diff --git a/Gemfile.lock b/Gemfile.lock
index e4523d102..cd638f1c1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -55,21 +55,21 @@ GEM
     api-pagination (4.8.1)
     arel (9.0.0)
     aws-eventstream (1.0.1)
-    aws-partitions (1.102.0)
-    aws-sdk-core (3.26.0)
+    aws-partitions (1.103.0)
+    aws-sdk-core (3.27.0)
       aws-eventstream (~> 1.0)
       aws-partitions (~> 1.0)
       aws-sigv4 (~> 1.0)
       jmespath (~> 1.0)
-    aws-sdk-kms (1.8.0)
-      aws-sdk-core (~> 3)
+    aws-sdk-kms (1.9.0)
+      aws-sdk-core (~> 3, >= 3.26.0)
       aws-sigv4 (~> 1.0)
-    aws-sdk-s3 (1.18.0)
-      aws-sdk-core (~> 3, >= 3.21.2)
+    aws-sdk-s3 (1.19.0)
+      aws-sdk-core (~> 3, >= 3.26.0)
       aws-sdk-kms (~> 1)
       aws-sigv4 (~> 1.0)
-    aws-sdk-sqs (1.5.0)
-      aws-sdk-core (~> 3)
+    aws-sdk-sqs (1.6.0)
+      aws-sdk-core (~> 3, >= 3.26.0)
       aws-sigv4 (~> 1.0)
     aws-sigv4 (1.0.3)
     base32-url (0.5)
@@ -93,7 +93,7 @@ GEM
       latex-decode (~> 0.0)
     binding_of_caller (0.8.0)
       debug_inspector (>= 0.0.1)
-    bolognese (0.13.6)
+    bolognese (0.14.1)
       activesupport (>= 4.2.5, < 6)
       benchmark_methods (~> 0.7)
       bibtex-ruby (~> 4.1)
@@ -132,7 +132,7 @@ GEM
       simplecov (<= 0.13)
     coderay (1.1.2)
     colorize (0.8.1)
-    commonmarker (0.17.11)
+    commonmarker (0.17.12)
       ruby-enum (~> 0.5)
     concurrent-ruby (1.0.5)
     countries (2.1.4)
@@ -181,10 +181,10 @@ GEM
     erubi (1.7.1)
     excon (0.62.0)
     facets (3.1.0)
-    factory_bot (4.11.0)
+    factory_bot (4.11.1)
       activesupport (>= 3.0.0)
-    factory_bot_rails (4.11.0)
-      factory_bot (~> 4.11.0)
+    factory_bot_rails (4.11.1)
+      factory_bot (~> 4.11.1)
       railties (>= 3.0.0)
     faker (1.9.1)
       i18n (>= 0.7)
diff --git a/spec/fixtures/files/schema_4.0.xml b/spec/fixtures/files/schema_4.0.xml
new file mode 100644
index 000000000..22c567409
--- /dev/null
+++ b/spec/fixtures/files/schema_4.0.xml
@@ -0,0 +1,140 @@
+<?xml version="1.0" ?>
+<resource xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://datacite.org/schema/kernel-4" xsi:schemaLocation="http://datacite.org/schema/kernel-4 http://schema.datacite.org/meta/kernel-4/metadata.xsd">
+  <identifier identifierType="DOI">10.6071/Z7WC73</identifier>
+  <creators>
+    <creator>
+      <creatorName>Bales, Roger</creatorName>
+      <affiliation>UC Merced</affiliation>
+    </creator>
+    <creator>
+      <creatorName>Meadows, Matt</creatorName>
+      <affiliation>UC Merced</affiliation>
+    </creator>
+    <creator>
+      <creatorName>Stacy, Erin</creatorName>
+      <nameIdentifier nameIdentifierScheme="ORCID" schemeURI="http://orcid.org/">0000-0002-8862-1404</nameIdentifier>
+      <affiliation>UC Merced</affiliation>
+    </creator>
+    <creator>
+      <creatorName>Conklin, Martha</creatorName>
+      <nameIdentifier nameIdentifierScheme="ORCID" schemeURI="http://orcid.org/">0000-0002-9627-2427</nameIdentifier>
+      <affiliation>UC Merced</affiliation>
+    </creator>
+    <creator>
+      <creatorName>Meng, Xiande</creatorName>
+      <affiliation>UC Merced</affiliation>
+    </creator>
+    <creator>
