underscore": "^1.13.1",
+    "http-proxy-middleware": "^2.0.6"
+  },
+  "overrides": {
+    "nth-check": "2.0.1"
   },
   "scripts": {
     "start": "react-scripts start",
diff --git a/scoreboard/src/compactscoreboard.tsx b/scoreboard/src/compactscoreboard.tsx
index 15d158c..9a5b0e3 100644
--- a/scoreboard/src/compactscoreboard.tsx
+++ b/scoreboard/src/compactscoreboard.tsx
@@ -29,7 +29,7 @@ class CompactScoreboard extends Component<CompactScoreboardProps> {
                                         lineHeight: place_size + "px"
                                     }}>{i + 1}</div>
                                 </td>
-                                <td><img height={img_height} width={img_height} src={model.getLogo(team.team_id)}/></td>
+                                <td><img height={img_height} width={img_height} src={model.getLogo(team.team_id)} alt="Team logo"/></td>
                                 <td>
                                     <div className="compactTeamName" style={{"width": width - 230}}>{team.name}</div>
                                 </td>
diff --git a/scoreboard/src/model.ts b/scoreboard/src/model.ts
index ba84a27..c1763a6 100644
--- a/scoreboard/src/model.ts
+++ b/scoreboard/src/model.ts
@@ -184,13 +184,13 @@ export class GameModel {
 
     getSlaPeriodsForSomeServiceOfSomeTeam() {
         let team_ids = Object.keys(this.allRoundsSla);
-        if (team_ids.length == 0)
+        if (team_ids.length === 0)
             return [];
 
         let team_id = team_ids[0];
 
         let service_ids = Object.keys(this.allRoundsSla[team_id]);
-        if (service_ids.length == 0)
+        if (service_ids.length === 0)
             return [];
 
         let service_id = service_ids[0];
diff --git a/scoreboard/src/scoreboard.tsx b/scoreboard/src/scoreboard.tsx
index d933123..a67ae73 100644
--- a/scoreboard/src/scoreboard.tsx
+++ b/scoreboard/src/scoreboard.tsx
@@ -257,7 +257,7 @@ class Scoreboard extends Component<ScoreboardProps> {
                                     <div className="min">/round</div>
                                 </div>}
                                 {this.logo && <div className={"contest-logo"}>
-                                    <img src={this.logo}/>
+                                    <img src={this.logo} alt="Contest logo"/>
                                 </div>}
                                 {this.model.services.slice(0, this.model.servicesCount).map((service, i) => {
                                         if (!this.model!.active_services.includes(parseInt(service.id, 10)))
@@ -314,7 +314,7 @@ class Scoreboard extends Component<ScoreboardProps> {
                                                     serviceInfo.phase &&
                                                     <React.Fragment>
                                                         {
-                                                            serviceInfo.phase !== "DYING" && serviceInfo.phase !== "REMOVED" && serviceInfo.phase != "NOT_RELEASED" &&
+                                                            serviceInfo.phase !== "DYING" && serviceInfo.phase !== "REMOVED" && serviceInfo.phase !== "NOT_RELEASED" &&
                                                             <Timer seconds={phaseDuration!}
                                                                    direction={isGameActive ? "forward" : "none"}
                                                                    title={"Time from the beginning of the " + servicePhase + " phase"}
@@ -328,7 +328,7 @@ class Scoreboard extends Component<ScoreboardProps> {
                                                             />
                                                         }
                                                         {
-                                                            serviceInfo.phase != "NOT_RELEASED" &&
+                                                            serviceInfo.phase !== "NOT_RELEASED" &&
                                                             <div className={"phase phase_" + serviceInfo.phase} title={"Base flag price"}>
                                                                 { serviceInfo.flag_base_amount?.toFixed(2) }
                                                                 { serviceInfo.phase === "HEATING" && serviceInfo.flag_base_amount !== maxFlagPrice && <span className="mdi mdi-arrow-up-bold" title="HEATING phase"/> }
diff --git a/scoreboard/src/serviceblock.tsx b/scoreboard/src/serviceblock.tsx
index 654864c..15abf4d 100644
--- a/scoreboard/src/serviceblock.tsx
+++ b/scoreboard/src/serviceblock.tsx
@@ -45,8 +45,8 @@ class Serviceblock extends Component<ServiceblockProps> {
         const maxSla = Math.ceil((service.sla * round + 100 * (roundsCount - round)) / roundsCount);
         let serviceReleased = true;
         model.services.forEach((s) => {
-            if (s.id == service.id.toString()) {
-                serviceReleased = model.services[service.id - 1].phase != "NOT_RELEASED";
+            if (s.id === service.id.toString()) {
+                serviceReleased = model.services[service.id - 1].phase !== "NOT_RELEASED";
             }
         })
 
diff --git a/scoreboard/src/setupProxy.js b/scoreboard/src/setupProxy.js
index 78eda08..3e7aba7 100644
--- a/scoreboard/src/setupProxy.js
+++ b/scoreboard/src/setupProxy.js
@@ -1,23 +1,9 @@
-const proxy = require('http-proxy-middleware');
-
-/*
-  "proxy": {
-    "^/api/events": {
-      "target": "http://10.60.3.1",
-      "ws": true,
-      "changeOrigin": true
-    },
-    "/": {
-      "target": "http://10.60.3.1",
-      "changeOrigin": true
-    }
-  },
-*/
+const { createProxyMiddleware } = require('http-proxy-middleware');
 
 module.exports = function (app) {
-    app.use(proxy('/logo.png', {target: 'https://training.ctf.hitb.org/', ws: true, changeOrigin: true}));
-    app.use(proxy('/api/events', {target: 'https://training.ctf.hitb.org/', ws: true, changeOrigin: true}));
-    app.use(proxy('/api', {target: 'https://training.ctf.hitb.org/', changeOrigin: true}));
-    app.use(proxy('/history', {target: 'https://training.ctf.hitb.org/', changeOrigin: true}));
-    app.use(proxy('/data', {target: 'https://training.ctf.hitb.org/', changeOrigin: true}));
+    app.use(createProxyMiddleware('/logo.png', {target: 'https://training.ctf.hitb.org/', ws: true, changeOrigin: true}));
+    app.use(createProxyMiddleware('/api/events', {target: 'https://training.ctf.hitb.org/', ws: true, changeOrigin: true}));
+    app.use(createProxyMiddleware('/api', {target: 'https://training.ctf.hitb.org/', changeOrigin: true}));
+    app.use(createProxyMiddleware('/history', {target: 'https://training.ctf.hitb.org/', changeOrigin: true}));
+    app.use(createProxyMiddleware('/data',{target: 'https://training.ctf.hitb.org/', changeOrigin: true}));
 };
diff --git a/scoreboard/src/team.tsx b/scoreboard/src/team.tsx
index 6aac731..f92fdaa 100644
--- a/scoreboard/src/team.tsx
+++ b/scoreboard/src/team.tsx
@@ -85,7 +85,7 @@ class Team extends Component<TeamProps, TeamComponentState> {
                         <div className="team_summary">
                             <div className="place"><span>{team.n}</span><span className="suffix">&thinsp;{suffix}</span>
                             </div>
-                            <div className="team_logo team_border"><img className="img" src={logo}/></div>
+                            <div className="team_logo team_border"><img className="img" src={logo} alt="Team logo"/></div>
                             <div className="team_info team_border">
                                 <div className="team_name" title={team.name}>{team.name}</div>
                                 <div className="tags">