diff --git a/src/js/components/Form.js b/src/js/components/Form.js
index 5da682b..0175d8c 100644
--- a/src/js/components/Form.js
+++ b/src/js/components/Form.js
@@ -29,7 +29,7 @@ class Form extends Component {
 
   isValid = () => {
     const { changeset } = this.props
-    return ["assignment_id", "task_id", "hours"].map(prop => changeset[prop]).every(Boolean)
+    return ["assignment_id", "task_id"].map(prop => changeset[prop]).every(Boolean)
   }
 
   handleTextareaKeyDown = event => {