diff --git a/README.md b/README.md
index f32cb055..0d4f267f 100644
--- a/README.md
+++ b/README.md
@@ -182,6 +182,31 @@ Result:
 }
 ```
 
+#### Updating a voucher
+
+You can change some properties of a voucher that has been already created:
+- category
+- start date
+- expiration date
+- active
+- additinal info
+- metadata
+
+Other fields than listed above won't be modified. Even if provided they will be silently skipped.
+
+Use `voucherify.update(voucher_update)` to update a voucher.
+
+```python
+voucher_update = {
+  "code": "Summer-2016",
+  "category": "Season",
+  "start_date": "2016-07-01T00:00:00Z",
+  "expiration_date": "2016-08-31T23:59:59Z",
+}
+
+updated_voucher = voucherify.update(voucher_update)
+```
+
 #### Disabling a voucher
 
 `voucherify.disable(voucher_code)`
@@ -764,6 +789,7 @@ new_price = utils.calculate_price(base_price, voucher, unit_price)
 
 ### Changelog
 
+- **2016-07-18** - `1.3.0` - Update voucher
 - **2016-06-23** - `1.2.1` - Gift vouchers
 - **2016-06-16** - `1.2.0` - Unified naming convention
 - **2016-06-16** - `1.1.0` - Added customer methods
diff --git a/voucherify/client.py b/voucherify/client.py
index 6d33c2a4..7d872cc2 100644
--- a/voucherify/client.py
+++ b/voucherify/client.py
@@ -115,6 +115,15 @@ def create(self, voucher):
             data=json.dumps(voucher),
             method='POST'
         )
+        
+    def update(self, voucher_update):
+        path = '/vouchers/' + quote(voucher_update.get("code"))
+
+        return self.request(
+            path,
+            data=json.dumps(voucher_update),
+            method='PUT'
+        )
 
     def enable(self, code):
         path = '/vouchers/' + quote(code) + '/enable'