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diff --git a/CHANGES.md b/CHANGES.md

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--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,9 @@
+Synapse 1.0.0rc3 (2019-06-10)
+=============================
+
+Security: Fix authentication bug introduced in 1.0.0rc1. Please upgrade to rc3 immediately
+
+
 Synapse 1.0.0rc2 (2019-06-10)
 =============================