diff --git a/Gemfile.lock b/Gemfile.lock
index 57d4c2c..55555dd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -84,14 +84,15 @@ GEM
       sparql (~> 3.0)
       sparql-client (~> 3.0)
     mini_mime (0.1.4)
-    mini_portile2 (2.4.0)
+    mini_portile2 (2.8.0)
     minitest (5.10.3)
     multi_json (1.13.1)
     mustermann (1.0.3)
     net-http-persistent (3.0.0)
       connection_pool (~> 2.2)
-    nokogiri (1.10.4)
-      mini_portile2 (~> 2.4.0)
+    nokogiri (1.13.4)
+      mini_portile2 (~> 2.8.0)
+      racc (~> 1.4)
     parslet (1.8.1)
     poltergeist (1.16.0)
       capybara (~> 2.1)
@@ -99,6 +100,7 @@ GEM
       websocket-driver (>= 0.2.0)
     public_suffix (3.0.0)
     puma (3.10.0)
+    racc (1.6.0)
     rack (2.0.7)
     rack-cache (1.7.1)
       rack (>= 0.4)