diff --git a/src/bot/filter.ts b/src/bot/filter.ts
index f7dcf6f..5b78461 100644
--- a/src/bot/filter.ts
+++ b/src/bot/filter.ts
@@ -41,7 +41,13 @@ export const literal = (filter: Filter, input: string) => {
 };
 
 export const regex = (filter: Filter, input: string) => {
-    throw new Error("'regex' filter not implemented");
+    try {
+        const flags = filter.is_insensitive ? "i" : "";
+        return new RegExp(filter.value, flags).test(input);
+    } catch (error) {
+        console.error(`Invalid regex pattern: ${filter.value}`, error);
+        return false;
+    }
 };
 
 export const fuzzy = (filter: Filter, input: string) => {