diff --git a/Gemfile b/Gemfile
index 6b69e75..669643a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -14,7 +14,6 @@ gem 'ruby-prof'
 
 gem 'sqlite3'
 gem 'foreman'
-gem 'crack', '0.3.2'
 
 # Pry for Rails, not in dev group in case running via prod/staging @ a training
 gem 'pry-rails'
diff --git a/Gemfile.lock b/Gemfile.lock
index f0add55..7c21f12 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -82,7 +82,6 @@ GEM
     coffee-script-source (1.12.2)
     concurrent-ruby (1.0.5)
     contracts (0.16.0)
-    crack (0.3.2)
     crass (1.0.3)
     cucumber (3.1.0)
       builder (>= 2.1.2)
@@ -336,7 +335,6 @@ DEPENDENCIES
   bundler-audit
   capybara
   coffee-rails
-  crack (= 0.3.2)
   database_cleaner
   execjs
   foreman