diff --git a/docs/src/introduction.md b/docs/src/introduction.md
index 2cb9831..336fa44 100644
--- a/docs/src/introduction.md
+++ b/docs/src/introduction.md
@@ -1,5 +1,15 @@
 # SNUCSE GPU Service 3.0
 
+<div class="warning">
+
+SGS 3.0 is still in development. The documents here are displayed for review,
+and may not reflect the state of the service at the time of launch.
+
+We are not currently approving workspace requests. If you wish to preview the
+service, please contact us via email.
+
+</div>
+
 SNUCSE GPU Service (SGS) 3.0 is a free service provided to students in the SNU
 CSE department. Before using this service, make sure you read this manual very
 carefully.