diff --git a/Gemfile b/Gemfile
index 50c67e5..da05e97 100644
--- a/Gemfile
+++ b/Gemfile
@@ -34,11 +34,17 @@ group :development, :test do
   gem 'rspec-rails'
 end
 
+group :test do
+  gem 'shoulda-matchers'
+end
+
 group :development do
   gem 'listen', '>= 3.0.5', '< 3.2'
   # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
   gem 'spring'
   gem 'spring-watcher-listen', '~> 2.0.0'
+  gem 'rb-readline'
+  gem 'pry-rails'
 end
 
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 33afe25..c71c5ce 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -47,6 +47,7 @@ GEM
       msgpack (~> 1.0)
     builder (3.2.3)
     byebug (11.0.1)
+    coderay (1.1.2)
     concurrent-ruby (1.1.5)
     crass (1.0.4)
     diff-lcs (1.3)
@@ -76,6 +77,11 @@ GEM
     nio4r (2.3.1)
     nokogiri (1.10.3)
       mini_portile2 (~> 2.4.0)
+    pry (0.12.2)
+      coderay (~> 1.1.0)
+      method_source (~> 0.9.0)
+    pry-rails (0.3.6)
+      pry (>= 0.10.4)
     puma (3.12.1)
     rack (2.0.7)
     rack-test (1.1.0)
@@ -108,6 +114,7 @@ GEM
     rb-fsevent (0.10.3)
     rb-inotify (0.10.0)
       ffi (~> 1.0)
+    rb-readline (0.5.5)
     rspec-core (3.8.2)
       rspec-support (~> 3.8.0)
     rspec-expectations (3.8.4)
@@ -126,6 +133,8 @@ GEM
       rspec-support (~> 3.8.0)
     rspec-support (3.8.2)
     ruby_dep (1.5.0)
+    shoulda-matchers (4.1.0)
+      activesupport (>= 4.2.0)
     spring (2.1.0)
     spring-watcher-listen (2.0.1)
       listen (>= 2.7, < 4.0)
@@ -153,9 +162,12 @@ DEPENDENCIES
   bootsnap (>= 1.1.0)
   byebug
   listen (>= 3.0.5, < 3.2)
+  pry-rails
   puma (~> 3.11)
   rails (~> 5.2.3)
+  rb-readline
   rspec-rails
+  shoulda-matchers
   spring
   spring-watcher-listen (~> 2.0.0)
   sqlite3