diff --git a/geojson2image.gemspec b/geojson2image.gemspec
index 8a6c7a8..ab3fea4 100644
--- a/geojson2image.gemspec
+++ b/geojson2image.gemspec
@@ -21,7 +21,7 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
 
-  spec.add_dependency "oj", "~> 2.18"
+  spec.add_dependency "oj", "~> 3.0"
   spec.add_dependency "mini_magick", "~> 4.6.0"
   spec.add_development_dependency "bundler", "~> 1.13"
   spec.add_development_dependency "rake", "~> 10.0"
diff --git a/lib/geojson2image/version.rb b/lib/geojson2image/version.rb
index 521b7c5..7f8e380 100644
--- a/lib/geojson2image/version.rb
+++ b/lib/geojson2image/version.rb
@@ -1,3 +1,3 @@
 module Geojson2image
-  VERSION = "0.1.1"
+  VERSION = "0.1.2"
 end