diff --git a/toargridding/metadata.py b/toargridding/metadata.py
index b96deda485d415636325aa60f5a9fc5486e0e5de..14f4e4eac3f2339c66a2d0a319183a0652d1bd1d 100644
--- a/toargridding/metadata.py
+++ b/toargridding/metadata.py
@@ -149,7 +149,7 @@ class Metadata:
 
         For example, used for saving link to results of a request in the cache.
         """
-        addition = "_".join(str(i) for i in sorted(self.moreOptions.values()))
+        addition = "_".join(f"{key}-{val}" for key, val in sorted(self.moreOptions.items()))
         return "_".join(str(i) for i in [self.variable.name, self.statistic, self.time.daterange_option, addition, "at", datetime.now().date().isoformat()])
 
     def get_title(self) -> str: