diff --git a/Gemfile.lock b/Gemfile.lock
index 3ca1dfea4..9aa9ede1d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -158,7 +158,7 @@ GEM
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
     crass (1.0.6)
-    css_parser (1.6.0)
+    css_parser (1.7.1)
       addressable
     curb (0.9.10)
     daemons (1.3.1)
@@ -445,8 +445,8 @@ GEM
       addressable
       css_parser (>= 1.6.0)
       htmlentities (>= 4.0.0)
-    premailer-rails (1.10.2)
-      actionmailer (>= 3, < 6)
+    premailer-rails (1.10.3)
+      actionmailer (>= 3)
       premailer (~> 1.7, >= 1.7.9)
     promise.rb (0.7.4)
     pry (0.12.2)