diff --git a/CHANGES.txt b/CHANGES.txt
index 5a95e74aae9..d3a55573b68 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,3 +1,6 @@
+6.8.4.15 - 2021-12-21
+ * Upgrade log4j 2.17.0 to fix CVE-2021-45105
+
 6.8.4.14 - 2021-12-14
   * Upgrade log4j 2.16.0 to fix CVE-2021-44228
 
diff --git a/buildSrc/version.properties b/buildSrc/version.properties
index 364618a7a60..400178da166 100644
--- a/buildSrc/version.properties
+++ b/buildSrc/version.properties
@@ -1,4 +1,4 @@
-elasticsearch     = 6.8.4.14
+elasticsearch     = 6.8.4.15
 elasticsearch_vanilla = 6.8.4
 cassandra         = 3.11.9.1
 lucene            = 7.7.2
diff --git a/docs/elassandra/source/conf.py b/docs/elassandra/source/conf.py
index e9435c19526..22180bcae57 100644
--- a/docs/elassandra/source/conf.py
+++ b/docs/elassandra/source/conf.py
@@ -65,9 +65,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = u'6.8.4.14'
+version = u'6.8.4.15'
 # The full version, including alpha/beta/rc tags.
-release = u'6.8.4.14'
+release = u'6.8.4.15'
 
 tgz_url = "https://github.com/strapdata/elassandra/releases/download/v{0}/elassandra-{0}.tar.gz".format(release)
 deb_url = "https://github.com/strapdata/elassandra/releases/download/v{0}/elassandra-{0}.deb".format(release)