diff --git a/src/Dao/EntityConverters/AbstractEntityConverter.php b/src/Dao/EntityConverters/AbstractEntityConverter.php
index b46b4340..7e92465e 100644
--- a/src/Dao/EntityConverters/AbstractEntityConverter.php
+++ b/src/Dao/EntityConverters/AbstractEntityConverter.php
@@ -42,6 +42,6 @@ abstract class AbstractEntityConverter implements IEntityConverter
 
 	protected function entityTimeToDbTime($time)
 	{
-		return $time;
+		return $time === null ? null : date('Y-m-d H:i:s', strtotime($time));
 	}
 }
diff --git a/src/Dao/EntityConverters/TagEntityConverter.php b/src/Dao/EntityConverters/TagEntityConverter.php
index 1c6760b7..0c3726c6 100644
--- a/src/Dao/EntityConverters/TagEntityConverter.php
+++ b/src/Dao/EntityConverters/TagEntityConverter.php
@@ -11,7 +11,7 @@ class TagEntityConverter extends AbstractEntityConverter implements IEntityConve
 		[
 			'name' => $entity->getName(),
 			'creationTime' => $this->entityTimeToDbTime($entity->getCreationTime()),
-			'banned' => $entity->isBanned(),
+			'banned' => intval($entity->isBanned()),
 			'category' => $entity->getCategory(),
 		];
 	}
diff --git a/src/Dao/EntityConverters/UserEntityConverter.php b/src/Dao/EntityConverters/UserEntityConverter.php
index 4d502b26..6186fd25 100644
--- a/src/Dao/EntityConverters/UserEntityConverter.php
+++ b/src/Dao/EntityConverters/UserEntityConverter.php
@@ -19,8 +19,8 @@ class UserEntityConverter extends AbstractEntityConverter implements IEntityConv
 			'lastLoginTime' => $this->entityTimeToDbTime($entity->getLastLoginTime()),
 			'avatarStyle' => $entity->getAvatarStyle(),
 			'browsingSettings' => json_encode($entity->getBrowsingSettings()),
-			'accountConfirmed' => $entity->isAccountConfirmed(),
-			'banned' => $entity->isBanned(),
+			'accountConfirmed' => intval($entity->isAccountConfirmed()),
+			'banned' => intval($entity->isBanned()),
 		];
 	}