diff --git a/dev-tools/doap/lucene.rdf b/dev-tools/doap/lucene.rdf
index e47eaf32702..166688690e2 100644
--- a/dev-tools/doap/lucene.rdf
+++ b/dev-tools/doap/lucene.rdf
@@ -66,6 +66,13 @@
       </foaf:Person>
     </maintainer>
 
+    <release>
+      <Version>
+        <name>lucene-6.6.0</name>
+        <created>2017-06-06</created>
+	<revision>6.6.0</revision>
+      </Version>
+    </release>
     <release>
       <Version>
         <name>lucene-6.5.1</name>
diff --git a/dev-tools/doap/solr.rdf b/dev-tools/doap/solr.rdf
index eb92a96de08..a6000faf854 100644
--- a/dev-tools/doap/solr.rdf
+++ b/dev-tools/doap/solr.rdf
@@ -66,6 +66,13 @@
       </foaf:Person>
     </maintainer>
 
+    <release>
+      <Version>
+        <name>solr-6.6.0</name>
+        <created>2017-06-06</created>
+        <revision>6.6.0</revision>
+      </Version>
+    </release>
     <release>
       <Version>
         <name>solr-6.5.1</name>