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+++ b/README.md
@@ -2,7 +2,7 @@
 
 Champions: Guy Bedford, Bradley Farias, Michael Ficarra
 
-Status: stage 3
+Status: stage 4
 
 ## Problem Statement
 
diff --git a/spec.html b/spec.html
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@@ -4,7 +4,7 @@
 <pre class="metadata">
 title: Well-Formed Unicode Strings
 status: proposal
-stage: 3
+stage: 4
 location: https://tc39.es/proposal-is-usv-string
 copyright: false
 contributors: Guy Bedford, Bradley Farias, Michael Ficarra