diff --git a/.travis.yml b/.travis.yml
index ef54fc1..c0dc6c4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,3 +2,4 @@ language: ruby
 rvm:
   - 2.3.0
 before_install:
+  - gem install bundler
diff --git a/Gemfile.lock b/Gemfile.lock
index 274e63f..2d9a3bc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    persistent-cache-storage-sqlite (0.1.4)
+    persistent-cache-storage-sqlite (0.1.5)
       eh (~> 1.0.0)
       persistent-cache-storage-api (~> 0.1)
       sqlite3 (~> 1.4)
@@ -19,9 +19,9 @@ GEM
     diff-lcs (1.3)
     docile (1.3.2)
     eh (1.0.0)
-    json (2.2.0)
+    json (2.3.1)
     persistent-cache-storage-api (0.1.5)
-    rake (12.3.2)
+    rake (13.0.1)
     rspec (3.8.0)
       rspec-core (~> 3.8.0)
       rspec-expectations (~> 3.8.0)
@@ -54,8 +54,8 @@ DEPENDENCIES
   byebug (~> 9.0)
   coveralls (~> 0.8)
   persistent-cache-storage-sqlite!
-  rake (~> 12.3)
+  rake (~> 13.0)
   rspec (~> 3.8)
 
 BUNDLED WITH
-   1.16.6
+   2.1.4
diff --git a/lib/persistent-cache/version.rb b/lib/persistent-cache/version.rb
index c9d2e75..cf6b573 100644
--- a/lib/persistent-cache/version.rb
+++ b/lib/persistent-cache/version.rb
@@ -1,7 +1,7 @@
 module Persistent
   module Storage
     module Sqlite
-      VERSION = "0.1.4"
+      VERSION = "0.1.5"
     end
   end
 end
diff --git a/persistent-cache-storage-sqlite.gemspec b/persistent-cache-storage-sqlite.gemspec
index d96e5aa..7525854 100644
--- a/persistent-cache-storage-sqlite.gemspec
+++ b/persistent-cache-storage-sqlite.gemspec
@@ -20,7 +20,7 @@ Gem::Specification.new do |spec|
   spec.require_paths = ['lib']
 
   spec.add_development_dependency 'bundler', '~> 1.3'
-  spec.add_development_dependency 'rake', '~> 12.3'
+  spec.add_development_dependency 'rake', '~> 13.0'
   spec.add_development_dependency 'rspec', '~> 3.8'
   spec.add_development_dependency 'coveralls', '~> 0.8'
   spec.add_development_dependency 'byebug', '~> 9.0'