+      <creatorName>Southern Sierra Critical Zone Observatory, SSCZO</creatorName>
+      <affiliation>NSF</affiliation>
+    </creator>
+  </creators>
+  <titles>
+    <title>
+      Southern Sierra Critical Zone Observatory (SSCZO), Providence Creek
+      meteorological data, soil moisture and temperature, snow depth and air
+      temperature
+    </title>
+  </titles>
+  <publisher>UC Merced</publisher>
+  <publicationYear>2013</publicationYear>
+  <subjects>
+    <subject>Earth sciences</subject>
+    <subject>soil moisture</subject>
+    <subject>soil temperature</subject>
+    <subject>snow depth</subject>
+    <subject>air temperature</subject>
+    <subject>water balance</subject>
+    <subject>Nevada, Sierra (mountain range)</subject>
+  </subjects>
+  <fundingReferences>
+    <fundingReference>
+      <funderName>
+        National Science Foundation, Division of Earth Sciences, Critical Zone
+        Observatories
+      </funderName>
+      <awardNumber>1331939, 0725097</awardNumber>
+    </fundingReference>
+  </fundingReferences>
+  <contributors>
+    <contributor contributorType="ProjectLeader">
+      <contributorName>Bales, Roger</contributorName>
+      <affiliation>University of California, Merced</affiliation>
+    </contributor>
+    <contributor contributorType="DataCollector">
+      <contributorName>Meadows, Matt</contributorName>
+      <affiliation>University of California, Merced</affiliation>
+    </contributor>
+    <contributor contributorType="DataManager">
+      <contributorName>Meng, Xiande</contributorName>
+      <affiliation>University of California, Merced</affiliation>
+    </contributor>
+    <contributor contributorType="ResearchGroup">
+      <contributorName>Southern Sierra Critical Zone Observatory</contributorName>
+    </contributor>
+  </contributors>
+  <dates>
+    <date dateType="Updated">2014-10-17</date>
+    <date dateType="Available">2016-03-14T17:02:02Z</date>
+  </dates>
+  <language>en</language>
+  <resourceType resourceTypeGeneral="Dataset">dataset</resourceType>
+  <sizes>
+    <size>1799269709 bytes</size>
+  </sizes>
+  <version>2</version>
+  <rightsList>
+    <rights rightsURI="https://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution 4.0 International (CC BY 4.0)</rights>
+  </rightsList>
+  <descriptions>
+    <description descriptionType="Abstract">
+      Snow depth, soil moisture and soil temperature are measured at lower
+      Providence South facing (LowMetS) and North facing (LowMetN), Upper
+      Providence South facing (UpMetS), North facing (UpMetN) and Flat aspect
+      (UpMetF), and Subcatchment basin P301 (P301) with a wireless sensor
+      network, using a Campbell Scientific logger to control peripheral devices.
+      Snow depth is measured in the open, at the drip edge and under canopies.
+      Soil moisture and temperature are measured at 10, 30, 60 and 90 cm depths
+      coincident with the snow depth nodes. 10 watt solar panels provides power
+      for monitoring at 10 minute intervals. Raw data have been processed to
+      level 1 (QA/QC) and level 2 (gap-filled, derived) data. Time period: water
+      year 2008 through water year 2012 (version 1), 2013 to 2016 (version 2).
