diff --git a/spec/test_app/Gemfile.lock b/spec/test_app/Gemfile.lock
index c7e5660..fc6c60a 100644
--- a/spec/test_app/Gemfile.lock
+++ b/spec/test_app/Gemfile.lock
@@ -2,79 +2,86 @@ PATH
   remote: ../..
   specs:
     iban_bic (1.4.4)
-      rails (~> 6.1)
+      rails (>= 5.1)
       regexp-examples (~> 1.3)
 
 GEM
   remote: https://rubygems.org/
   specs:
-    actioncable (6.1.4.7)
-      actionpack (= 6.1.4.7)
-      activesupport (= 6.1.4.7)
+    actioncable (7.0.4.1)
+      actionpack (= 7.0.4.1)
+      activesupport (= 7.0.4.1)
       nio4r (~> 2.0)
       websocket-driver (>= 0.6.1)
-    actionmailbox (6.1.4.7)
-      actionpack (= 6.1.4.7)
-      activejob (= 6.1.4.7)
-      activerecord (= 6.1.4.7)
-      activestorage (= 6.1.4.7)
-      activesupport (= 6.1.4.7)
+    actionmailbox (7.0.4.1)
+      actionpack (= 7.0.4.1)
+      activejob (= 7.0.4.1)
+      activerecord (= 7.0.4.1)
+      activestorage (= 7.0.4.1)
+      activesupport (= 7.0.4.1)
       mail (>= 2.7.1)
-    actionmailer (6.1.4.7)
-      actionpack (= 6.1.4.7)
-      actionview (= 6.1.4.7)
-      activejob (= 6.1.4.7)
-      activesupport (= 6.1.4.7)
+      net-imap
+      net-pop
+      net-smtp
+    actionmailer (7.0.4.1)
+      actionpack (= 7.0.4.1)
+      actionview (= 7.0.4.1)
+      activejob (= 7.0.4.1)
+      activesupport (= 7.0.4.1)
       mail (~> 2.5, >= 2.5.4)
+      net-imap
+      net-pop
+      net-smtp
       rails-dom-testing (~> 2.0)
-    actionpack (6.1.4.7)
-      actionview (= 6.1.4.7)
-      activesupport (= 6.1.4.7)
-      rack (~> 2.0, >= 2.0.9)
+    actionpack (7.0.4.1)
+      actionview (= 7.0.4.1)
+      activesupport (= 7.0.4.1)
+      rack (~> 2.0, >= 2.2.0)
       rack-test (>= 0.6.3)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.2.0)
-    actiontext (6.1.4.7)
-      actionpack (= 6.1.4.7)
-      activerecord (= 6.1.4.7)
-      activestorage (= 6.1.4.7)
-      activesupport (= 6.1.4.7)
+    actiontext (7.0.4.1)
+      actionpack (= 7.0.4.1)
+      activerecord (= 7.0.4.1)
+      activestorage (= 7.0.4.1)
+      activesupport (= 7.0.4.1)
+      globalid (>= 0.6.0)
       nokogiri (>= 1.8.5)
-    actionview (6.1.4.7)
-      activesupport (= 6.1.4.7)
+    actionview (7.0.4.1)
+      activesupport (= 7.0.4.1)
       builder (~> 3.1)
       erubi (~> 1.4)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.1, >= 1.2.0)
-    activejob (6.1.4.7)
-      activesupport (= 6.1.4.7)
+    activejob (7.0.4.1)
+      activesupport (= 7.0.4.1)
       globalid (>= 0.3.6)
-    activemodel (6.1.4.7)
-      activesupport (= 6.1.4.7)
-    activerecord (6.1.4.7)
-      activemodel (= 6.1.4.7)
-      activesupport (= 6.1.4.7)
-    activestorage (6.1.4.7)
-      actionpack (= 6.1.4.7)
-      activejob (= 6.1.4.7)
-      activerecord (= 6.1.4.7)
-      activesupport (= 6.1.4.7)
-      marcel (~> 1.0.0)
+    activemodel (7.0.4.1)
+      activesupport (= 7.0.4.1)
+    activerecord (7.0.4.1)
+      activemodel (= 7.0.4.1)
+      activesupport (= 7.0.4.1)
+    activestorage (7.0.4.1)
+      actionpack (= 7.0.4.1)
