diff --git a/Gemfile b/Gemfile
index 3be39e1..6cfc120 100644
--- a/Gemfile
+++ b/Gemfile
@@ -11,4 +11,4 @@ gem 'rspec', '~> 3.13'
 gem 'rubocop', require: false
 gem 'rubocop-rspec', '~> 3.5'
 
-gem 'tiktoken_ruby', '~> 0.0.9'
+gem 'tiktoken_ruby', '~> 0.0.11'
diff --git a/Gemfile.lock b/Gemfile.lock
index 0d11792..e51c209 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -69,9 +69,9 @@ GEM
       faraday (>= 1)
       faraday-multipart (>= 1)
     ruby-progressbar (1.13.0)
-    tiktoken_ruby (0.0.9-arm64-darwin)
-    tiktoken_ruby (0.0.9-x86_64-darwin)
-    tiktoken_ruby (0.0.9-x86_64-linux)
+    tiktoken_ruby (0.0.11.1-arm64-darwin)
+    tiktoken_ruby (0.0.11.1-x86_64-darwin)
+    tiktoken_ruby (0.0.11.1-x86_64-linux)
     tty-color (0.6.0)
     tty-cursor (0.7.1)
     tty-option (0.3.0)
@@ -100,7 +100,7 @@ DEPENDENCIES
   rubocop
   rubocop-rspec (~> 3.5)
   ruby-openai
-  tiktoken_ruby (~> 0.0.9)
+  tiktoken_ruby (~> 0.0.11)
   tty-option
   tty-prompt