+    </description>
+    <description descriptionType="Methods">
+      Soil volumetric water content (VWC) and soil temperature measured using
+      Decagon Devices ECHO-TM at depths of 10, 30, 60, an 90 cm below the
+      mineral soil surface. Sensor now equivalent to 5TM
+      (http://www.decagon.com/soil-moisture-sensors/). Distance to snow/soil
+      surface and air temperature measured with Judd Communications ultrasonic
+      depth sensor, using analog control ( http://www.juddcom.com/ ). Data
+      control and storage on Campbell Scientific CR1000 datalogger, using
+      AM16/32B multiplexer ( http://www.campbellsci.com ). Program for data
+      acquisition are located on UC Merced-SNRI digital library (
+      https://eng.ucmerced.edu/snsjho/files/MHWG/Field/Southern...)
+    </description>
+    <description descriptionType="Other">
+      Lower and upper Providence Creek, Subcatchment basin P301.acde: white fir
+      drip edge; acuc: white fir under canopy; cdde: incense-cedar drip edge;
+      cduc: incense-cedar under canopy; open: open canopy; plde: sugar pine drip
+      edge; pluc: sugar pine under canopy; ppde: Ponderosa pine drip; edge ppde:
+      Ponderosa pine drip edge; ppuc: Ponderosa pine under canopy; ppuc:
+      Ponderosa pine under canopy; qkde: black oak drip edge; qkuc: black oak
+      under canopy
+    </description>
+  </descriptions>
+  <geoLocations>
+    <geoLocation>
+      <geoLocationPoint>
+        <pointLatitude>37.047756</pointLatitude>
+        <pointLongitude>-119.221094</pointLongitude>
+      </geoLocationPoint>
+      <geoLocationBox>
+        <westBoundLongitude>-119.211</westBoundLongitude>
+        <eastBoundLongitude>-119.182</eastBoundLongitude>
+        <southBoundLatitude>37.046</southBoundLatitude>
+        <northBoundLatitude>37.075</northBoundLatitude>
+      </geoLocationBox>
+      <geoLocationPlace>Providence Creek (Lower, Upper and P301)</geoLocationPlace>
+    </geoLocation>
+  </geoLocations>
+</resource>
\ No newline at end of file
diff --git a/spec/requests/dois_spec.rb b/spec/requests/dois_spec.rb
index 7fd44bbe7..af6e9b1ea 100644
--- a/spec/requests/dois_spec.rb
+++ b/spec/requests/dois_spec.rb
@@ -738,6 +738,47 @@
       end
     end
 
+    context 'when the request uses schema 4.0' do
+      let(:xml) { Base64.strict_encode64(file_fixture('schema_4.0.xml').read) }
+      let(:valid_attributes) do
+        {
+          "data" => {
+            "type" => "dois",
+            "attributes" => {
+              "doi" => "10.14454/10703",
+              "url" => "http://www.bl.uk/pdf/patspec.pdf",
+              "xml" => xml,
+              "event" => "register"
+            },
+            "relationships"=> {
+              "client"=>  {
+                "data"=> {
+                  "type"=> "clients",
+                  "id"=> client.symbol.downcase
+                }
+              }
+            }
+          }
+        }
+      end
+
+      before { post '/dois', params: valid_attributes.to_json, headers: headers }
+
+      it 'creates a Doi' do
+        expect(json.dig('data', 'attributes', 'doi')).to eq("10.14454/10703")
+        expect(json.dig('data', 'attributes', 'title')).to eq("Southern Sierra Critical Zone Observatory (SSCZO), Providence Creek\n      meteorological data, soil moisture and temperature, snow depth and air\n      temperature")
+        expect(json.dig('data', 'attributes', 'schema-version')).to eq("http://datacite.org/schema/kernel-4")
+      end
+
+      it 'returns status code 201' do
+        expect(response).to have_http_status(201)
+      end
+
+      it 'sets state to registered' do
+        expect(json.dig('data', 'attributes', 'state')).to eq("registered")
+      end
+    end
+
     context 'when the request uses namespaced xml and the title changes' do
       let(:title) { "Referee report. For: RESEARCH-3482 [version 5; referees: 1 approved, 1 approved with reservations]" }
       let(:xml) { Base64.strict_encode64(file_fixture('ns0.xml').read) }