diff --git a/Gemfile.lock b/Gemfile.lock
index e07de2b2..298217cd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,7 +6,7 @@ GEM
       i18n (~> 0.7)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    backports (3.10.3)
+    backports (3.11.0)
     better_errors (2.4.0)
       coderay (>= 1.0.0)
       erubi (>= 1.0.0)
@@ -18,13 +18,13 @@ GEM
       execjs
     coffee-script-source (1.12.2)
     concurrent-ruby (1.0.5)
-    daemons (1.2.5)
+    daemons (1.2.6)
     erubi (1.7.0)
     ethon (0.11.0)
       ffi (>= 1.3.0)
     eventmachine (1.2.5)
     execjs (2.7.0)
-    exifr (1.3.2)
+    exifr (1.3.3)
     ffi (1.9.18)
     fspath (3.1.0)
     highline (1.7.10)
@@ -33,20 +33,20 @@ GEM
       nokogiri (>= 1.4)
     i18n (0.9.1)
       concurrent-ruby (~> 1.0)
-    image_optim (0.26.0)
+    image_optim (0.26.1)
       exifr (~> 1.2, >= 1.2.2)
       fspath (~> 3.0)
       image_size (~> 1.5)
       in_threads (~> 1.3)
       progress (~> 3.0, >= 3.0.1)
-    image_optim_pack (0.5.0.20171101)
+    image_optim_pack (0.5.0.20180103)
       fspath (>= 2.1, < 4)
       image_optim (~> 0.19)
     image_size (1.5.0)
     in_threads (1.5.0)
     method_source (0.9.0)
     mini_portile2 (2.3.0)
-    minitest (5.10.3)
+    minitest (5.11.1)
     multi_json (1.12.2)
     mustermann (1.0.1)
     nokogiri (1.8.1)
@@ -69,7 +69,7 @@ GEM
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
     rr (1.2.1)
-    sass (3.5.3)
+    sass (3.5.5)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
@@ -102,13 +102,13 @@ GEM
       tty-screen (~> 0.6.0)
       tty-which (~> 0.3.0)
       verse (~> 0.5.0)
-    tty-screen (0.6.3)
+    tty-screen (0.6.4)
     tty-which (0.3.0)
     typhoeus (1.3.0)
       ethon (>= 0.9.0)
     tzinfo (1.2.4)
       thread_safe (~> 0.1)
-    uglifier (3.2.0)
+    uglifier (4.1.3)
       execjs (>= 0.3.0, < 3)
     unicode-display_width (1.1.3)
     unicode_utils (1.4.0)