diff --git a/Gemfile b/Gemfile
index 08a3cd4..b866197 100644
--- a/Gemfile
+++ b/Gemfile
@@ -21,6 +21,7 @@ group :optional do
   gem "webrick"
 end
 
+gem "bigdecimal"
 gem "simplecov"
 gem "yard"
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 2304922..da80954 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -9,6 +9,8 @@ GEM
     ast (2.4.2)
     backport (1.2.0)
     benchmark (0.4.0)
+    bigdecimal (3.1.8)
+    bigdecimal (3.1.8-java)
     coderay (1.1.3)
     date (3.4.1)
     date (3.4.1-java)
@@ -177,6 +179,7 @@ PLATFORMS
   arm64-darwin-21
   arm64-darwin-22
   arm64-darwin-23
+  arm64-darwin-24
   java
   universal-java-11
   universal-java-18
@@ -184,6 +187,7 @@ PLATFORMS
   x86_64-linux
 
 DEPENDENCIES
+  bigdecimal
   debug (>= 1.0.0)
   guard-rspec
   pry
@@ -205,4 +209,4 @@ DEPENDENCIES
   yard
 
 BUNDLED WITH
-   2.5.18
+   2.6.2