diff --git a/lib/Db/Bookmark.php b/lib/Db/Bookmark.php
index a1e043076..0f7e49dd0 100644
--- a/lib/Db/Bookmark.php
+++ b/lib/Db/Bookmark.php
@@ -30,9 +30,7 @@
  * @method int getArchivedFile()
  * @method setArchivedFile(int $fileId)
  * @method string getTextContent()
- * @method setTextContent(string $content)
  * @method string getHtmlContent()
- * @method setHtmlContent(string $content)
  * @method string getUserId()
  * @method setUserId(string $userId)
  */
@@ -110,6 +108,8 @@ public function setTitle(string $title): void {
 		if (strlen($title) > 1024) {
 			$title = substr($title, 0, 1020) . '…';
 		}
+		// Remove non-utf-8 characters from string: https://stackoverflow.com/questions/1401317/remove-non-utf8-characters-from-string
+		$title = mb_convert_encoding($title, 'UTF-8', 'UTF-8');
 		$this->setter('title', [$title]);
 	}
 
@@ -118,9 +118,37 @@ public function setDescription(string $desc): void {
 		if (strlen($desc) > 1024) {
 			$desc = substr($desc, 0, 1020) . '…';
 		}
+		// Remove non-utf-8 characters from string: https://stackoverflow.com/questions/1401317/remove-non-utf8-characters-from-string
+		$desc = mb_convert_encoding($desc, 'UTF-8', 'UTF-8');
 		$this->setter('description', [$desc]);
 	}
 
+	public function setTextContent(?string $content): void {
+		if ($content === null) {
+			// Remove non-utf-8 characters from string: https://stackoverflow.com/questions/1401317/remove-non-utf8-characters-from-string
+			$content = mb_convert_encoding($content, 'UTF-8', 'UTF-8');
+		}
+		$this->setter('textContent', [$content]);
+	}
+
+	public function getTextContent(): string {
+		// Remove non-utf-8 characters from string: https://stackoverflow.com/questions/1401317/remove-non-utf8-characters-from-string
+		return mb_convert_encoding($this->textContent, 'UTF-8', 'UTF-8');
+	}
+
+	public function setHtmlContent(?string $content): void {
+		if ($content === null) {
+			// Remove non-utf-8 characters from string: https://stackoverflow.com/questions/1401317/remove-non-utf8-characters-from-string
+			$content = mb_convert_encoding($content, 'UTF-8', 'UTF-8');
+		}
+		$this->setter('htmlContent', [$content]);
+	}
+
+	public function getHtmlContent(): string {
+		// Remove non-utf-8 characters from string: https://stackoverflow.com/questions/1401317/remove-non-utf8-characters-from-string
+		return mb_convert_encoding($this->htmlContent, 'UTF-8', 'UTF-8');
+	}
+
 	public function isWebLink() {
 		return (bool) preg_match('/^https?:/i', $this->getUrl());
 	}