diff --git a/Gemfile b/Gemfile
index a7dabdd..cc39707 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,7 +6,7 @@ source "https://rubygems.org"
 
 gem "activerecord",    "~> 6.0"
 gem "deep_merge",      "~> 1.2"
-gem "nokogiri",        "~> 1.10"
+gem "nokogiri",        "~> 1.12"
 gem "parallel",        "~> 1.19"
 gem "pg",              "~> 1.2"
 gem "rdf-turtle",      "~> 3.0"
diff --git a/Gemfile.lock b/Gemfile.lock
index 3c5aa68..292be72 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -16,7 +16,7 @@ GEM
       public_suffix (>= 2.0.2, < 5.0)
     amazing_print (1.3.0)
     coderay (1.1.3)
-    concurrent-ruby (1.1.8)
+    concurrent-ruby (1.1.9)
     crack (0.4.5)
       rexml
     deep_merge (1.2.1)
@@ -36,10 +36,10 @@ GEM
       concurrent-ruby (~> 1.0)
     link_header (0.0.8)
     method_source (1.0.0)
-    mini_portile2 (2.5.3)
+    mini_portile2 (2.6.1)
     minitest (5.14.4)
-    nokogiri (1.11.7)
-      mini_portile2 (~> 2.5.0)
+    nokogiri (1.12.5)
+      mini_portile2 (~> 2.6.1)
       racc (~> 1.4)
     parallel (1.20.1)
     pg (1.2.3)
@@ -48,7 +48,7 @@ GEM
       method_source (~> 1.0)
     public_suffix (4.0.6)
     racc (1.5.2)
-    rdf (3.1.14)
+    rdf (3.1.15)
       hamster (~> 3.0)
       link_header (~> 0.0, >= 0.0.8)
     rdf-turtle (3.1.3)
@@ -94,7 +94,7 @@ PLATFORMS
 DEPENDENCIES
   activerecord (~> 6.0)
   deep_merge (~> 1.2)
-  nokogiri (~> 1.10)
+  nokogiri (~> 1.12)
   parallel (~> 1.19)
   pg (~> 1.2)
   pry (~> 0.12)