diff --git a/Gemfile.lock b/Gemfile.lock
index 1e3e150b..804fe4c6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    bolognese (2.1.1)
+    bolognese (2.2.0)
       activesupport (>= 4.2.5)
       benchmark_methods (~> 0.7)
       bibtex-ruby (>= 5.1.0)
@@ -16,9 +16,9 @@ PATH
       json-ld-preloaded (~> 3.1, >= 3.1.3)
       jsonlint (~> 0.3.0)
       loofah (~> 2.0, >= 2.0.3)
-      maremma (>= 4.9.4, < 5)
+      maremma (~> 5.0)
       namae (~> 1.0)
-      nokogiri (>= 1.13.2, < 1.14)
+      nokogiri (~> 1.16, >= 1.16.2)
       oj (~> 3.10)
       oj_mimic_json (~> 1.0, >= 1.0.1)
       postrank-uri (~> 1.0, >= 1.0.18)
@@ -114,7 +114,7 @@ GEM
     loofah (2.21.3)
       crass (~> 1.0.2)
       nokogiri (>= 1.12.0)
-    maremma (4.9.9)
+    maremma (5.0.0)
       activesupport (>= 4.2.5)
       addressable (>= 2.3.6)
       builder (~> 3.2, >= 3.2.2)
@@ -125,17 +125,17 @@ GEM
       faraday-follow_redirects (~> 0.3.0)
       faraday-gzip (~> 0.1.0)
       faraday-multipart (~> 1.0.4)
-      nokogiri (>= 1.13.1, < 1.14.0)
+      nokogiri (~> 1.16, >= 1.16.2)
       oj (>= 2.8.3)
       oj_mimic_json (~> 1.0, >= 1.0.1)
     matrix (0.4.2)
-    mini_portile2 (2.8.0)
+    mini_portile2 (2.8.5)
     minitest (5.18.0)
     multi_json (1.15.0)
     multipart-post (2.3.0)
     namae (1.1.1)
-    nokogiri (1.13.9)
-      mini_portile2 (~> 2.8.0)
+    nokogiri (1.16.2)
+      mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
     oj (3.14.2)
     oj_mimic_json (1.0.1)
@@ -235,4 +235,4 @@ DEPENDENCIES
   webmock (~> 3.0, >= 3.0.1)
 
 BUNDLED WITH
-   2.4.22
+   2.5.5
diff --git a/bolognese.gemspec b/bolognese.gemspec
index 073f883d..4ea58d6b 100644
--- a/bolognese.gemspec
+++ b/bolognese.gemspec
@@ -16,9 +16,10 @@ Gem::Specification.new do |s|
   s.required_ruby_version = ['>=2.3']
 
   # Declare dependencies here, rather than in the Gemfile
-  s.add_dependency 'maremma', '>= 4.9.4', '< 5'
+  s.add_dependency 'maremma', '~> 5.0'
   #s.add_dependency 'faraday', '~> 0.17.3'
-  s.add_dependency 'nokogiri', '>= 1.13.2', '< 1.14'
+  # s.add_dependency 'nokogiri', '>= 1.13.2', '< 1.14'
+  s.add_dependency 'nokogiri', '~> 1.16', '>= 1.16.2'
   s.add_dependency 'loofah', '~> 2.0', '>= 2.0.3'
   s.add_dependency 'builder', '~> 3.2', '>= 3.2.2'
   s.add_dependency 'activesupport', '>= 4.2.5'
diff --git a/lib/bolognese/version.rb b/lib/bolognese/version.rb
index 5afd313f..a91a75e9 100644
--- a/lib/bolognese/version.rb
+++ b/lib/bolognese/version.rb
@@ -1,3 +1,3 @@
 module Bolognese
-  VERSION = "2.1.1"
+  VERSION = "2.2.0"
 end