diff --git a/src/Client.ts b/src/Client.ts
index 82bd028..c1bc033 100644
--- a/src/Client.ts
+++ b/src/Client.ts
@@ -86,7 +86,7 @@ export abstract class Client {
     }
 
     getCapString(capVersion: string) {
-        let capArray = [];
+        let capArray: string[] = [];
         for (const [key, value] of this.allCaps.entries()) {
             if (capVersion === '301' || value.length === 0) {
                 capArray.push(key);
diff --git a/src/Message.ts b/src/Message.ts
index 9ae39d4..e755d8a 100644
--- a/src/Message.ts
+++ b/src/Message.ts
@@ -8,7 +8,7 @@ export class IRCMessage {
     toString() {
         let messageString = '';
         if (this.tags.size !== 0) {
-            let tagArray = [];
+            let tagArray: string[] = [];
             for (const [key, value] of this.tags) {
                 if (value === '') {
                     tagArray.push(key);