diff --git a/README.md b/README.md
index 50bd950..94b7807 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ specified number of times until the example succeeds.
 
 | Rspec Version | Rspec-Retry Version |
 |---------------|---------------------|
-| 3.3-3.6       | 0.5.4               |
+| 3.3-3.6       | 0.5.5               |
 | 3.2           | 0.4.6               |
 | 2.14.8        | 0.4.4               |
 
diff --git a/gemfiles/rspec_3.3.gemfile b/gemfiles/rspec_3.3.gemfile
index eee70bc..62a5c92 100644
--- a/gemfiles/rspec_3.3.gemfile
+++ b/gemfiles/rspec_3.3.gemfile
@@ -4,4 +4,4 @@ source "https://rubygems.org"
 
 gem "rspec", "~> 3.3.0"
 
-gemspec :path => "../"
+gemspec path: "../"
diff --git a/gemfiles/rspec_3.3.gemfile.lock b/gemfiles/rspec_3.3.gemfile.lock
index 6d3e00d..de2d3ef 100644
--- a/gemfiles/rspec_3.3.gemfile.lock
+++ b/gemfiles/rspec_3.3.gemfile.lock
@@ -1,25 +1,25 @@
 PATH
   remote: ..
   specs:
-    rspec-retry (0.5.4)
+    rspec-retry (0.5.5)
       rspec-core (> 3.3, < 3.7)
 
 GEM
   remote: https://rubygems.org/
   specs:
-    appraisal (2.1.0)
+    appraisal (2.2.0)
       bundler
       rake
       thor (>= 0.14.0)
     byebug (9.0.6)
     coderay (1.1.1)
-    diff-lcs (1.2.5)
+    diff-lcs (1.3)
     method_source (0.8.2)
     pry (0.10.4)
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
-    pry-byebug (3.4.0)
+    pry-byebug (3.4.2)
       byebug (~> 9.0)
       pry (~> 0.10)
     rake (11.3.0)
@@ -37,16 +37,17 @@ GEM
       rspec-support (~> 3.3.0)
     rspec-support (3.3.0)
     slop (3.6.0)
-    thor (0.19.1)
+    thor (0.20.0)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
   appraisal
+  byebug (~> 9.0.6)
   pry-byebug
   rspec (~> 3.3.0)
   rspec-retry!
 
 BUNDLED WITH
-   1.14.6
+   1.15.4
diff --git a/gemfiles/rspec_3.4.gemfile b/gemfiles/rspec_3.4.gemfile
index b6de4f4..65438b6 100644
--- a/gemfiles/rspec_3.4.gemfile
+++ b/gemfiles/rspec_3.4.gemfile
@@ -4,4 +4,4 @@ source "https://rubygems.org"
 
 gem "rspec", "~> 3.4.0"
 
-gemspec :path => "../"
+gemspec path: "../"
diff --git a/gemfiles/rspec_3.4.gemfile.lock b/gemfiles/rspec_3.4.gemfile.lock
index bf9b585..990c46f 100644
--- a/gemfiles/rspec_3.4.gemfile.lock
+++ b/gemfiles/rspec_3.4.gemfile.lock
@@ -1,28 +1,28 @@
 PATH
   remote: ..
   specs:
-    rspec-retry (0.5.4)
+    rspec-retry (0.5.5)
       rspec-core (> 3.3, < 3.7)
 
 GEM
   remote: https://rubygems.org/
   specs:
-    appraisal (2.1.0)
+    appraisal (2.2.0)
       bundler
       rake
       thor (>= 0.14.0)
     byebug (9.0.6)
     coderay (1.1.1)
-    diff-lcs (1.2.5)
+    diff-lcs (1.3)
     method_source (0.8.2)
     pry (0.10.4)
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
-    pry-byebug (3.4.0)
+    pry-byebug (3.4.2)
       byebug (~> 9.0)
       pry (~> 0.10)
-    rake (11.3.0)
+    rake (12.0.0)
     rspec (3.4.0)
       rspec-core (~> 3.4.0)
       rspec-expectations (~> 3.4.0)
@@ -37,16 +37,17 @@ GEM
       rspec-support (~> 3.4.0)
     rspec-support (3.4.1)
     slop (3.6.0)
-    thor (0.19.1)
+    thor (0.20.0)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
   appraisal
+  byebug (~> 9.0.6)
   pry-byebug
   rspec (~> 3.4.0)
   rspec-retry!
 
