diff --git a/ruby/ruby-euler/Gemfile.lock b/ruby/ruby-euler/Gemfile.lock
index e508a52..66441c6 100644
--- a/ruby/ruby-euler/Gemfile.lock
+++ b/ruby/ruby-euler/Gemfile.lock
@@ -14,7 +14,8 @@ GEM
     rainbow (3.1.1)
     rake (13.0.6)
     regexp_parser (2.8.0)
-    rexml (3.2.5)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rspec (3.12.0)
       rspec-core (~> 3.12.0)
       rspec-expectations (~> 3.12.0)
@@ -42,10 +43,12 @@ GEM
       parser (>= 3.2.1.0)
     ruby-progressbar (1.13.0)
     singleton (0.1.1)
+    strscan (3.1.0)
     unicode-display_width (2.4.2)
 
 PLATFORMS
   arm64-darwin-22
+  x86_64-linux
 
 DEPENDENCIES
   prime (~> 0.1)