diff --git a/backend/Gemfile.lock b/backend/Gemfile.lock
index ba7c846..74d067f 100644
--- a/backend/Gemfile.lock
+++ b/backend/Gemfile.lock
@@ -92,14 +92,16 @@ GEM
     method_source (0.9.2)
     mimemagic (0.3.3)
     mini_mime (1.0.2)
-    mini_portile2 (2.4.0)
+    mini_portile2 (2.6.1)
     minitest (5.13.0)
     msgpack (1.3.1)
     nio4r (2.5.2)
-    nokogiri (1.10.7)
-      mini_portile2 (~> 2.4.0)
+    nokogiri (1.12.5)
+      mini_portile2 (~> 2.6.1)
+      racc (~> 1.4)
     puma (4.3.1)
       nio4r (~> 2.0)
+    racc (1.5.2)
     rack (2.0.8)
     rack-cors (1.1.0)
       rack (>= 2.0.0)