diff --git a/Gemfile b/Gemfile
index 5efc15387..06d11179d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -102,7 +102,7 @@ gem 'lograge'
 
 gem 'zk'
 
-gem 'mods', '~> 2.1'
+gem 'mods', '~> 2.4'
 gem 'riiif', '~> 1.1'
 
 gem 'iiif_manifest', '~> 0.5.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index d12c6ecd1..fb47882b4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -239,6 +239,8 @@ GEM
     ebnf (1.1.2)
       rdf (>= 2.2, < 4.0)
       sxp (~> 1.0)
+    edtf (3.0.4)
+      activesupport (>= 3.0, < 6.0)
     equivalent-xml (0.6.0)
       nokogiri (>= 1.4.3)
     erubi (1.7.1)
@@ -520,10 +522,11 @@ GEM
     mini_mime (1.0.0)
     mini_portile2 (2.4.0)
     minitest (5.11.3)
-    mods (2.1.0)
+    mods (2.4.1)
+      edtf
       iso-639
-      nokogiri
-      nom-xml (~> 0.6.0)
+      nokogiri (>= 1.6.6)
+      nom-xml (~> 1.0)
     multi_json (1.13.1)
     multi_xml (0.6.0)
     multipart-post (2.0.0)
@@ -538,7 +541,7 @@ GEM
       noid (~> 0.9)
     nokogiri (1.10.1)
       mini_portile2 (~> 2.4.0)
-    nom-xml (0.6.0)
+    nom-xml (1.1.0)
       activesupport (>= 3.2.18)
       i18n
       nokogiri
@@ -925,7 +928,7 @@ DEPENDENCIES
   jquery-rails
   listen (>= 3.0.5, < 3.2)
   lograge
-  mods (~> 2.1)
+  mods (~> 2.4)
   peek
   peek-faraday
   peek-git
@@ -961,4 +964,4 @@ DEPENDENCIES
   zk
 
 BUNDLED WITH
-   1.17.3
+   1.16.6