diff --git a/src/number-keyboard/README.md b/src/number-keyboard/README.md
index a9381d5bd..96ac18eca 100644
--- a/src/number-keyboard/README.md
+++ b/src/number-keyboard/README.md
@@ -103,6 +103,7 @@ Use `title` prop to set keyboard title.
 </van-cell>
 <van-number-keyboard
   :show="show"
+  theme="custom"
   :extra-key="['00', '.']"
   close-button-text="Close"
   @blur="show = false"
diff --git a/src/number-keyboard/README.zh-CN.md b/src/number-keyboard/README.zh-CN.md
index 2f7b22bad..6078a2b54 100644
--- a/src/number-keyboard/README.zh-CN.md
+++ b/src/number-keyboard/README.zh-CN.md
@@ -114,6 +114,7 @@ export default {
 </van-cell>
 <van-number-keyboard
   :show="show"
+  theme="custom"
   :extra-key="['00', '.']"
   close-button-text="完成"
   @blur="show = false"