diff --git a/CHANGELOG.md b/CHANGELOG.md
index 17293d68..461c54ab 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,9 @@ _Note: Gaps between patch versions are faulty, broken or test releases._
 
 <!-- Add changelog entries for new changes under this section -->
 
+ * **Improvement**
+   * Persist "Show content of concatenated modules" option ([#322](https://github.com/webpack-contrib/webpack-bundle-analyzer/pull/322) by [@lorenzos](https://github.com/lorenzos))
+
 ## 3.6.1
 
  * **Bug Fix**
diff --git a/client/components/ModulesTreemap.jsx b/client/components/ModulesTreemap.jsx
index 0b4d0f3f..051a7d87 100644
--- a/client/components/ModulesTreemap.jsx
+++ b/client/components/ModulesTreemap.jsx
@@ -5,6 +5,7 @@ import {computed} from 'mobx';
 import {observer} from 'mobx-preact';
 
 import {isChunkParsed} from '../utils';
+import localStorage from '../localStorage';
 import Treemap from './Treemap';
 import Tooltip from './Tooltip';
 import Switcher from './Switcher';
@@ -208,6 +209,11 @@ export default class ModulesTreemap extends Component {
 
   handleConcatenatedModulesContentToggle = flag => {
     store.showConcatenatedModulesContent = flag;
+    if (flag) {
+      localStorage.setItem('showConcatenatedModulesContent', true);
+    } else {
+      localStorage.removeItem('showConcatenatedModulesContent');
+    }
   }
 
   handleChunkContextMenuHide = () => {
diff --git a/client/localStorage.js b/client/localStorage.js
new file mode 100644
index 00000000..cdd1b591
--- /dev/null
+++ b/client/localStorage.js
@@ -0,0 +1,25 @@
+const KEY_PREFIX = 'wba';
+
+export default {
+
+  getItem(key) {
+    try {
+      return JSON.parse(window.localStorage.getItem(`${KEY_PREFIX}.${key}`));
+    } catch (err) {
+      return null;
+    }
+  },
+
+  setItem(key, value) {
+    try {
+      window.localStorage.setItem(`${KEY_PREFIX}.${key}`, JSON.stringify(value));
+    } catch (err) { /* ignored */ }
+  },
+
+  removeItem(key) {
+    try {
+      window.localStorage.removeItem(`${KEY_PREFIX}.${key}`);
+    } catch (err) { /* ignored */ }
+  }
+
+};
diff --git a/client/store.js b/client/store.js
index 41f27ad0..5710a8a0 100644
--- a/client/store.js
+++ b/client/store.js
@@ -1,5 +1,6 @@
 import {observable, computed} from 'mobx';
 import {isChunkParsed, walkModules} from './utils';
+import localStorage from './localStorage';
 
 export class Store {
   cid = 0;
@@ -10,7 +11,7 @@ export class Store {
   @observable searchQuery = '';
   @observable defaultSize;
   @observable selectedSize;
-  @observable showConcatenatedModulesContent = false;
+  @observable showConcatenatedModulesContent = (localStorage.getItem('showConcatenatedModulesContent') === true);
 
   setModules(modules) {
     walkModules(modules, module => {