diff --git a/lib/submissions/create_from_submitters.rb b/lib/submissions/create_from_submitters.rb
index 771d5e42..6f1770f3 100644
--- a/lib/submissions/create_from_submitters.rb
+++ b/lib/submissions/create_from_submitters.rb
@@ -50,7 +50,7 @@ module Submissions
       template_fields.each do |f|
         next if f['submitter_uuid'] != submitter_uuid ||
                 (!f['name'].in?(readonly_fields) &&
-                 !f['name'].parameterize.underscore.in?(readonly_fields))
+                 !f['name'].to_s.parameterize.underscore.in?(readonly_fields))
 
         f['readonly'] = true
       end
@@ -62,7 +62,9 @@ module Submissions
       template_fields.each do |f|
         next if f['submitter_uuid'] != submitter_uuid
 
-        field_configs = fields.find { |e| e['name'] == f['name'] || e['name'] == f['name'].parameterize.underscore }
+        field_configs = fields.find do |e|
+          e['name'] == f['name'] || e['name'] == f['name'].to_s.parameterize.underscore
+        end
 
         next if field_configs.blank?
 
diff --git a/lib/submitters/normalize_values.rb b/lib/submitters/normalize_values.rb
index 024a4704..62c541e9 100644
--- a/lib/submitters/normalize_values.rb
+++ b/lib/submitters/normalize_values.rb
@@ -41,7 +41,7 @@ module Submitters
     end
 
     def build_fields_index(fields)
-      fields.index_by { |e| e['name'] }.merge(fields.index_by { |e| e['name'].parameterize.underscore })
+      fields.index_by { |e| e['name'] }.merge(fields.index_by { |e| e['name'].to_s.parameterize.underscore })
     end
 
     def normalize_attachment_value(value, account)