diff --git a/Gemfile b/Gemfile
index b7d256a..82e6e13 100644
--- a/Gemfile
+++ b/Gemfile
@@ -38,7 +38,7 @@ group :development, :test do
   gem "rspec-rails", "~> 3.8"
   gem "rspec_junit_formatter"
   gem "rubocop"
-  gem "shoulda-matchers", "~> 4.1"
+  gem "shoulda-matchers", "~> 4.5"
   gem "simplecov", require: false
   gem "timecop"
   gem "webmock"
diff --git a/Gemfile.lock b/Gemfile.lock
index 9689e73..f245ac5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -60,7 +60,7 @@ GEM
       rack-test (>= 0.6.3)
       regexp_parser (~> 1.5)
       xpath (~> 3.2)
-    concurrent-ruby (1.1.5)
+    concurrent-ruby (1.1.8)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
     crass (1.0.4)
@@ -84,7 +84,7 @@ GEM
     globalid (0.4.2)
       activesupport (>= 4.2.0)
     hashdiff (0.4.0)
-    i18n (1.6.0)
+    i18n (1.8.7)
       concurrent-ruby (~> 1.0)
     jaro_winkler (1.5.2)
     jbuilder (2.9.1)
@@ -106,7 +106,7 @@ GEM
     mini_magick (4.9.3)
     mini_mime (1.0.1)
     mini_portile2 (2.4.0)
-    minitest (5.11.3)
+    minitest (5.14.3)
     msgpack (1.2.10)
     multipart-post (2.1.0)
     nio4r (2.3.1)
@@ -182,7 +182,7 @@ GEM
     ruby-progressbar (1.10.1)
     ruby_dep (1.5.0)
     safe_yaml (1.0.5)
-    shoulda-matchers (4.1.0)
+    shoulda-matchers (4.5.1)
       activesupport (>= 4.2.0)
     simplecov (0.16.1)
       docile (~> 1.1)
@@ -204,7 +204,7 @@ GEM
     thor (0.20.3)
     thread_safe (0.3.6)
     timecop (0.9.1)
-    tzinfo (1.2.5)
+    tzinfo (1.2.9)
       thread_safe (~> 0.1)
     unicode-display_width (1.6.0)
     web-console (3.7.0)
@@ -251,7 +251,7 @@ DEPENDENCIES
   rspec-rails (~> 3.8)
   rspec_junit_formatter
   rubocop
-  shoulda-matchers (~> 4.1)
+  shoulda-matchers (~> 4.5)
   simplecov
   spring
   spring-watcher-listen (~> 2.0.0)