diff --git a/custom_components/bibliotek_dk/library_api.py b/custom_components/bibliotek_dk/library_api.py
index c6662e4..973602a 100644
--- a/custom_components/bibliotek_dk/library_api.py
+++ b/custom_components/bibliotek_dk/library_api.py
@@ -230,7 +230,7 @@ def _getMaterialInfo(self, material) -> tuple:
         try:
             if materialTitle:
                 materialTitle = materialTitle.string
-            if "(" in materialTitle:
+            if materialTitle and "(" in materialTitle:
                 materialTitle = materialTitle.split("(")[0].strip()
         except (AttributeError, KeyError) as err:
             _LOGGER.error("Error searching for the title. Error: %s", err)
diff --git a/custom_components/bibliotek_dk/manifest.json b/custom_components/bibliotek_dk/manifest.json
index b2a2428..7b61555 100644
--- a/custom_components/bibliotek_dk/manifest.json
+++ b/custom_components/bibliotek_dk/manifest.json
@@ -9,5 +9,5 @@
   "codeowners": ["@J-Lindvig"],
   "requirements": ["beautifulsoup4", "html.parser"],
   "iot_class": "cloud_polling",
-  "version": "0.3.5"
+  "version": "0.3.6"
 }