diff --git a/site/Gemfile b/site/Gemfile
index d9ea5b6..d82b988 100644
--- a/site/Gemfile
+++ b/site/Gemfile
@@ -19,7 +19,7 @@ end
 
 gem 'json'
 gem "bootswatch", github: "thomaspark/bootswatch", tag: "v5.3.8"
-gem "bootstrap", "~> 5.3.5"
+gem "bootstrap", "~> 5.3.8"
 
 # pinned version of dependency of jekyll-sass-converter, as it emits deprecation warnings until
 # bootstrap v5.5.0 - see https://github.com/OpenTabletDriver/opentabletdriver.github.io/issues/212
diff --git a/site/Gemfile.lock b/site/Gemfile.lock
index e73b030..88e60fc 100644
--- a/site/Gemfile.lock
+++ b/site/Gemfile.lock
@@ -12,7 +12,7 @@ GEM
       public_suffix (>= 2.0.2, < 7.0)
     base64 (0.3.0)
     bigdecimal (3.2.2)
-    bootstrap (5.3.5)
+    bootstrap (5.3.8)
       popper_js (>= 2.11.8, < 3)
     colorator (1.1.0)
     concurrent-ruby (1.3.5)
@@ -159,7 +159,7 @@ PLATFORMS
   x86_64-linux-musl
 
 DEPENDENCIES
-  bootstrap (~> 5.3.5)
+  bootstrap (~> 5.3.8)
   bootswatch!
   http_parser.rb (~> 0.6.0)
   jekyll (~> 4.3)