diff --git a/src/Gemfile b/src/Gemfile
index 3c07d3d..aec0bde 100644
--- a/src/Gemfile
+++ b/src/Gemfile
@@ -7,6 +7,7 @@ git_source(:github) { |repo_name| "https://github.com/#{repo_name}" }
 # gem "rails"
 
 gem "sinatra"
+gem "sinatra-reloader"
 gem "sqlite3"
 gem "slim"
 gem "sassc"
diff --git a/src/Gemfile.lock b/src/Gemfile.lock
index c3e420f..8424125 100644
--- a/src/Gemfile.lock
+++ b/src/Gemfile.lock
@@ -2,6 +2,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     ffi (1.15.5)
+    multi_json (1.15.0)
     mustermann (1.1.1)
       ruby2_keywords (>= 0.0.1)
     rack (2.2.3)
@@ -15,6 +16,14 @@ GEM
       rack (>= 2.2)
       rack-protection (= 2.1.0)
       tilt (>= 2.0)
+    sinatra-contrib (2.1.0)
+      multi_json
+      mustermann (~> 1.0)
+      rack-protection (= 2.1.0)
+      sinatra (= 2.1.0)
+      tilt (~> 2.0)
+    sinatra-reloader (1.0)
+      sinatra-contrib
     slim (4.1.0)
       temple (>= 0.7.6, < 0.9)
       tilt (>= 2.0.6, < 2.1)
@@ -28,6 +37,7 @@ PLATFORMS
 DEPENDENCIES
   sassc
   sinatra
+  sinatra-reloader
   slim
   sqlite3