diff --git a/ext_emconf.php b/ext_emconf.php
index 28b2b9d..1f76091 100644
--- a/ext_emconf.php
+++ b/ext_emconf.php
@@ -14,7 +14,7 @@
     'uploadfolder' => '0',
     'createDirs' => '',
     'clearCacheOnLoad' => 0,
-    'version' => '5.2.0',
+    'version' => '5.2.1',
     'constraints' => [
         'depends' => [
             'typo3' => '8.0.0-10.9.99',
diff --git a/ext_tables.sql b/ext_tables.sql
index 888da26..dea5598 100644
--- a/ext_tables.sql
+++ b/ext_tables.sql
@@ -40,8 +40,9 @@ CREATE TABLE tx_nsnewscomments_domain_model_comment (
 	PRIMARY KEY (uid),
 	KEY parent (pid),
 	KEY t3ver_oid (t3ver_oid,t3ver_wsid),
-    KEY language (l10n_parent,sys_language_uid)
+    KEY language (l10n_parent,sys_language_uid),
 
+    INDEX commentData (comment,deleted,hidden,t3ver_state,starttime,endtime)
 );
 
 #