diff --git a/Gemfile b/Gemfile
index 8678d30..325506e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -12,4 +12,4 @@ gem "ruby-prof", "~> 0.9.2", :platforms => [:mri_18, :mri_19], :group => :develo
 gem "rake", "~> 0.9", :group => :test
 gem 'rspec', '~> 2.6.0', :group => :test
 gem "cucumber", "1.0.0", :group => :test
-gem "appraisal", '~> 0.3.6', :group => :test
+gem "appraisal", '~> 0.3.8', :group => :test
diff --git a/gemfiles/activesupport3.0-rpsec2.6.gemfile b/gemfiles/activesupport3.0-rpsec2.6.gemfile
index e55f2fe..1adc8dd 100644
--- a/gemfiles/activesupport3.0-rpsec2.6.gemfile
+++ b/gemfiles/activesupport3.0-rpsec2.6.gemfile
@@ -8,7 +8,7 @@ gem "ruby-prof", "~> 0.9.2", :platforms=>[:mri_18, :mri_19], :group=>:developmen
 gem "rake", "~> 0.9", :group=>:test
 gem "rspec", "~> 2.6.0"
 gem "cucumber", "1.0.0", :group=>:test
-gem "appraisal", "~> 0.3.6", :group=>:test
+gem "appraisal", "~> 0.3.8", :group=>:test
 gem "i18n", "~> 0.5.0"
 gem "activesupport", "~> 3.0.0"
 
diff --git a/gemfiles/activesupport3.0-rpsec2.7.gemfile b/gemfiles/activesupport3.0-rpsec2.7.gemfile
index d1b2175..f5cfcbf 100644
--- a/gemfiles/activesupport3.0-rpsec2.7.gemfile
+++ b/gemfiles/activesupport3.0-rpsec2.7.gemfile
@@ -8,7 +8,7 @@ gem "ruby-prof", "~> 0.9.2", :platforms=>[:mri_18, :mri_19], :group=>:developmen
 gem "rake", "~> 0.9", :group=>:test
 gem "rspec", "~> 2.7.0"
 gem "cucumber", "1.0.0", :group=>:test
-gem "appraisal", "~> 0.3.6", :group=>:test
+gem "appraisal", "~> 0.3.8", :group=>:test
 gem "i18n", "~> 0.5.0"
 gem "activesupport", "~> 3.0.0"
 
diff --git a/gemfiles/activesupport3.1-rspec2.6.gemfile b/gemfiles/activesupport3.1-rspec2.6.gemfile
index 5af765b..7e1c036 100644
--- a/gemfiles/activesupport3.1-rspec2.6.gemfile
+++ b/gemfiles/activesupport3.1-rspec2.6.gemfile
@@ -8,7 +8,7 @@ gem "ruby-prof", "~> 0.9.2", :platforms=>[:mri_18, :mri_19], :group=>:developmen
 gem "rake", "~> 0.9", :group=>:test
 gem "rspec", "~> 2.6.0"
 gem "cucumber", "1.0.0", :group=>:test
-gem "appraisal", "~> 0.3.6", :group=>:test
+gem "appraisal", "~> 0.3.8", :group=>:test
 gem "i18n", "~> 0.6.0"
 gem "activesupport", "~> 3.1.0"
 
diff --git a/gemfiles/activesupport3.1-rspec2.7.gemfile b/gemfiles/activesupport3.1-rspec2.7.gemfile
index cb97146..cae049c 100644
--- a/gemfiles/activesupport3.1-rspec2.7.gemfile
+++ b/gemfiles/activesupport3.1-rspec2.7.gemfile
@@ -8,7 +8,7 @@ gem "ruby-prof", "~> 0.9.2", :platforms=>[:mri_18, :mri_19], :group=>:developmen
 gem "rake", "~> 0.9", :group=>:test
 gem "rspec", "~> 2.7.0"
 gem "cucumber", "1.0.0", :group=>:test
-gem "appraisal", "~> 0.3.6", :group=>:test
+gem "appraisal", "~> 0.3.8", :group=>:test
 gem "i18n", "~> 0.6.0"
 gem "activesupport", "~> 3.1.0"
 
diff --git a/rspec-subject-extensions.gemspec b/rspec-subject-extensions.gemspec
index 13c9fd7..4e61eff 100644
--- a/rspec-subject-extensions.gemspec
+++ b/rspec-subject-extensions.gemspec
@@ -31,5 +31,5 @@ Gem::Specification.new do |s|
   s.add_development_dependency "guard-rspec", "0.1.9"
   s.add_development_dependency 'guard-cucumber', "~> 0.5.1"
   s.add_development_dependency "growl", "1.0.3"
-  s.add_development_dependency "appraisal", '~> 0.3.7'
+  s.add_development_dependency "appraisal", '~> 0.3.8'
 end
\ No newline at end of file