diff --git a/data/configuration.example.yaml b/data/configuration.example.yaml
index 0bc67286..f0b2ae69 100644
--- a/data/configuration.example.yaml
+++ b/data/configuration.example.yaml
@@ -25,3 +25,5 @@ advanced:
   network_key: GENERATE
   # Let Zigbee2MQTT generate a pan_id on first start
   pan_id: GENERATE
+  # Let Zigbee2MQTT generate a ext_pan_id on first start
+  ext_pan_id: GENERATE
diff --git a/lib/types/types.d.ts b/lib/types/types.d.ts
index d5ada21c..1396ee63 100644
--- a/lib/types/types.d.ts
+++ b/lib/types/types.d.ts
@@ -257,7 +257,7 @@ declare global {
             log_level: 'debug' | 'info' | 'error' | 'warn',
             log_syslog: KeyValue,
             pan_id: number | 'GENERATE',
-            ext_pan_id: number[],
+            ext_pan_id: number[] | 'GENERATE',
             channel: number,
             adapter_concurrent: number | null,
             adapter_delay: number | null,
diff --git a/lib/util/settings.schema.json b/lib/util/settings.schema.json
index fe74ef0d..d7d58fb2 100644
--- a/lib/util/settings.schema.json
+++ b/lib/util/settings.schema.json
@@ -582,10 +582,18 @@
           "description": "ZigBee pan ID, changing requires repairing all devices!"
         },
         "ext_pan_id": {
-          "type": "array",
-          "items": {
-            "type": "number"
-          },
+          "oneOf": [{
+            "type": "string",
+            "title": "Extended pan ID (string)"
+            },
+            {
+              "type": "array",
+              "items": {
+                "type": "number"
+              },
+              "title": "Extended pan ID (array)"
+            }
+          ],
           "title": "Ext Pan ID",
           "requiresRestart": true,
           "description": "Zigbee extended pan ID, changing requires repairing all devices!"
diff --git a/lib/util/settings.ts b/lib/util/settings.ts
index 55b4898e..162bca80 100644
--- a/lib/util/settings.ts
+++ b/lib/util/settings.ts
@@ -285,6 +285,11 @@ export function validate(): string[] {
         errors.push(`advanced.pan_id: should be number or 'GENERATE' (is '${_settings.advanced.pan_id}')`);
     }
 
+    if (_settings.advanced && _settings.advanced.ext_pan_id && typeof _settings.advanced.ext_pan_id === 'string' &&
+        _settings.advanced.ext_pan_id !== 'GENERATE') {
+        errors.push(`advanced.ext_pan_id: should be array or 'GENERATE' (is '${_settings.advanced.ext_pan_id}')`);
+    }
+
     // Verify that all friendly names are unique
     const names: string[] = [];
     const check = (e: DeviceOptions | GroupOptions): void => {
diff --git a/lib/zigbee.ts b/lib/zigbee.ts
index 6ecc257c..d73102de 100644
--- a/lib/zigbee.ts
+++ b/lib/zigbee.ts
@@ -28,7 +28,8 @@ export default class Zigbee {
             network: {
                 panID: settings.get().advanced.pan_id === 'GENERATE' ?
                     this.generatePanID() : settings.get().advanced.pan_id as number,
-                extendedPanID: settings.get().advanced.ext_pan_id,
+                extendedPanID: settings.get().advanced.ext_pan_id === 'GENERATE' ?
+                    this.generateExtPanID() : settings.get().advanced.ext_pan_id as number[],
                 channelList: [settings.get().advanced.channel],
                 networkKey: settings.get().advanced.network_key === 'GENERATE' ?
                     this.generateNetworkKey() : settings.get().advanced.network_key as number[],
@@ -170,6 +171,12 @@ export default class Zigbee {
         return key;
     }
 
+    private generateExtPanID(): number[] {
+        const key = Array.from({length: 8}, () => randomInt(256));
+        settings.set(['advanced', 'ext_pan_id'], key);
+        return key;
+    }
+
     private generatePanID(): number {
         const panID = randomInt(1, 0xFFFF - 1);
         settings.set(['advanced', 'pan_id'], panID);
diff --git a/test/controller.test.js b/test/controller.test.js
index ffc2574c..4f98b65a 100644
--- a/test/controller.test.js
+++ b/test/controller.test.js
@@ -103,14 +103,17 @@ describe('Controller', () => {
         expect(MQTT.connect).toHaveBeenCalledWith("mqtt://localhost", expected);
     });
 
-    it('Should generate network_key and pan_id when set to GENERATE', async () => {
+    it('Should generate network_key, pan_id and ext_pan_id when set to GENERATE', async () => {
         settings.set(['advanced', 'network_key'], 'GENERATE');
         settings.set(['advanced', 'pan_id'], 'GENERATE');
+        settings.set(['advanced', 'ext_pan_id'], 'GENERATE');
         await controller.start();
         await flushPromises();
         expect(zigbeeHerdsman.constructor.mock.calls[0][0].network.networkKey.length).toStrictEqual(16);
+        expect(zigbeeHerdsman.constructor.mock.calls[0][0].network.extendedPanID.length).toStrictEqual(8);
         expect(zigbeeHerdsman.constructor.mock.calls[0][0].network.panID).toStrictEqual(expect.any(Number));
         expect(data.read().advanced.network_key.length).toStrictEqual(16);
+        expect(data.read().advanced.ext_pan_id.length).toStrictEqual(8);
         expect(data.read().advanced.pan_id).toStrictEqual(expect.any(Number));
     });
 
diff --git a/test/settings.test.js b/test/settings.test.js
index 4165d193..8171799a 100644
--- a/test/settings.test.js
+++ b/test/settings.test.js
@@ -682,6 +682,18 @@ describe('Settings', () => {
         }).toThrow(new Error("Device '0x123' already exists"));
     });
 
+    it('Should not allow any string values for ext_pan_id', () => {
+        write(configurationFile, {
+            ...minimalConfig,
+            advanced: {ext_pan_id: 'NOT_GENERATE'},
+        });
+
+        settings.reRead();
+
+        const error = `advanced.ext_pan_id: should be array or 'GENERATE' (is 'NOT_GENERATE')`;
+        expect(settings.validate()).toEqual(expect.arrayContaining([error]));
+    });
+
     it('Should not allow any string values for network_key', () => {
         write(configurationFile, {
             ...minimalConfig,