diff --git a/Gemfile b/Gemfile
index 81c04a742..81f660188 100644
--- a/Gemfile
+++ b/Gemfile
@@ -12,8 +12,7 @@ gem "aws-sdk-sqs", "~> 1.3"
 gem "base32-url", "~> 0.3"
 gem "batch-loader", "~> 1.4", ">= 1.4.1"
 gem "bcrypt", "~> 3.1.7"
-# gem "bolognese", "~> 1.11.5"
-gem "bolognese", git: "https://github.com/datacite/bolognese", branch: "schema-4.5"
+gem "bolognese", "~> 2.0.0"
 gem "bootsnap", "~> 1.4", ">= 1.4.4", require: false
 gem "cancancan", "~> 3.0"
 gem "commonmarker", "~> 0.23.4"
diff --git a/Gemfile.lock b/Gemfile.lock
index 2ce4f4683..040c625be 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,33 +1,3 @@
-GIT
-  remote: https://github.com/datacite/bolognese
-  revision: 98870f13479ef266a4b773e5295958886252a5a8
-  branch: schema-4.5
-  specs:
-    bolognese (1.11.5)
-      activesupport (>= 4.2.5)
-      benchmark_methods (~> 0.7)
-      bibtex-ruby (>= 5.1.0)
-      builder (~> 3.2, >= 3.2.2)
-      citeproc-ruby (~> 1.1, >= 1.1.12)
-      colorize (~> 0.8.1)
-      concurrent-ruby (~> 1.1, >= 1.1.5)
-      csl-styles (~> 1.0, >= 1.0.1.10)
-      edtf (~> 3.0, >= 3.0.4)
-      gender_detector (~> 0.1.2)
-      iso8601 (~> 0.9.1)
-      json-ld-preloaded (~> 3.1, >= 3.1.3)
-      jsonlint (~> 0.3.0)
-      loofah (~> 2.0, >= 2.0.3)
-      maremma (>= 4.9.4, < 5)
-      namae (~> 1.0)
-      nokogiri (>= 1.13.2, < 1.14)
-      oj (~> 3.10)
-      oj_mimic_json (~> 1.0, >= 1.0.1)
-      postrank-uri (~> 1.0, >= 1.0.18)
-      rdf-rdfxml (~> 3.1)
-      rdf-turtle (~> 3.1)
-      thor (>= 0.19)
-
 GEM
   remote: https://rubygems.org/
   specs:
@@ -143,6 +113,30 @@ GEM
       latex-decode (~> 0.0)
     binding_of_caller (1.0.0)
       debug_inspector (>= 0.0.1)
+    bolognese (2.0.0)
+      activesupport (>= 4.2.5)
+      benchmark_methods (~> 0.7)
+      bibtex-ruby (>= 5.1.0)
+      builder (~> 3.2, >= 3.2.2)
+      citeproc-ruby (~> 1.1, >= 1.1.12)
+      colorize (~> 0.8.1)
+      concurrent-ruby (~> 1.1, >= 1.1.5)
+      csl-styles (~> 1.0, >= 1.0.1.10)
+      edtf (~> 3.0, >= 3.0.4)
+      gender_detector (~> 0.1.2)
+      iso8601 (~> 0.9.1)
+      json-ld-preloaded (~> 3.1, >= 3.1.3)
+      jsonlint (~> 0.3.0)
+      loofah (~> 2.0, >= 2.0.3)
+      maremma (>= 4.9.4, < 5)
+      namae (~> 1.0)
+      nokogiri (>= 1.13.2, < 1.14)
+      oj (~> 3.10)
+      oj_mimic_json (~> 1.0, >= 1.0.1)
+      postrank-uri (~> 1.0, >= 1.0.18)
+      rdf-rdfxml (~> 3.1)
+      rdf-turtle (~> 3.1)
+      thor (>= 0.19)
     bootsnap (1.15.0)
       msgpack (~> 1.2)
     builder (3.2.4)
@@ -662,7 +656,7 @@ DEPENDENCIES
   bcrypt (~> 3.1.7)
   better_errors
   binding_of_caller
-  bolognese!
+  bolognese (~> 2.0.0)
   bootsnap (~> 1.4, >= 1.4.4)
   bullet (~> 6.1)
   byebug
diff --git a/app/graphql/types/doi_item.rb b/app/graphql/types/doi_item.rb
index 468a63a4b..6e2fdf89e 100644
--- a/app/graphql/types/doi_item.rb
+++ b/app/graphql/types/doi_item.rb
@@ -920,7 +920,7 @@ def citeproc_hsh
       "volume" => object.container.to_h["volume"],
       "issue" => object.container.to_h["issue"],
       "page" => page,
-      "publisher" => object.publisher["name"] || object.publisher,
+      "publisher" => (object.publisher.is_a?(Hash) ? object.publisher&.fetch("name", nil) : object.publisher),
       "title" => parse_attributes(object.titles, content: "title", first: true),
       "URL" => object.url,
       "version" => object.version_info,