diff --git a/components/config-provider/__tests__/__snapshots__/index.test.js.snap b/components/config-provider/__tests__/__snapshots__/index.test.js.snap
index b08c48f407..6edaff8dd6 100644
--- a/components/config-provider/__tests__/__snapshots__/index.test.js.snap
+++ b/components/config-provider/__tests__/__snapshots__/index.test.js.snap
@@ -11162,7 +11162,7 @@ exports[`ConfigProvider components Table configProvider 1`] = `
                       </div>
                     </div>
                     <i
-                      class="anticon anticon-filter config-table-filter-open config-dropdown-trigger"
+                      class="anticon anticon-filter config-table-filter-open config-dropdown-trigger config-dropdown-open"
                       title="Filter menu"
                     >
                       <svg
@@ -11345,7 +11345,7 @@ exports[`ConfigProvider components Table normal 1`] = `
                       </div>
                     </div>
                     <i
-                      class="anticon anticon-filter ant-table-filter-open ant-dropdown-trigger"
+                      class="anticon anticon-filter ant-table-filter-open ant-dropdown-trigger ant-dropdown-open"
                       title="Filter menu"
                     >
                       <svg
@@ -11528,7 +11528,7 @@ exports[`ConfigProvider components Table prefixCls 1`] = `
                       </div>
                     </div>
                     <i
-                      class="anticon anticon-filter prefix-Table-filter-open ant-dropdown-trigger"
+                      class="anticon anticon-filter prefix-Table-filter-open ant-dropdown-trigger ant-dropdown-open"
                       title="Filter menu"
                     >
                       <svg
diff --git a/components/dropdown/dropdown.tsx b/components/dropdown/dropdown.tsx
index edaa74a0bb..e5a3c3c534 100644
--- a/components/dropdown/dropdown.tsx
+++ b/components/dropdown/dropdown.tsx
@@ -23,6 +23,7 @@ export interface DropDownProps {
   forceRender?: boolean;
   mouseEnterDelay?: number;
   mouseLeaveDelay?: number;
+  openClassName?: string;
 }
 
 export default class Dropdown extends React.Component<DropDownProps, any> {
diff --git a/package.json b/package.json
index 7f49f0bcc2..fd37327498 100644
--- a/package.json
+++ b/package.json
@@ -61,7 +61,7 @@
     "rc-collapse": "~1.10.0",
     "rc-dialog": "~7.3.0",
     "rc-drawer": "~1.7.6",
-    "rc-dropdown": "~2.2.1",
+    "rc-dropdown": "~2.3.0",
     "rc-editor-mention": "^1.1.7",
     "rc-form": "^2.3.0",
     "rc-input-number": "~4.3.7",