diff --git a/pelicanconf.py b/pelicanconf.py
index a86a110..005beba 100755
--- a/pelicanconf.py
+++ b/pelicanconf.py
@@ -11,7 +11,7 @@
 CURRENTYEAR = date.today().year
 
 LUCENE_LATEST_RELEASE = '8.9.0'
-LUCENE_LATEST_RELEASE_DATE = datetime(2021, 6, 17)
+LUCENE_LATEST_RELEASE_DATE = datetime(2021, 6, 16)
 LUCENE_PREVIOUS_MAJOR_RELEASE = '7.7.3'
 
 # This string will be appended to all unversioned css and js resources to prevent caching surprises on edits.