diff --git a/project_backend/Gemfile.lock b/project_backend/Gemfile.lock
index 0d2f9f5..925e10b 100644
--- a/project_backend/Gemfile.lock
+++ b/project_backend/Gemfile.lock
@@ -100,7 +100,7 @@ GEM
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
       ruby_dep (~> 1.2)
-    loofah (2.5.0)
+    loofah (2.18.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.7.1)
@@ -108,21 +108,25 @@ GEM
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
     method_source (1.0.0)
-    mimemagic (0.3.4)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     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-x64-mingw32)
     mysql2 (0.5.3)
     mysql2 (0.5.3-x64-mingw32)
     nio4r (2.5.2)
-    nokogiri (1.10.9)
-      mini_portile2 (~> 2.4.0)
-    nokogiri (1.10.9-x64-mingw32)
-      mini_portile2 (~> 2.4.0)
+    nokogiri (1.13.6)
+      mini_portile2 (~> 2.8.0)
+      racc (~> 1.4)
+    nokogiri (1.13.6-x64-mingw32)
+      racc (~> 1.4)
     puma (4.3.3)
       nio4r (~> 2.0)
+    racc (1.6.0)
     rack (2.2.2)
     rack-cors (1.1.1)
       rack (>= 2.0.0)
@@ -146,7 +150,7 @@ GEM
     rails-dom-testing (2.0.3)
       activesupport (>= 4.2.0)
       nokogiri (>= 1.6)
-    rails-html-sanitizer (1.3.0)
+    rails-html-sanitizer (1.4.3)
       loofah (~> 2.3)
     railties (6.0.2.2)
       actionpack (= 6.0.2.2)