diff --git a/rails/strawpoll/Gemfile.lock b/rails/strawpoll/Gemfile.lock
index f8e4e24..cef203e 100644
--- a/rails/strawpoll/Gemfile.lock
+++ b/rails/strawpoll/Gemfile.lock
@@ -55,8 +55,8 @@ GEM
       minitest (~> 5.1)
       tzinfo (~> 1.1)
       zeitwerk (~> 1.3, >= 1.3.1)
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     archive-zip (0.12.0)
       io-like (~> 0.3.0)
     bindex (0.5.0)
@@ -101,7 +101,9 @@ GEM
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
     method_source (0.9.2)
-    mimemagic (0.3.3)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.1)
     mini_portile2 (2.4.0)
     minitest (5.11.3)
@@ -110,7 +112,7 @@ GEM
     nio4r (2.3.1)
     nokogiri (1.10.1)
       mini_portile2 (~> 2.4.0)
-    public_suffix (3.0.3)
+    public_suffix (5.0.0)
     puma (3.12.0)
     rack (2.0.6)
     rack-proxy (0.6.5)