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diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -81,6 +81,7 @@ API
 | minuteStep              | Number                            | 1 | interval between minutes in picker  |
 | secondStep              | Number                            | 1 | interval between seconds in picker  |
 | focusOnOpen             | Boolean                           | false | automatically focus the input when the picker opens |
+| inputReadOnly             | Boolean                           | false | set input to read only |
 
 ## Test Case