 BUNDLED WITH
-   1.14.6
+   1.15.4
diff --git a/gemfiles/rspec_3.5.gemfile b/gemfiles/rspec_3.5.gemfile
index 09dcce2..4bae171 100644
--- a/gemfiles/rspec_3.5.gemfile
+++ b/gemfiles/rspec_3.5.gemfile
@@ -4,4 +4,4 @@ source "https://rubygems.org"
 
 gem "rspec", "~> 3.5.0"
 
-gemspec :path => "../"
+gemspec path: "../"
diff --git a/gemfiles/rspec_3.5.gemfile.lock b/gemfiles/rspec_3.5.gemfile.lock
index 49f043d..8b707b1 100644
--- a/gemfiles/rspec_3.5.gemfile.lock
+++ b/gemfiles/rspec_3.5.gemfile.lock
@@ -1,28 +1,28 @@
 PATH
   remote: ..
   specs:
-    rspec-retry (0.5.4)
+    rspec-retry (0.5.5)
       rspec-core (> 3.3, < 3.7)
 
 GEM
   remote: https://rubygems.org/
   specs:
-    appraisal (2.1.0)
+    appraisal (2.2.0)
       bundler
       rake
       thor (>= 0.14.0)
     byebug (9.0.6)
     coderay (1.1.1)
-    diff-lcs (1.2.5)
+    diff-lcs (1.3)
     method_source (0.8.2)
     pry (0.10.4)
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
-    pry-byebug (3.4.0)
+    pry-byebug (3.4.2)
       byebug (~> 9.0)
       pry (~> 0.10)
-    rake (11.3.0)
+    rake (12.0.0)
     rspec (3.5.0)
       rspec-core (~> 3.5.0)
       rspec-expectations (~> 3.5.0)
@@ -37,16 +37,17 @@ GEM
       rspec-support (~> 3.5.0)
     rspec-support (3.5.0)
     slop (3.6.0)
-    thor (0.19.1)
+    thor (0.20.0)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
   appraisal
+  byebug (~> 9.0.6)
   pry-byebug
   rspec (~> 3.5.0)
   rspec-retry!
 
 BUNDLED WITH
-   1.14.6
+   1.15.4
diff --git a/gemfiles/rspec_3.6.gemfile b/gemfiles/rspec_3.6.gemfile
index 9fcb23c..0bb6b26 100644
--- a/gemfiles/rspec_3.6.gemfile
+++ b/gemfiles/rspec_3.6.gemfile
@@ -4,4 +4,4 @@ source "https://rubygems.org"
 
 gem "rspec", "~> 3.6.0"
 
-gemspec :path => "../"
+gemspec path: "../"
diff --git a/gemfiles/rspec_3.6.gemfile.lock b/gemfiles/rspec_3.6.gemfile.lock
index 8ae31e8..6f655c3 100644
--- a/gemfiles/rspec_3.6.gemfile.lock
+++ b/gemfiles/rspec_3.6.gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: ..
   specs:
-    rspec-retry (0.5.4)
+    rspec-retry (0.5.5)
       rspec-core (> 3.3, < 3.7)
 
 GEM
@@ -37,16 +37,17 @@ GEM
       rspec-support (~> 3.6.0)
     rspec-support (3.6.0)
     slop (3.6.0)
-    thor (0.19.4)
+    thor (0.20.0)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
   appraisal
+  byebug (~> 9.0.6)
   pry-byebug
   rspec (~> 3.6.0)
   rspec-retry!
 
 BUNDLED WITH
-   1.14.6
+   1.15.4
diff --git a/lib/rspec/retry/version.rb b/lib/rspec/retry/version.rb
index d0798b1..ff6b001 100644
--- a/lib/rspec/retry/version.rb
+++ b/lib/rspec/retry/version.rb
@@ -1,5 +1,5 @@
 module RSpec
   class Retry
-    VERSION = "0.5.4"
+    VERSION = "0.5.5"
   end
 end
diff --git a/rspec-retry.gemspec b/rspec-retry.gemspec
index cabd3c5..25cefdc 100644
--- a/rspec-retry.gemspec
+++ b/rspec-retry.gemspec
@@ -18,9 +18,6 @@ Gem::Specification.new do |gem|
   gem.add_runtime_dependency(%{rspec-core}, '>3.3', '<3.7')
   gem.add_development_dependency %q{appraisal}
   gem.add_development_dependency %q{rspec}
-  if Gem::Version.new(RUBY_VERSION) < Gem::Version.new('2')
-    gem.add_development_dependency %q{pry-debugger}
-  else
-    gem.add_development_dependency %q{pry-byebug}
-  end
+  gem.add_development_dependency %q{byebug}, '~>9.0.6' # 9.1 deprecates ruby 2.1
+  gem.add_development_dependency %q{pry-byebug}
 end