diff --git a/spec/unit/matrix-client.spec.ts b/spec/unit/matrix-client.spec.ts
index b9b0081135e..841b7c67be0 100644
--- a/spec/unit/matrix-client.spec.ts
+++ b/spec/unit/matrix-client.spec.ts
@@ -1026,4 +1026,57 @@ describe("MatrixClient", function() {
             expect(requestContent).toEqual(content);
         });
     });
+
+    describe("setPassword", () => {
+        const auth = { session: 'abcdef', type: 'foo' };
+        const newPassword = 'newpassword';
+        const callback = () => {};
+
+        const passwordTest = (expectedRequestContent: any, expectedCallback?: Function) => {
+            const [callback, method, path, queryParams, requestContent] = client.http.authedRequest.mock.calls[0];
+            if (expectedCallback) {
+                expect(callback).toBe(expectedCallback);
+            } else {
+                expect(callback).toBeFalsy();
+            }
+            expect(method).toBe('POST');
+            expect(path).toEqual('/account/password');
+            expect(queryParams).toBeFalsy();
+            expect(requestContent).toEqual(expectedRequestContent);
+        };
+
+        beforeEach(() => {
+            client.http.authedRequest.mockClear().mockResolvedValue({});
+        });
+
+        it("no logout_devices specified", async () => {
+            await client.setPassword(auth, newPassword);
+            passwordTest({ auth, new_password: newPassword });
+        });
+
+        it("no logout_devices specified + callback", async () => {
+            await client.setPassword(auth, newPassword, callback);
+            passwordTest({ auth, new_password: newPassword }, callback);
+        });
+
+        it("overload logoutDevices=true", async () => {
+            await client.setPassword(auth, newPassword, true);
+            passwordTest({ auth, new_password: newPassword, logout_devices: true });
+        });
+
+        it("overload logoutDevices=true + callback", async () => {
+            await client.setPassword(auth, newPassword, true, callback);
+            passwordTest({ auth, new_password: newPassword, logout_devices: true }, callback);
+        });
+
+        it("overload logoutDevices=false", async () => {
+            await client.setPassword(auth, newPassword, false);
+            passwordTest({ auth, new_password: newPassword, logout_devices: false });
+        });
+
+        it("overload logoutDevices=false + callback", async () => {
+            await client.setPassword(auth, newPassword, false, callback);
+            passwordTest({ auth, new_password: newPassword, logout_devices: false }, callback);
+        });
+    });
 });
diff --git a/src/client.ts b/src/client.ts
index 1ae008dba2a..918970f697f 100644
--- a/src/client.ts
+++ b/src/client.ts
@@ -7815,18 +7815,45 @@ export class MatrixClient extends TypedEventEmitter<EmittedEvents, ClientEventHa
      * Make a request to change your password.
      * @param {Object} authDict
      * @param {string} newPassword The new desired password.
+     * @param {boolean} logoutDevices Should all sessions be logged out after the password change. Defaults to true.
      * @param {module:client.callback} callback Optional.
      * @return {Promise} Resolves: TODO
      * @return {module:http-api.MatrixError} Rejects: with an error response.
      */
-    public setPassword(authDict: any, newPassword: string, callback?: Callback): Promise<any> { // TODO: Types
+    public setPassword(
+        authDict: any,
+        newPassword: string,
+        callback?: Callback,
+    ): Promise<{}>;
+    public setPassword(
+        authDict: any,
+        newPassword: string,
+        logoutDevices: boolean,
+        callback?: Callback,
+    ): Promise<{}>;
+    public setPassword(
+        authDict: any,
+        newPassword: string,
+        logoutDevices?: Callback | boolean,
+        callback?: Callback,
+    ): Promise<{}> {
+        if (typeof logoutDevices === 'function') {
+            callback = logoutDevices;
+        }
+        if (typeof logoutDevices !== 'boolean') {
+            // Use backwards compatible behaviour of not specifying logout_devices
+            // This way it is left up to the server:
+            logoutDevices = undefined;
+        }
+
         const path = "/account/password";
         const data = {
             'auth': authDict,
             'new_password': newPassword,
+            'logout_devices': logoutDevices,
         };
 
-        return this.http.authedRequest(
+        return this.http.authedRequest<{}>(
             callback, Method.Post, path, null, data,
         );
     }