diff --git a/docs/Gemfile b/docs/Gemfile
index a01dbe4c..6a0e47f0 100644
--- a/docs/Gemfile
+++ b/docs/Gemfile
@@ -1,7 +1,7 @@
 source "https://rubygems.org"
 # Ruby 4.0+ bundles some stdlib as gems; Jekyll 3 / Liquid / safe_yaml still require them.
 gem "base64"
-gem "bigdecimal"
+gem "bigdecimal", '>= 4.1.3'
 gem "jekyll", "~> 3.9"
 gem "kramdown-parser-gfm"
 gem "jekyll-relative-links"
diff --git a/docs/Gemfile.lock b/docs/Gemfile.lock
index f79d99a2..bc0ebeca 100644
--- a/docs/Gemfile.lock
+++ b/docs/Gemfile.lock
@@ -4,7 +4,7 @@ GEM
     addressable (2.8.9)
       public_suffix (>= 2.0.2, < 8.0)
     base64 (0.3.0)
-    bigdecimal (4.1.2)
+    bigdecimal (4.1.3)
     colorator (1.1.0)
     concurrent-ruby (1.3.8)
     csv (3.3.5)