diff --git a/CHANGELOG-PUBLIC.md b/CHANGELOG-PUBLIC.md
index ba2f7b3..d9cb98f 100644
--- a/CHANGELOG-PUBLIC.md
+++ b/CHANGELOG-PUBLIC.md
@@ -588,3 +588,7 @@ MNB-1429 Ensure correct method code is passed to shipping insights
 MNB-1471 Add cache timeout. MNB-1465 Ensure order comment containing packing info is accurate. MNB-1464 Dont send details to Shipping Insights for non SHQ methods
 
 
+## 20.45.1 (2021-08-04)
+MNB-1493 Move UK out of list of countries where postcode is optional
+
+
diff --git a/CHANGELOG.MD b/CHANGELOG.MD
index ba2f7b3..d9cb98f 100755
--- a/CHANGELOG.MD
+++ b/CHANGELOG.MD
@@ -588,3 +588,7 @@ MNB-1429 Ensure correct method code is passed to shipping insights
 MNB-1471 Add cache timeout. MNB-1465 Ensure order comment containing packing info is accurate. MNB-1464 Dont send details to Shipping Insights for non SHQ methods
 
 
+## 20.45.1 (2021-08-04)
+MNB-1493 Move UK out of list of countries where postcode is optional
+
+
diff --git a/composer.json b/composer.json
index 6efab89..e8fd8d2 100755
--- a/composer.json
+++ b/composer.json
@@ -2,7 +2,7 @@
   "name": "shipperhq/module-shipper",
   "description": "Magento Shipping integration with ShipperHQ",
   "type": "magento2-module",
-  "version": "20.45.0",
+  "version": "20.45.1",
   "license": [
     "OSL-3.0",
     "AFL-3.0"
diff --git a/src/composer.json b/src/composer.json
index 8b2d079..3510d1c 100644
--- a/src/composer.json
+++ b/src/composer.json
@@ -2,7 +2,7 @@
   "name": "shipperhq/module-shipper",
   "description": "Magento Shipping integration with ShipperHQ",
   "type": "magento2-module",
-  "version": "20.45.0",
+  "version": "20.45.1",
   "license": [
     "OSL-3.0",
     "AFL-3.0"
diff --git a/src/etc/config.xml b/src/etc/config.xml
index bcccb40..fe753f4 100755
--- a/src/etc/config.xml
+++ b/src/etc/config.xml
@@ -35,6 +35,11 @@
 -->
 <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Store:etc/config.xsd">
     <default>
+        <general>
+            <country>
+                <optional_zip_countries>HK,IE,MO,PA</optional_zip_countries> <!-- MNB-1493 Postcodes are madatory in UK. Removed UK from list by default -->
+            </country>
+        </general>
         <carriers>
             <shipper>
                 <active>0</active>
@@ -62,7 +67,7 @@
                 <ws_timeout>30</ws_timeout>
                 <use_cache>0</use_cache>
                 <always_use_cache>1</always_use_cache>
-                <extension_version>20.45.0</extension_version>
+                <extension_version>20.45.1</extension_version>
                 <allowed_methods></allowed_methods>
                 <magento_version></magento_version>
                 <cache_timeout>300</cache_timeout>