diff --git a/client/src/containers/Customers/CustomersLanding/components.js b/client/src/containers/Customers/CustomersLanding/components.js
index 7b824dbcf..08e9cb893 100644
--- a/client/src/containers/Customers/CustomersLanding/components.js
+++ b/client/src/containers/Customers/CustomersLanding/components.js
@@ -35,7 +35,7 @@ export function ActionsMenu({
         onClick={safeCallback(onEdit, original)}
       />
       <MenuItem
-        icon={<Icon icon="duplicate-18" />}
+        icon={<Icon icon="duplicate-16" />}
         text={formatMessage({ id: 'duplicate' })}
         onClick={safeCallback(onDuplicate, original)}
       />
diff --git a/client/src/containers/Items/components.js b/client/src/containers/Items/components.js
index 24af7fb21..9e33ca911 100644
--- a/client/src/containers/Items/components.js
+++ b/client/src/containers/Items/components.js
@@ -96,7 +96,7 @@ export function ItemsActionMenuList({
         onClick={safeCallback(onEditItem, original)}
       />
       <MenuItem
-        icon={<Icon icon="duplicate-18" />}
+        icon={<Icon icon="duplicate-16" />}
         text={formatMessage({ id: 'duplicate' })}
         onClick={safeCallback(onDuplicate, original)}
       />
diff --git a/client/src/containers/Purchases/Bills/BillsLanding/components.js b/client/src/containers/Purchases/Bills/BillsLanding/components.js
index 0aa2d04a0..31ca5750c 100644
--- a/client/src/containers/Purchases/Bills/BillsLanding/components.js
+++ b/client/src/containers/Purchases/Bills/BillsLanding/components.js
@@ -38,6 +38,7 @@ export function ActionsMenu({
 
       <If condition={!original.is_open}>
         <MenuItem
+          icon={<Icon icon={'check'} iconSize={18} />}
           text={formatMessage({ id: 'mark_as_opened' })}
           onClick={safeCallback(onOpen, original)}
         />
diff --git a/client/src/containers/Vendors/VendorsLanding/components.js b/client/src/containers/Vendors/VendorsLanding/components.js
index 15ad5dc36..239df38a1 100644
--- a/client/src/containers/Vendors/VendorsLanding/components.js
+++ b/client/src/containers/Vendors/VendorsLanding/components.js
@@ -34,7 +34,7 @@ export function ActionsMenu({
         onClick={safeCallback(onEdit, original)}
       />
       <MenuItem
-        icon={<Icon icon="duplicate-18" />}
+        icon={<Icon icon="duplicate-16" />}
         text={formatMessage({ id: 'duplicate' })}
         onClick={safeCallback(onDuplicate, original)}
       />
diff --git a/client/src/hooks/query/bills.js b/client/src/hooks/query/bills.js
index 34d762866..b730a5246 100644
--- a/client/src/hooks/query/bills.js
+++ b/client/src/hooks/query/bills.js
@@ -123,7 +123,7 @@ export function useOpenBill(props) {
   const apiRequest = useApiRequest();
 
   return useMutation(
-    (id) => apiRequest.delete(`purchases/bills/${id}/open`),
+    (id) => apiRequest.post(`purchases/bills/${id}/open`),
     {
       onSuccess: () => {
         queryClient.invalidateQueries('BILLS');
diff --git a/client/src/static/json/icons.js b/client/src/static/json/icons.js
index 7ca4d037a..d5e8b7f9a 100644
--- a/client/src/static/json/icons.js
+++ b/client/src/static/json/icons.js
@@ -406,10 +406,10 @@ export default {
     ],
     viewBox: '0 0 24 24',
   },
-  'duplicate-18': {
+  'duplicate-16': {
     path: [
-      'M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z',
+      'M15 0H5c-.55 0-1 .45-1 1v2h2V2h8v7h-1v2h2c.55 0 1-.45 1-1V1c0-.55-.45-1-1-1zm-4 4H1c-.55 0-1 .45-1 1v10c0 .55.45 1 1 1h10c.55 0 1-.45 1-1V5c0-.55-.45-1-1-1zm-1 10H2V6h8v8z',
     ],
-    viewBox: '0 0 24 24',
+    viewBox: '0 0 16 16',
   },
 };