diff --git a/Gemfile.lock b/Gemfile.lock
index 0aa80d5..fc901ec 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -8,7 +8,7 @@ GEM
       tzinfo (~> 1.1)
     addressable (2.6.0)
       public_suffix (>= 2.0.2, < 4.0)
-    autoprefixer-rails (7.1.1.2)
+    autoprefixer-rails (9.4.7)
       execjs
     backports (3.11.4)
     coderay (1.1.2)
@@ -50,8 +50,8 @@ GEM
       kramdown (~> 1.2)
       middleman-cli (= 4.3.2)
       middleman-core (= 4.3.2)
-    middleman-autoprefixer (2.8.0)
-      autoprefixer-rails (>= 7.0.1, < 8.0.0)
+    middleman-autoprefixer (2.10.0)
+      autoprefixer-rails (>= 9.1.4)
       middleman-core (>= 3.3.3)
     middleman-blog (4.0.3)
       addressable (~> 2.3)