diff --git a/backend/Gemfile.lock b/backend/Gemfile.lock
index 3d5bc0f61..9039fc91b 100644
--- a/backend/Gemfile.lock
+++ b/backend/Gemfile.lock
@@ -151,7 +151,7 @@ GEM
       mini_mime (>= 0.1.1)
     method_source (0.9.2)
     mini_mime (1.0.1)
-    mini_portile2 (2.4.0)
+    mini_portile2 (2.5.1)
     minitest (5.14.2)
     multi_json (1.15.0)
     multipart-post (2.1.1)
@@ -160,13 +160,15 @@ GEM
     net-ssh (6.1.0)
     nio4r (2.3.1)
     nio4r (2.3.1-java)
-    nokogiri (1.10.1)
-      mini_portile2 (~> 2.4.0)
-    nokogiri (1.10.1-java)
-    nokogiri (1.10.1-x64-mingw32)
-      mini_portile2 (~> 2.4.0)
-    nokogiri (1.10.1-x86-mingw32)
-      mini_portile2 (~> 2.4.0)
+    nokogiri (1.11.4)
+      mini_portile2 (~> 2.5.0)
+      racc (~> 1.4)
+    nokogiri (1.11.4-java)
+      racc (~> 1.4)
+    nokogiri (1.11.4-x64-mingw32)
+      racc (~> 1.4)
+    nokogiri (1.11.4-x86-mingw32)
+      racc (~> 1.4)
     paper_trail (10.1.0)
       activerecord (>= 4.2, < 6.0)
       request_store (~> 1.1)
@@ -189,6 +191,8 @@ GEM
     public_suffix (4.0.6)
     puma (3.12.0)
     puma (3.12.0-java)
+    racc (1.5.2)
+    racc (1.5.2-java)
     rack (2.0.6)
     rack-cors (1.0.2)
     rack-protection (2.0.5)