diff --git a/config/application.rb b/config/application.rb
index 4cbd4c94af..603050a1ed 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -1,3 +1,4 @@
+require File.expand_path('../rails_bigdecimal_fix', __FILE__)
 require 'rails'
 require File.expand_path('../boot', __FILE__)
 
diff --git a/config/boot.rb b/config/boot.rb
index a9a3bfda34..dc15c7a2a9 100644
--- a/config/boot.rb
+++ b/config/boot.rb
@@ -9,6 +9,8 @@ GEMFILE_EXTENSIONS = [
 msfenv_real_pathname = Pathname.new(__FILE__).realpath
 root = msfenv_real_pathname.parent.parent
 
+require File.expand_path('../rails_bigdecimal_fix', __FILE__)
+
 unless ENV['BUNDLE_GEMFILE']
   require 'pathname'
 
@@ -22,18 +24,6 @@ unless ENV['BUNDLE_GEMFILE']
   end
 end
 
-# Remove bigdecimal warning - start
-# https://github.com/ruby/bigdecimal/pull/115
-# https://github.com/rapid7/metasploit-framework/pull/11184#issuecomment-461971266
-# TODO: remove when upgrading from rails 4.x
-require 'bigdecimal'
-
-def BigDecimal.new(*args, **kwargs)
-  return BigDecimal(*args) if kwargs.empty?
-  BigDecimal(*args, **kwargs)
-end
-# Remove bigdecimal warning - end
-
 begin
   require 'bundler/setup'
 rescue LoadError => e
diff --git a/config/rails_bigdecimal_fix.rb b/config/rails_bigdecimal_fix.rb
new file mode 100644
index 0000000000..fbe0465fd7
--- /dev/null
+++ b/config/rails_bigdecimal_fix.rb
@@ -0,0 +1,11 @@
+# Remove bigdecimal warning - start
+# https://github.com/ruby/bigdecimal/pull/115
+# https://github.com/rapid7/metasploit-framework/pull/11184#issuecomment-461971266
+# TODO: remove when upgrading from rails 4.x
+require 'bigdecimal'
+
+def BigDecimal.new(*args, **kwargs)
+  return BigDecimal(*args) if kwargs.empty?
+  BigDecimal(*args, **kwargs)
+end
+# Remove bigdecimal warning - end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index a5b1cfc002..4558f6cd47 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -3,6 +3,8 @@ require 'stringio'
 
 ENV['RAILS_ENV'] = 'test'
 
+require File.expand_path('../../config/rails_bigdecimal_fix', __FILE__)
+
 # @note must be before loading config/environment because railtie needs to be loaded before
 #   `Metasploit::Framework::Application.initialize!` is called.
 #