diff --git a/frontend/src/Throttler.ts b/frontend/src/Throttler.ts
index d168c7b..267bf4c 100644
--- a/frontend/src/Throttler.ts
+++ b/frontend/src/Throttler.ts
@@ -1,7 +1,7 @@
 export class Throttler {
     private hasBeenCalledWithinTime = false;
     private lastCallFunc: (() => Promise<any>) | null = null;
-    private timeout: int | null = null;
+    private timeout: number | null = null;
 
     public constructor(private minimumTimeBetweenCall: number) {}
 
diff --git a/frontend/src/main.ts b/frontend/src/main.ts
index a3c4b5a..e0ec015 100644
--- a/frontend/src/main.ts
+++ b/frontend/src/main.ts
@@ -38,7 +38,7 @@ async function fetchZipCode({
         .catch(() => null as never);
 }
 
-let currentBoundary;
+let currentBoundary: Array<number> | null = null;
 async function fetchAndDisplayZipCode(coords: Coordinate) {
     if (currentBoundary &&
         coords.longitude > currentBoundary[0] &&
@@ -52,7 +52,7 @@ async function fetchAndDisplayZipCode(coords: Coordinate) {
     currentBoundary = response.bbox;
 
     displayZipCode(
-        document.getElementById("zip-code")!,
+        document.querySelector<HTMLParagraphElement>("#zip-code")!,
         response.nr,
         response.navn,
         response.visueltcenter ? { longitude: response.visueltcenter[0], latitude: response.visueltcenter[1] } : null,