diff --git a/lib/refile/s3.rb b/lib/refile/s3.rb
index 25187a2..d70c4f9 100644
--- a/lib/refile/s3.rb
+++ b/lib/refile/s3.rb
@@ -45,7 +45,7 @@ def initialize(region:, bucket:, max_size: nil, prefix: nil, hasher: Refile::Ran
       @s3 = Aws::S3::Resource.new @s3_options
       credentials = @s3.client.config.credentials
       raise S3CredentialsError unless credentials
-      @access_key_id = credentials.access_key_id
+      @access_key_id = credentials.access_key_id rescue nil
       @bucket_name = bucket
       @bucket = @s3.bucket @bucket_name
       @hasher = hasher
diff --git a/lib/refile/s3/version.rb b/lib/refile/s3/version.rb
index a039184..34c9a60 100644
--- a/lib/refile/s3/version.rb
+++ b/lib/refile/s3/version.rb
@@ -1,5 +1,5 @@
 module Refile
   class S3
-    VERSION = "0.2.0"
+    VERSION = "0.3.0"
   end
 end
diff --git a/refile-s3.gemspec b/refile-s3.gemspec
index 4b4659f..da8e203 100644
--- a/refile-s3.gemspec
+++ b/refile-s3.gemspec
@@ -20,8 +20,8 @@ Gem::Specification.new do |spec|
   spec.required_ruby_version = ">= 2.1.0"
 
   spec.add_dependency "refile", "~> 0.7.0"
-  spec.add_dependency "aws-sdk-s3", "~> 1.23"
-  spec.add_development_dependency "bundler", "~> 1.7"
+  spec.add_dependency "aws-sdk-s3", "~> 1.93"
+  spec.add_development_dependency "bundler", "~> 2.2"
   spec.add_development_dependency "rake", "~> 10.0"
   spec.add_development_dependency "rspec", "~> 3.0"
   spec.add_development_dependency "webmock"