diff --git a/src/util.ts b/src/util.ts
index 9e823c786486d235b61935d072dbe25eb3017b0b..142f6d372cb2b3a022a9d8a8568e701918228a37 100644
--- a/src/util.ts
+++ b/src/util.ts
@@ -1,11 +1,12 @@
 import * as vscode from "vscode";
 
-export function toSortedKeys<T>(map: Map<string, T>): string[] {
-	// Todo can I ignore the map value type in a better way
+type platform = "darwin-amd64" | "windows-amd64" | "linux-amd64";
+
+export function toSortedKeys(map: Map<string, unknown>): string[] {
 	return Array.from(map.keys()).sort();
 }
 
-export function executableFileEnding() {
+export function executableFileEnding(): "" | ".exe" | never {
 	if (determinePlatform() === "windows-amd64") {
 		return ".exe";
 	} else {
@@ -13,7 +14,7 @@ export function executableFileEnding() {
 	}
 }
 
-export function determinePlatform() {
+export function determinePlatform(): platform {
 	// also look at process.arch
 	switch (process.platform) {
 		case "darwin":