+      activejob (= 7.0.4.1)
+      activerecord (= 7.0.4.1)
+      activesupport (= 7.0.4.1)
+      marcel (~> 1.0)
       mini_mime (>= 1.1.0)
-    activesupport (6.1.4.7)
+    activesupport (7.0.4.1)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 1.6, < 2)
       minitest (>= 5.1)
       tzinfo (~> 2.0)
-      zeitwerk (~> 2.3)
     builder (3.2.4)
     byebug (11.1.3)
-    concurrent-ruby (1.1.9)
+    concurrent-ruby (1.1.10)
     crass (1.0.6)
+    date (3.3.3)
     erubi (1.10.0)
     globalid (1.0.0)
       activesupport (>= 5.0)
-    i18n (1.10.0)
+    i18n (1.12.0)
       concurrent-ruby (~> 1.0)
     loofah (2.14.0)
       crass (~> 1.0.2)
@@ -85,7 +92,16 @@ GEM
     method_source (1.0.0)
     mini_mime (1.1.2)
     mini_portile2 (2.8.0)
-    minitest (5.15.0)
+    minitest (5.17.0)
+    net-imap (0.3.4)
+      date
+      net-protocol
+    net-pop (0.1.2)
+      net-protocol
+    net-protocol (0.2.1)
+      timeout
+    net-smtp (0.3.3)
+      net-protocol
     nio4r (2.5.8)
     nokogiri (1.13.3)
       mini_portile2 (~> 2.8.0)
@@ -94,52 +110,46 @@ GEM
     rack (2.2.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
-    rails (6.1.4.7)
-      actioncable (= 6.1.4.7)
-      actionmailbox (= 6.1.4.7)
-      actionmailer (= 6.1.4.7)
-      actionpack (= 6.1.4.7)
-      actiontext (= 6.1.4.7)
-      actionview (= 6.1.4.7)
-      activejob (= 6.1.4.7)
-      activemodel (= 6.1.4.7)
-      activerecord (= 6.1.4.7)
-      activestorage (= 6.1.4.7)
-      activesupport (= 6.1.4.7)
+    rails (7.0.4.1)
+      actioncable (= 7.0.4.1)
+      actionmailbox (= 7.0.4.1)
+      actionmailer (= 7.0.4.1)
+      actionpack (= 7.0.4.1)
+      actiontext (= 7.0.4.1)
+      actionview (= 7.0.4.1)
+      activejob (= 7.0.4.1)
+      activemodel (= 7.0.4.1)
+      activerecord (= 7.0.4.1)
+      activestorage (= 7.0.4.1)
+      activesupport (= 7.0.4.1)
       bundler (>= 1.15.0)
-      railties (= 6.1.4.7)
-      sprockets-rails (>= 2.0.0)
+      railties (= 7.0.4.1)
     rails-dom-testing (2.0.3)
       activesupport (>= 4.2.0)
       nokogiri (>= 1.6)
     rails-html-sanitizer (1.4.2)
       loofah (~> 2.3)
-    railties (6.1.4.7)
-      actionpack (= 6.1.4.7)
-      activesupport (= 6.1.4.7)
+    railties (7.0.4.1)
+      actionpack (= 7.0.4.1)
+      activesupport (= 7.0.4.1)
       method_source
-      rake (>= 0.13)
+      rake (>= 12.2)
       thor (~> 1.0)
+      zeitwerk (~> 2.5)
     rake (13.0.6)
     regexp-examples (1.5.1)
     rspec-core (3.10.1)
       rspec-support (~> 3.10.0)
     rspec-support (3.10.2)
-    sprockets (4.0.3)
-      concurrent-ruby (~> 1.0)
-      rack (> 1, < 3)
-    sprockets-rails (3.4.2)
-      actionpack (>= 5.2)
-      activesupport (>= 5.2)
-      sprockets (>= 3.0.0)
     sqlite3 (1.4.2)
     thor (1.2.1)
-    tzinfo (2.0.4)
+    timeout (0.3.1)
+    tzinfo (2.0.5)
       concurrent-ruby (~> 1.0)
     websocket-driver (0.7.5)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
-    zeitwerk (2.5.4)
+    zeitwerk (2.6.6)
 
 PLATFORMS
   ruby