diff --git a/config/routes.rb b/config/routes.rb
index d8b5962c..334e1c1c 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -217,12 +217,12 @@
   # Journal names routinely contain periods (e.g. "Cryptogamie. Algologie"),
   # which Rails' default segment matcher excludes to leave room for format
   # detection (":journal.json"), so it silently truncates them instead.
-  # Constrain :journal to swallow everything but a real trailing ".json"/
-  # ".html", so a literal period in the name is matched as part of :journal
-  # while an actual format suffix is still recognized.
+  # Journal names can also contain slashes. Constrain :journal to swallow
+  # everything but a real trailing ".json"/".html", so literal punctuation
+  # is matched as part of :journal while a format suffix is still recognized.
   resources(
     :journals, only: %i[index show], param: :journal,
-    constraints: { journal: /[^\/]+?/, format: /json|html/ }
+    constraints: { journal: /.+?/, format: /json|html/ }
   )
 
   # Publications
diff --git a/test/controllers/journals_controller_test.rb b/test/controllers/journals_controller_test.rb
index bbf5f6c3..9a61b8b8 100644
--- a/test/controllers/journals_controller_test.rb
+++ b/test/controllers/journals_controller_test.rb
@@ -1,6 +1,15 @@
 require 'test_helper'
 
 class JournalsControllerTest < ActionDispatch::IntegrationTest
+  test 'journal names with slashes generate links and resolve to the full name' do
+    journal = "Annales de l'Institut Pasteur / Microbiologie"
+
+    path = journal_path(journal)
+    get(path)
+    assert_response :success
+    assert_equal journal, @request.params[:journal]
+  end
+
   test 'show resolves a journal name with an embedded period, untruncated' do
     get('/journals/' + ERB::Util.url_encode('Cryptogamie. Algologie'))
     assert_response :success