diff --git a/Gemfile b/Gemfile
index 5719790d..887f9485 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,7 +7,7 @@
 
 source "http://rubygems.org/"
 
-gem "bundler"
+gem "bundler", "~> 2.5"
 gem "rake"
 gem "rspec", "~> 3.8"
 gem "require_all"
diff --git a/Gemfile.lock b/Gemfile.lock
index cd88e37e..5754a2e6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -26,10 +26,13 @@ GEM
     unicode-display_width (2.5.0)
 
 PLATFORMS
+  ruby
+  x64-mingw32
   x86_64-darwin-22
+  x86_64-linux
 
 DEPENDENCIES
-  bundler
+  bundler (~> 2.5)
   constructor
   deep_merge
   diy
@@ -41,4 +44,4 @@ DEPENDENCIES
   unicode-display_width
 
 BUNDLED WITH
-   2.4.17
+   2.5.10