diff --git a/build/shared/revisions.txt b/build/shared/revisions.txt
index 85a9160a94..1ac6853964 100644
--- a/build/shared/revisions.txt
+++ b/build/shared/revisions.txt
@@ -1,4 +1,4 @@
-ARDUINO 1.8.17 Not yet released
+ARDUINO 1.8.17 2021.12.14 SECURITY HOTFIX RELEASE
 
 [ide]
 * Upgrade log4j to 2.15.0 - CVE-2021-44228 (thanks @rhowe)