diff --git a/packages/collection/src/index.ts b/packages/collection/src/index.ts
index a2bb42852..5ab8f277f 100644
--- a/packages/collection/src/index.ts
+++ b/packages/collection/src/index.ts
@@ -185,7 +185,7 @@ export class Collection<K, V> extends Map<K, V> {
 		if (!arr.length || !amount) return [];
 		return Array.from(
 			{ length: Math.min(amount, arr.length) },
-			(): V => arr.splice(Math.floor(Math.random() * arr.length), 1)[0],
+			(): V => arr.splice(Math.floor(Math.random() * arr.length), 1)[0]!,
 		);
 	}
 
@@ -204,7 +204,7 @@ export class Collection<K, V> extends Map<K, V> {
 		if (!arr.length || !amount) return [];
 		return Array.from(
 			{ length: Math.min(amount, arr.length) },
-			(): K => arr.splice(Math.floor(Math.random() * arr.length), 1)[0],
+			(): K => arr.splice(Math.floor(Math.random() * arr.length), 1)[0]!,
 		);
 	}
 
diff --git a/packages/rest/src/lib/RequestManager.ts b/packages/rest/src/lib/RequestManager.ts
index 7d0bd1da6..2ffd0dfe9 100644
--- a/packages/rest/src/lib/RequestManager.ts
+++ b/packages/rest/src/lib/RequestManager.ts
@@ -481,7 +481,7 @@ export class RequestManager extends EventEmitter {
 		// Hard-Code Old Message Deletion Exception (2 week+ old messages are a different bucket)
 		// https://github.com/discord/discord-api-docs/issues/1295
 		if (method === RequestMethod.Delete && baseRoute === '/channels/:id/messages/:id') {
-			const id = /\d{16,19}$/.exec(endpoint)![0];
+			const id = /\d{16,19}$/.exec(endpoint)![0]!;
 			const timestamp = DiscordSnowflake.timestampFrom(id);
 			if (Date.now() - timestamp > 1000 * 60 * 60 * 24 * 14) {
 				exceptions += '/Delete Old Message';
diff --git a/packages/voice/src/audio/AudioResource.ts b/packages/voice/src/audio/AudioResource.ts
index 1db0c1abb..5866d3d98 100644
--- a/packages/voice/src/audio/AudioResource.ts
+++ b/packages/voice/src/audio/AudioResource.ts
@@ -97,7 +97,7 @@ export class AudioResource<T = unknown> {
 
 	public constructor(edges: readonly Edge[], streams: readonly Readable[], metadata: T, silencePaddingFrames: number) {
 		this.edges = edges;
-		this.playStream = streams.length > 1 ? (pipeline(streams, noop) as any as Readable) : streams[0];
+		this.playStream = streams.length > 1 ? (pipeline(streams, noop) as any as Readable) : streams[0]!;
 		this.metadata = metadata;
 		this.silencePaddingFrames = silencePaddingFrames;
 
diff --git a/packages/voice/src/networking/VoiceUDPSocket.ts b/packages/voice/src/networking/VoiceUDPSocket.ts
index 992508c26..0b60922cf 100644
--- a/packages/voice/src/networking/VoiceUDPSocket.ts
+++ b/packages/voice/src/networking/VoiceUDPSocket.ts
@@ -133,7 +133,7 @@ export class VoiceUDPSocket extends TypedEmitter<VoiceUDPSocketEvents> {
 			const counter = buffer.readUInt32LE(0);
 			const index = this.keepAlives.findIndex(({ value }) => value === counter);
 			if (index === -1) return;
-			this.ping = Date.now() - this.keepAlives[index].timestamp;
+			this.ping = Date.now() - this.keepAlives[index]!.timestamp;
 			// Delete all keep alives up to and including the received one
 			this.keepAlives.splice(0, index);
 		}
diff --git a/packages/voice/src/receive/VoiceReceiver.ts b/packages/voice/src/receive/VoiceReceiver.ts
index 0d06ea68d..1d1b5b9fe 100644
--- a/packages/voice/src/receive/VoiceReceiver.ts
+++ b/packages/voice/src/receive/VoiceReceiver.ts
@@ -134,7 +134,7 @@ export class VoiceReceiver {
 			const headerExtensionLength = packet.readUInt16BE(2);
 			let offset = 4;
 			for (let i = 0; i < headerExtensionLength; i++) {
-				const byte = packet[offset];
+				const byte = packet[offset]!;
 				offset++;
 				if (byte === 0) continue;
 				offset += 1 + (byte >> 4);
diff --git a/tsconfig.json b/tsconfig.json
index d1d5a8993..28c62d99b 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -13,6 +13,7 @@
 		"noUnusedParameters": true,
 		"strict": true,
 		"useUnknownInCatchVariables": true,
+		"noUncheckedIndexedAccess": true,
 
 		// Modules
 		"module": "CommonJS",