diff --git a/app/models/metadata_geo.rb b/app/models/metadata_geo.rb
index ba11f337..d475edf9 100644
--- a/app/models/metadata_geo.rb
+++ b/app/models/metadata_geo.rb
@@ -14,7 +14,7 @@ class MetadataGeo < MetadataTemplate
     return true unless changed?
     return true if empty?
 
-    self[:value] = value.transform_values(&:to_f)
+    self[:value] = value.transform_values(&:to_f).to_h
     self[:value] = encrypt(value) if private?
 
     true