diff --git a/extension.json b/extension.json
index 6ca1375df..4a46dd0ba 100644
--- a/extension.json
+++ b/extension.json
@@ -7,7 +7,7 @@
 	"descriptionmsg": "discussiontools-desc",
 	"manifest_version": 2,
 	"requires": {
-		"MediaWiki": ">= 1.42.0",
+		"MediaWiki": ">= 1.43.0",
 		"extensions": {
 			"VisualEditor": "*",
 			"Linter": "*"
diff --git a/includes/ThreadItemStore.php b/includes/ThreadItemStore.php
index b9fa01e9d..df5f93799 100644
--- a/includes/ThreadItemStore.php
+++ b/includes/ThreadItemStore.php
@@ -87,6 +87,7 @@ class ThreadItemStore {
 			return [];
 		}
 
+		$dbr = $this->dbProvider->getReplicaDatabase();
 		$queryBuilder = $this->getIdsNamesBuilder()
 			->caller( __METHOD__ )
 			->where( [
@@ -94,7 +95,7 @@ class ThreadItemStore {
 				// Disallow querying for headings of sections that contain no comments.
 				// They all share the same name, so this would return a huge useless list on most wikis.
 				// (But we still store them, as we might need this data elsewhere.)
-				"it_itemname != 'h-'",
+				$dbr->expr( 'it_itemname', '!=', 'h-' ),
 			] );
 
 		if ( $limit !== null ) {
@@ -141,10 +142,11 @@ class ThreadItemStore {
 			// It might scan a bunch of rows...
 			// ->limit( 1 );
 
+		$dbr = $this->dbProvider->getReplicaDatabase();
 		$queryBuilder
 			->where( [
 				'it_itemname IN (' . $itemNameQueryBuilder->getSQL() . ')',
-				"it_itemname != 'h-'",
+				$dbr->expr( 'it_itemname', '!=', 'h-' ),
 			] );
 
 		if ( $limit !== null ) {
diff --git a/includes/TopicSubscriptionsPager.php b/includes/TopicSubscriptionsPager.php
index ff0ecd257..0cd81838f 100644
--- a/includes/TopicSubscriptionsPager.php
+++ b/includes/TopicSubscriptionsPager.php
@@ -264,7 +264,7 @@ class TopicSubscriptionsPager extends TablePager {
 			],
 			'conds' => [
 				'sub_user' => $this->getUser()->getId(),
-				'sub_state != ' . SubscriptionStore::STATE_UNSUBSCRIBED,
+				$this->getDatabase()->expr( 'sub_state', '!=', SubscriptionStore::STATE_UNSUBSCRIBED ),
 			],
 		];
 	}
diff --git a/maintenance/FixTrailingWhitespaceIds.php b/maintenance/FixTrailingWhitespaceIds.php
index f1e5e78a7..a876d6845 100644
--- a/maintenance/FixTrailingWhitespaceIds.php
+++ b/maintenance/FixTrailingWhitespaceIds.php
@@ -4,7 +4,6 @@ namespace MediaWiki\Extension\DiscussionTools\Maintenance;
 
 use LoggedUpdateMaintenance;
 use Wikimedia\Rdbms\DBQueryError;
-use Wikimedia\Rdbms\IDatabase;
 use Wikimedia\Rdbms\IExpression;
 use Wikimedia\Rdbms\LikeValue;
 
@@ -54,19 +53,17 @@ class FixTrailingWhitespaceIds extends LoggedUpdateMaintenance {
 				->from( 'discussiontools_item_ids' )
 				->field( 'itid_itemid' )
 				->where(
-					$dbw->makeList( [
+					$dbw->orExpr( [
 						$dbw->expr( 'itid_itemid', IExpression::LIKE, $like1 ),
 						$dbw->expr( 'itid_itemid', IExpression::LIKE, $like2 ),
 						$dbw->expr( 'itid_itemid', IExpression::LIKE, $like3 ),
-					], IDatabase::LIST_OR )
+					] )
 				)
 				->caller( __METHOD__ )
 				->limit( $this->getBatchSize() );
 
 			if ( $skippedIds ) {
-				$itemIdQueryBuilder->where(
-					'itid_itemid NOT IN (' . $dbw->makeList( $skippedIds ) . ')'
-				);
+				$itemIdQueryBuilder->where( $dbw->expr( 'itid_itemid', '!=', $skippedIds ) );
 			}
 
 			$itemIds = $itemIdQueryBuilder->fetchFieldValues();
diff --git a/maintenance/NewTopicOptOutActiveUsers.php b/maintenance/NewTopicOptOutActiveUsers.php
index 9d5771f69..2318d28bf 100644
--- a/maintenance/NewTopicOptOutActiveUsers.php
+++ b/maintenance/NewTopicOptOutActiveUsers.php
@@ -45,7 +45,7 @@ class NewTopicOptOutActiveUsers extends Maintenance {
 				'qcc_namespace' => NS_USER,
 			] )
 			->join( 'user', null, 'qcc_title=user_name' )
-			->where( [ 'user_editcount >= 100' ] )
+			->where( $this->dbw->expr( 'user_editcount', '>=', 100 ) )
 			->fields( [ 'user_id', 'user_name' ] )
 			->fetchResultSet();