diff --git a/Gemfile.lock b/Gemfile.lock
index 0f351bb..bc045a8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -127,7 +127,6 @@ GEM
     sdoc (0.4.2)
       json (~> 1.7, >= 1.7.7)
       rdoc (~> 4.0)
-    spring (2.1.0)
     sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
@@ -142,7 +141,7 @@ GEM
     turbolinks (5.2.0)
       turbolinks-source (~> 5.2)
     turbolinks-source (5.2.0)
-    tzinfo (1.2.5)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     uglifier (4.1.20)
       execjs (>= 0.3.0, < 3)
@@ -167,7 +166,6 @@ DEPENDENCIES
   rails (= 4.2.11.1)
   sass-rails (~> 5.0)
   sdoc (~> 0.4.0)
-  spring
   sqlite3
   turbolinks
   uglifier (>= 1.3.0)