diff --git a/src/store/mutation-types.js b/src/store/mutation-types.js
deleted file mode 100644
index 5d5af67..0000000
--- a/src/store/mutation-types.js
+++ /dev/null
@@ -1,3 +0,0 @@
-export const LOGIN = 'LOGIN';
-export const LOGOUT = 'LOGOUT';
-export const SET_CURRENT_PASSWORD_PROFILE = 'SET_CURRENT_PASSWORD_PROFILE';
\ No newline at end of file
diff --git a/src/store/mutations.js b/src/store/mutations.js
index 21b4a8c..638f0f7 100644
--- a/src/store/mutations.js
+++ b/src/store/mutations.js
@@ -1,13 +1,20 @@
-import * as types from './mutation-types';
+import {set} from 'vue';
+
+function setState(state, id, object) {
+    set(state, id, Object.assign({}, object));
+}
 
 export const mutations = {
-    [types.LOGIN](state){
+    LOGIN(state){
         state.authenticated = true;
     },
-    [types.LOGOUT](state){
+    LOGOUT(state){
         state.authenticated = false;
     },
-    [types.SET_CURRENT_PASSWORD_PROFILE](state, passwordProfile){
-        state.currentPasswordProfile = passwordProfile;
+    SET_CURRENT_PASSWORD_PROFILE(state, passwordProfile){
+        setState(state, 'currentPasswordProfile', passwordProfile);
+    },
+    SET_DEFAULT_OPTIONS(state, options){
+        setState(state, 'defaultOptions', options);
     }
 };
\ No newline at end of file
diff --git a/test/store.js b/test/store.js
index f71a2b3..7110813 100644
--- a/test/store.js
+++ b/test/store.js
@@ -22,6 +22,36 @@ test('SET_CURRENT_PASSWORD_PROFILE', t => {
         uppercase: true,
         version: 2
     });
-    t.true(state.currentPasswordProfile.version == 2);
+    t.is(state.currentPasswordProfile.version, 2);
     t.true(state.currentPasswordProfile.uppercase);
+});
+
+test('SET_CURRENT_PASSWORD_PROFILE immutable', t => {
+    const {SET_CURRENT_PASSWORD_PROFILE} = mutations;
+    const state = {};
+    const profile = {version: 2};
+    SET_CURRENT_PASSWORD_PROFILE(state, profile);
+    profile.version = 1;
+    t.is(state.currentPasswordProfile.version, 2);
+});
+
+test('SET_DEFAULT_OPTIONS', t => {
+    const {SET_DEFAULT_OPTIONS} = mutations;
+    const state = {
+        defaultOptions: {
+            uppercase: true,
+            lowercase: true,
+            numbers: true,
+            symbols: true,
+            length: 16,
+            counter: 1,
+            version: 2
+        }
+    };
+    SET_DEFAULT_OPTIONS(state, {
+        symbols: false,
+        length: 30
+    });
+    t.is(state.defaultOptions.length, 30);
+    t.false(state.defaultOptions.symbols);
 });
\ No newline at end of file