diff --git a/lib/Db/CacheActorsRequest.php b/lib/Db/CacheActorsRequest.php
index 7a3f0ff2..8698b29f 100644
--- a/lib/Db/CacheActorsRequest.php
+++ b/lib/Db/CacheActorsRequest.php
@@ -66,6 +66,11 @@ class CacheActorsRequest extends CacheActorsRequestBuilder {
 	 * @return int
 	 */
 	public function save(Person $actor): int {
+		$source = $actor->getSource();
+		if (sizeof($source) >= CoreRequestBuilder::SOURCE_LENGTH) {
+			$source = 'too_big';
+		}
+
 		$qb = $this->getCacheActorsInsertSql();
 		$qb->setValue('id', $qb->createNamedParameter($actor->getId()))
 		   ->setValue('account', $qb->createNamedParameter($actor->getAccount()))
@@ -84,7 +89,7 @@ class CacheActorsRequest extends CacheActorsRequestBuilder {
 		   ->setValue('name', $qb->createNamedParameter($actor->getName()))
 		   ->setValue('summary', $qb->createNamedParameter($actor->getSummary()))
 		   ->setValue('public_key', $qb->createNamedParameter($actor->getPublicKey()))
-		   ->setValue('source', $qb->createNamedParameter($actor->getSource()))
+		   ->setValue('source', $qb->createNamedParameter($source))
 		   ->setValue('details', $qb->createNamedParameter(json_encode($actor->getDetails())))
 		   ->setValue(
 			   'creation',
diff --git a/lib/Db/CoreRequestBuilder.php b/lib/Db/CoreRequestBuilder.php
index 7176ed8c..8f594ddd 100644
--- a/lib/Db/CoreRequestBuilder.php
+++ b/lib/Db/CoreRequestBuilder.php
@@ -64,6 +64,9 @@ class CoreRequestBuilder {
 	const TABLE_CACHE_DOCUMENTS = 'social_cache_documents';
 
 
+	const SOURCE_LENGTH = 10000;
+
+
 	/** @var IDBConnection */
 	protected $dbConnection;
 
diff --git a/lib/Db/NotesRequest.php b/lib/Db/NotesRequest.php
index 9e687e25..10b155e7 100644
--- a/lib/Db/NotesRequest.php
+++ b/lib/Db/NotesRequest.php
@@ -68,6 +68,11 @@ class NotesRequest extends NotesRequestBuilder {
 		$dTime = new DateTime();
 		$dTime->setTimestamp($note->getPublishedTime());
 
+		$source = $note->getSource();
+		if (sizeof($source) >= CoreRequestBuilder::SOURCE_LENGTH) {
+			$source = 'too_big';
+		}
+
 		$qb = $this->getNotesInsertSql();
 		$qb->setValue('id', $qb->createNamedParameter($note->getId()))
 		   ->setValue('type', $qb->createNamedParameter($note->getType()))
@@ -95,7 +100,7 @@ class NotesRequest extends NotesRequestBuilder {
 		   )
 		   ->setValue('attributed_to', $qb->createNamedParameter($note->getAttributedTo()))
 		   ->setValue('in_reply_to', $qb->createNamedParameter($note->getInReplyTo()))
-		   ->setValue('source', $qb->createNamedParameter($note->getSource()))
+		   ->setValue('source', $qb->createNamedParameter($source))
 		   ->setValue(
 			   'instances', $qb->createNamedParameter(
 			   json_encode($note->getInstancePaths(), JSON_UNESCAPED_SLASHES)