diff --git a/src/@types/global.d.ts b/src/@types/global.d.ts
index 7aec4de9..00373a68 100644
--- a/src/@types/global.d.ts
+++ b/src/@types/global.d.ts
@@ -18,4 +18,5 @@ interface Window {
     Olm: {
         init: () => Promise<void>;
     };
+    mxSendRageshake: (text: string, withLogs?: boolean) => void;
 }
diff --git a/src/vector/getconfig.js b/src/vector/getconfig.ts
similarity index 94%
rename from src/vector/getconfig.js
rename to src/vector/getconfig.ts
index c0f81f6c..36c36cce 100644
--- a/src/vector/getconfig.js
+++ b/src/vector/getconfig.ts
@@ -18,8 +18,7 @@ import request from 'browser-request';
 
 // Load the config file. First try to load up a domain-specific config of the
 // form "config.$domain.json" and if that fails, fall back to config.json.
-export async function getVectorConfig(relativeLocation) {
-    if (relativeLocation === undefined) relativeLocation = '';
+export async function getVectorConfig(relativeLocation: string='') {
     if (relativeLocation !== '' && !relativeLocation.endsWith('/')) relativeLocation += '/';
 
     const specificConfigPromise = getConfig(`${relativeLocation}config.${document.domain}.json`);
@@ -37,7 +36,7 @@ export async function getVectorConfig(relativeLocation) {
     }
 }
 
-function getConfig(configJsonFilename) {
+function getConfig(configJsonFilename: string): Promise<{}> {
     return new Promise(function(resolve, reject) {
         request(
             { method: "GET", url: configJsonFilename, qs: { cachebuster: Date.now() } },
diff --git a/src/vector/init.ts b/src/vector/init.ts
index 96fd57b0..16a6a885 100644
--- a/src/vector/init.ts
+++ b/src/vector/init.ts
@@ -26,7 +26,7 @@ import * as languageHandler from 'matrix-react-sdk/src/languageHandler';
 import SettingsStore from "matrix-react-sdk/src/settings/SettingsStore";
 
 
-export function loadOlm() {
+export function loadOlm(): Promise<void> {
     /* Load Olm. We try the WebAssembly version first, and then the legacy,
      * asm.js version if that fails. For this reason we need to wait for this
      * to finish before continuing to load the rest of the app. In future
diff --git a/src/vector/rageshakesetup.js b/src/vector/rageshakesetup.ts
similarity index 97%
rename from src/vector/rageshakesetup.js
rename to src/vector/rageshakesetup.ts
index e9ce1c3b..6445f4e9 100644
--- a/src/vector/rageshakesetup.js
+++ b/src/vector/rageshakesetup.ts
@@ -50,7 +50,7 @@ function initRageshake() {
 
 initRageshake();
 
-global.mxSendRageshake = function(text, withLogs) {
+window.mxSendRageshake = function(text: string, withLogs?: boolean) {
     if (withLogs === undefined) withLogs = true;
     if (!text || !text.trim()) {
         console.error("Cannot send a rageshake without a message - please tell us what went wrong");
diff --git a/src/vector/url_utils.ts b/src/vector/url_utils.ts
index 935167aa..6a08ec75 100644
--- a/src/vector/url_utils.ts
+++ b/src/vector/url_utils.ts
@@ -20,7 +20,7 @@ import * as qs from 'querystring';
 // so we're re-using query string like format
 //
 // returns {location, params}
-export function parseQsFromFragment(location) {
+export function parseQsFromFragment(location: Location) {
     // if we have a fragment, it will start with '#', which we need to drop.
     // (if we don't, this will return '').
     const fragment = location.hash.substring(1);
@@ -41,6 +41,6 @@ export function parseQsFromFragment(location) {
     return result;
 }
 
-export function parseQs(location) {
+export function parseQs(location: Location) {
     return qs.parse(location.search.substring(1));
 }