diff --git a/Gemfile.lock b/Gemfile.lock
index 1c28da1..394f0e4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -20,21 +20,28 @@ GEM
     addressable (2.3.5)
     atomic (1.1.14)
     builder (3.1.4)
-    coderay (1.0.9)
+    coderay (1.1.3)
     crack (0.4.1)
       safe_yaml (~> 0.9.0)
     diff-lcs (1.2.4)
-    ffi (1.9.0)
+    ffi (1.9.24)
     formatador (0.2.4)
-    guard (1.8.3)
+    guard (2.19.1)
       formatador (>= 0.2.4)
-      listen (~> 1.3)
-      lumberjack (>= 1.0.2)
-      pry (>= 0.9.10)
-      thor (>= 0.14.6)
-    guard-bundler (1.0.0)
-      bundler (~> 1.0)
-      guard (~> 1.1)
+      listen (>= 2.7, < 4.0)
+      logger (~> 1.6)
+      lumberjack (>= 1.0.12, < 2.0)
+      nenv (~> 0.1)
+      notiffany (~> 0.0)
+      ostruct (~> 0.6)
+      pry (>= 0.13.0)
+      shellany (~> 0.0)
+      thor (>= 0.18.1)
+    guard-bundler (3.0.1)
+      bundler (>= 2.1, < 3)
+      guard (~> 2.2)
+      guard-compat (~> 1.1)
+    guard-compat (1.2.1)
     guard-rspec (3.1.0)
       guard (>= 1.8)
       rspec (~> 2.13)
@@ -43,25 +50,27 @@ GEM
       multi_xml (>= 0.5.2)
     i18n (0.6.5)
     json (1.8.1)
-    listen (1.3.1)
-      rb-fsevent (>= 0.9.3)
-      rb-inotify (>= 0.9)
-      rb-kqueue (>= 0.2)
-    lumberjack (1.0.4)
-    method_source (0.8.2)
+    listen (3.9.0)
+      rb-fsevent (~> 0.10, >= 0.10.3)
+      rb-inotify (~> 0.9, >= 0.9.10)
+    logger (1.7.0)
+    lumberjack (1.4.2)
+    method_source (1.1.0)
     minitest (4.7.5)
     multi_json (1.8.2)
     multi_xml (0.5.5)
-    pry (0.9.12.2)
-      coderay (~> 1.0.5)
-      method_source (~> 0.8)
-      slop (~> 3.4)
+    nenv (0.3.0)
+    notiffany (0.1.3)
+      nenv (~> 0.1)
+      shellany (~> 0.0)
+    ostruct (0.6.3)
+    pry (0.15.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
     rake (10.1.0)
-    rb-fsevent (0.9.3)
-    rb-inotify (0.9.2)
-      ffi (>= 0.5.0)
-    rb-kqueue (0.2.0)
-      ffi (>= 0.5.0)
+    rb-fsevent (0.11.2)
+    rb-inotify (0.11.1)
+      ffi (~> 1.0)
     rspec (2.14.1)
       rspec-core (~> 2.14.0)
       rspec-expectations (~> 2.14.0)
@@ -71,7 +80,7 @@ GEM
       diff-lcs (>= 1.1.3, < 2.0)
     rspec-mocks (2.14.3)
     safe_yaml (0.9.5)
-    slop (3.4.6)
+    shellany (0.0.1)
     thor (0.18.1)
     thread_safe (0.1.3)
       atomic