diff --git a/site/Gemfile b/site/Gemfile
index a3551b15..11304501 100644
--- a/site/Gemfile
+++ b/site/Gemfile
@@ -19,7 +19,7 @@ end
 
 gem 'json'
 gem "bootswatch", github: "thomaspark/bootswatch", tag: "v5.3.3"
-gem "bootstrap", "~> 5.3.3"
+gem "bootstrap", "~> 5.3.5"
 
 # Windows and JRuby does not include zoneinfo files, so bundle the tzinfo-data gem
 # and associated library.
diff --git a/site/Gemfile.lock b/site/Gemfile.lock
index b5a5592a..eb752ec6 100644
--- a/site/Gemfile.lock
+++ b/site/Gemfile.lock
@@ -10,10 +10,7 @@ GEM
   specs:
     addressable (2.8.6)
       public_suffix (>= 2.0.2, < 6.0)
-    autoprefixer-rails (10.4.19.0)
-      execjs (~> 2)
-    bootstrap (5.3.3)
-      autoprefixer-rails (>= 9.1.0)
+    bootstrap (5.3.5)
       popper_js (>= 2.11.8, < 3)
     colorator (1.1.0)
     concurrent-ruby (1.2.3)
@@ -21,7 +18,6 @@ GEM
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0)
     eventmachine (1.2.7)
-    execjs (2.10.0)
     faraday (2.9.0)
       faraday-net_http (>= 2.0, < 3.2)
     faraday-net_http (3.1.0)
@@ -141,7 +137,7 @@ PLATFORMS
   x86_64-linux-musl
 
 DEPENDENCIES
-  bootstrap (~> 5.3.3)
+  bootstrap (~> 5.3.5)
   bootswatch!
   http_parser.rb (~> 0.6.0)
   jekyll (~> 4.3)