diff --git a/gcode_metadata/metadata.py b/gcode_metadata/metadata.py
index 456c40d..7ceadbb 100644
--- a/gcode_metadata/metadata.py
+++ b/gcode_metadata/metadata.py
@@ -283,8 +283,8 @@ def load_cache(self):
         try:
             with open(self.cache_name, "r", encoding='utf-8') as file:
                 cache_data = json.load(file)
-                preview = cache_data["preview"]
-                icon = cache_data["icon"]
+                preview = cache_data.get("preview")
+                icon = cache_data.get("icon")
 
             self.thumbnails = {}