diff --git a/Gemfile.lock b/Gemfile.lock
index 37eaaceee..06f3e6de2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -83,7 +83,7 @@ GEM
     ast (2.4.2)
     attr_extras (7.1.0)
     base64 (0.2.0)
-    bigdecimal (3.1.4)
+    bigdecimal (3.1.5)
     bootsnap (1.17.0)
       msgpack (~> 1.2)
     builder (3.2.4)
@@ -244,13 +244,13 @@ GEM
       sprockets-rails
     graphql (2.1.7)
       racc (~> 1.4)
-    hashdiff (1.0.1)
+    hashdiff (1.1.0)
     hashie (5.0.0)
     honeybadger (5.4.0)
     i18n (1.14.1)
       concurrent-ruby (~> 1.0)
     ice_nine (0.11.2)
-    io-console (0.6.0)
+    io-console (0.7.1)
     irb (1.10.1)
       rdoc
       reline (>= 0.3.8)
@@ -305,7 +305,7 @@ GEM
     multi_json (1.15.0)
     multi_xml (0.6.0)
     mutex_m (0.2.0)
-    net-imap (0.4.7)
+    net-imap (0.4.8)
       date
       net-protocol
     net-pop (0.1.2)
@@ -339,7 +339,7 @@ GEM
       commonmarker (~> 0.17)
     openapi_parser (1.0.0)
     optimist (3.1.0)
-    parallel (1.23.0)
+    parallel (1.24.0)
     parser (3.2.2.4)
       ast (~> 2.4.1)
       racc
@@ -406,7 +406,7 @@ GEM
     rainbow (3.1.1)
     rake (12.3.3)
     rbtree (0.4.6)
-    rdoc (6.6.1)
+    rdoc (6.6.2)
       psych (>= 4.0.0)
     redis-client (0.19.0)
       connection_pool
@@ -458,10 +458,10 @@ GEM
       rubocop (~> 1.41)
     rubocop-factory_bot (2.24.0)
       rubocop (~> 1.33)
-    rubocop-performance (1.19.1)
-      rubocop (>= 1.7.0, < 2.0)
-      rubocop-ast (>= 0.4.0)
-    rubocop-rails (2.22.2)
+    rubocop-performance (1.20.0)
+      rubocop (>= 1.48.1, < 2.0)
+      rubocop-ast (>= 1.30.0, < 2.0)
+    rubocop-rails (2.23.0)
       activesupport (>= 4.2.0)
       rack (>= 1.1)
       rubocop (>= 1.33.0, < 2.0)
@@ -546,7 +546,7 @@ GEM
       tty-cursor (~> 0.7)
       tty-screen (~> 0.8)
       unicode-display_width (>= 1.6, < 3.0)
-    tty-screen (0.8.1)
+    tty-screen (0.8.2)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
     unf (0.1.4)
diff --git a/app/services/cocina/to_datacite/form.rb b/app/services/cocina/to_datacite/form.rb
index 456db8a44..46b0cc1cd 100644
--- a/app/services/cocina/to_datacite/form.rb
+++ b/app/services/cocina/to_datacite/form.rb
@@ -57,9 +57,9 @@ def self_deposit_type(cocina_self_deposit_form)
       end
 
       def self_deposit_subtypes(cocina_self_deposit_form)
-        cocina_self_deposit_form&.structuredValue&.map do |struct_val|
+        cocina_self_deposit_form&.structuredValue&.filter_map do |struct_val|
           struct_val.value if struct_val.type == 'subtype'
-        end&.compact
+        end
       end
 
       def self_deposit_form?(cocina_form)