diff --git a/backend/Gemfile.lock b/backend/Gemfile.lock
index d9ce716..ffb6367 100644
--- a/backend/Gemfile.lock
+++ b/backend/Gemfile.lock
@@ -112,7 +112,7 @@ GEM
     method_source (1.0.0)
     mimemagic (0.3.5)
     mini_mime (1.0.2)
-    mini_portile2 (2.4.0)
+    mini_portile2 (2.8.0)
     minitest (5.14.0)
     msgpack (1.3.3)
     msgpack (1.3.3-java)
@@ -120,13 +120,15 @@ GEM
     msgpack (1.3.3-x86-mingw32)
     nio4r (2.5.2)
     nio4r (2.5.2-java)
-    nokogiri (1.10.9)
-      mini_portile2 (~> 2.4.0)
-    nokogiri (1.10.9-java)
-    nokogiri (1.10.9-x64-mingw32)
-      mini_portile2 (~> 2.4.0)
-    nokogiri (1.10.9-x86-mingw32)
-      mini_portile2 (~> 2.4.0)
+    nokogiri (1.13.9)
+      mini_portile2 (~> 2.8.0)
+      racc (~> 1.4)
+    nokogiri (1.13.9-java)
+      racc (~> 1.4)
+    nokogiri (1.13.9-x64-mingw32)
+      racc (~> 1.4)
+    nokogiri (1.13.9-x86-mingw32)
+      racc (~> 1.4)
     pg (1.2.3)
     pg (1.2.3-x64-mingw32)
     pg (1.2.3-x86-mingw32)
@@ -135,6 +137,8 @@ GEM
       nio4r (~> 2.0)
     puma (4.3.3-java)
       nio4r (~> 2.0)
+    racc (1.6.0)
+    racc (1.6.0-java)
     rack (2.2.2)
     rack-cors (1.1.1)
       rack (>= 2.0.0)