diff --git a/Gemfile.lock b/Gemfile.lock
index 7e55fce..78a78f9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -52,15 +52,15 @@ GEM
       thor (>= 0.14, < 2.0)
     json (1.8.0)
     jwt (1.4.1)
-    mail (2.5.4)
+    mail (2.5.5)
       mime-types (~> 1.16)
       treetop (~> 1.4.8)
     method_source (0.8.1)
-    mime-types (1.23)
+    mime-types (1.25.1)
     minitest (4.7.5)
     multi_json (1.7.7)
     pg (0.15.1)
-    polyglot (0.3.3)
+    polyglot (0.3.5)
     pry (0.9.12.2)
       coderay (~> 1.0.5)
       method_source (~> 0.8)
@@ -114,7 +114,7 @@ GEM
     thread_safe (0.1.0)
       atomic
     tilt (1.4.1)
-    treetop (1.4.14)
+    treetop (1.4.15)
       polyglot
       polyglot (>= 0.3.1)
     turbolinks (1.2.0)