diff --git a/Gemfile.lock b/Gemfile.lock
index 8706aba..1dfaa99 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -241,7 +241,7 @@ GEM
     listen (3.5.1)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
-    loofah (2.15.0)
+    loofah (2.19.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     lti_provider_engine (1.2.0)
@@ -274,7 +274,7 @@ GEM
     mysql2 (0.5.3)
     nenv (0.3.0)
     nio4r (2.5.8)
-    nokogiri (1.13.3)
+    nokogiri (1.13.10)
       mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
     notiffany (0.1.3)
@@ -299,7 +299,7 @@ GEM
       coderay (~> 1.1)
       method_source (~> 1.0)
     public_suffix (4.0.6)
-    racc (1.6.0)
+    racc (1.6.1)
     rack (2.2.3)
     rack-protection (2.1.0)
       rack