diff --git a/src/main/groovy/server.groovy b/src/main/groovy/server.groovy
index 63960cac..0917355e 100644
--- a/src/main/groovy/server.groovy
+++ b/src/main/groovy/server.groovy
@@ -229,6 +229,7 @@ rm.get("/candidates/:candidate/:version/download", downloadHandler)
 rm.get("/download/:candidate/:version", downloadHandler)
 
 def versionHandler = { req ->
+	addPlainTextHeader req
 	req.response.end GVM_VERSION
 }