diff --git a/frontend/local-client-cli/src/cli.ts b/frontend/local-client-cli/src/cli.ts
index 2655bd38..2a4cef98 100644
--- a/frontend/local-client-cli/src/cli.ts
+++ b/frontend/local-client-cli/src/cli.ts
@@ -143,7 +143,9 @@ async function main(): Promise<void> {
 				writeHealthStatus(healthFile, status);
 			});
 		}, 30 * 1000); // every 30 seconds
-		const clearHealthInterval = () => clearInterval(healthInterval);
+		const clearHealthInterval = (): void => {
+			clearInterval(healthInterval);
+		};
 		process.on("SIGINT", clearHealthInterval);
 		process.on("SIGTERM", clearHealthInterval);
 		process.on("exit", clearHealthInterval);
diff --git a/frontend/local-client-cli/src/healthcheck.ts b/frontend/local-client-cli/src/healthcheck.ts
index 75c1906f..256cd2d8 100644
--- a/frontend/local-client-cli/src/healthcheck.ts
+++ b/frontend/local-client-cli/src/healthcheck.ts
@@ -13,11 +13,13 @@ function isHealthStatus(value: unknown): value is NetworkConnectionStatus {
 		return false;
 	}
 
-	const obj = value as Record<string, unknown>;
 	return (
-		typeof obj.isSuccessful === "boolean" &&
-		typeof obj.isWebSocketConnected === "boolean" &&
-		typeof obj.serverMessage === "string"
+		"isSuccessful" in value &&
+		typeof value.isSuccessful === "boolean" &&
+		"isWebSocketConnected" in value &&
+		typeof value.isWebSocketConnected === "boolean" &&
+		"serverMessage" in value &&
+		typeof value.serverMessage === "string"
 	);
 }