diff --git a/server/config.example.toml b/server/config.example.toml
index 50431d9..5c7f257 100644
--- a/server/config.example.toml
+++ b/server/config.example.toml
@@ -14,6 +14,7 @@ charlimit = 100
 agentsDir = "agents/"
 maxConnectionsPerIP = 2
 adminPasswordHash = "f52fbd32b2b3b86ff88ef6c490628285f482af15ddcb29541f94bcf526a3f6c7"
+bannedWords = []
 
 [chat.ratelimits]
 chat = {seconds = 10, limit = 8}
diff --git a/server/src/client.ts b/server/src/client.ts
index f2b87de..fb9372e 100644
--- a/server/src/client.ts
+++ b/server/src/client.ts
@@ -103,6 +103,10 @@ export class Client extends EventEmitter {
                     return;
                 }
                 let username = htmlentities.encode(joinMsg.data.username);
+                if (this.room.config.bannedWords.some(w => username.indexOf(w) !== -1)) {
+                    this.socket.close();
+                    return;
+                }
                 if (this.room.clients.some(u => u.username === username)) {
                     let i = 1;
                     let uo = username;
@@ -125,6 +129,9 @@ export class Client extends EventEmitter {
                     return;
                 }
                 if (talkMsg.data.msg.length > this.room.config.charlimit) return;
+                if (this.room.config.bannedWords.some(w => talkMsg.data.msg.indexOf(w) !== -1)) {
+                    return;
+                }
                 this.emit('talk', talkMsg.data.msg);
                 break;
             }
diff --git a/server/src/config.ts b/server/src/config.ts
index ac4d0ae..3c468a0 100644
--- a/server/src/config.ts
+++ b/server/src/config.ts
@@ -24,6 +24,7 @@ export interface ChatConfig {
     agentsDir: string;
     maxConnectionsPerIP: number;
     adminPasswordHash: string;
+    bannedWords: string[];
     ratelimits: {
         chat: RateLimitConfig;
     }