diff --git a/app/controllers/concerns/browse_everything/parameters.rb b/app/controllers/concerns/browse_everything/parameters.rb
index 44c2a1a1..06fca1f0 100644
--- a/app/controllers/concerns/browse_everything/parameters.rb
+++ b/app/controllers/concerns/browse_everything/parameters.rb
@@ -34,7 +34,8 @@ def selected_files
         return [] unless selected_params
 
         values = selected_params.values.uniq
-        values.map { |value| BrowseEverything::Resource.new(value) }
+        selected_resources = values.map { |value| BrowseEverything::Resource.new(value) }
+        selected_resources.reject(&:hidden?)
       end
 
       # Determine whether or not cloud service files are being uploaded
diff --git a/browse-everything.gemspec b/browse-everything.gemspec
index 72068b39..fb657029 100644
--- a/browse-everything.gemspec
+++ b/browse-everything.gemspec
@@ -25,7 +25,7 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'google-api-client', '~> 0.23'
   spec.add_dependency 'google_drive', '~> 2.1'
   spec.add_dependency 'googleauth', '0.6.6'
-  spec.add_dependency 'puma', '~> 3.11'
+  spec.add_dependency 'puma', '< 4.0'
   spec.add_dependency 'rails', '>= 4.2'
   spec.add_dependency 'ruby-box'
   spec.add_dependency 'signet', '~> 0.8'
diff --git a/lib/browse_everything/driver/box.rb b/lib/browse_everything/driver/box.rb
index 97da3095..76fe42b5 100644
--- a/lib/browse_everything/driver/box.rb
+++ b/lib/browse_everything/driver/box.rb
@@ -45,6 +45,7 @@ def contents(id = '', _page_index = 0)
                    box_client.folder_by_id(id)
                  end
 
+        values = []
         folder.items(ITEM_LIMIT, 0, %w[name size created_at]).collect do |f|
           values << directory_entry(f)
         end
diff --git a/lib/browse_everything/driver/file_system.rb b/lib/browse_everything/driver/file_system.rb
index 96438b42..6bf2e224 100644
--- a/lib/browse_everything/driver/file_system.rb
+++ b/lib/browse_everything/driver/file_system.rb
@@ -43,6 +43,7 @@ def link_for(path)
           end
           entries
         else
+          return [] if hidden?(full_path)
           file_size = file_size(full_path)
           [["file://#{full_path}", { file_name: File.basename(path), file_size: file_size, directory: false }]]
         end
@@ -57,7 +58,7 @@ def authorized?
       # @param display [String] display label for the resource
       # @return [BrowseEverything::FileEntry]
       def details(path, display = File.basename(path))
-        return nil unless File.exist? path
+        return unless File.exist?(path)
         info = File::Stat.new(path)
         BrowseEverything::FileEntry.new(
           make_pathname(path),
@@ -77,7 +78,7 @@ def details(path, display = File.basename(path))
         # @return [Array<BrowseEverything::FileEntry>]
         def make_directory_entry(real_path)
           pattern = File.join(real_path, '*')
-          Dir[pattern].collect { |f| details(f) }
+          Dir.glob(pattern).collect { |f| details(f) }
         end
 
         def make_pathname(path)
@@ -93,6 +94,13 @@ def file_size(path)
           Rails.logger.error "Failed to find the file size for #{path}: #{error}"
           0
         end
+
+        # Determines whether or not a file entry is hidden
+        # @param [String] path
+        # @return [Boolean]
+        def hidden?(path)
+          path =~ /^\..+/
+        end
     end
   end
 end
diff --git a/lib/browse_everything/resource.rb b/lib/browse_everything/resource.rb
index 765e765a..753d8080 100644
--- a/lib/browse_everything/resource.rb
+++ b/lib/browse_everything/resource.rb
@@ -12,13 +12,18 @@ def path
       uri
     end
 
+    def file?
+      url =~ /^file\:/
+    end
+
     # Determine whether or not this file is a cloud resource
     # @return [Boolean]
     def cloud_file?
-      return false if url.nil?
+      url =~ /^https?\:/
+    end
 
-      m = /^https?\:/.match(url)
-      !m.nil?
+    def hidden?
+      file? && path =~ /^\./
     end
 
     private
diff --git a/spec/fixtures/file_system/.hidden.txt b/spec/fixtures/file_system/.hidden.txt
new file mode 100644
index 00000000..e69de29b
diff --git a/spec/lib/browse_everything/driver/file_system_spec.rb b/spec/lib/browse_everything/driver/file_system_spec.rb
index ca88bcce..1a105370 100644
--- a/spec/lib/browse_everything/driver/file_system_spec.rb
+++ b/spec/lib/browse_everything/driver/file_system_spec.rb
@@ -55,6 +55,14 @@
         its(:type)     { is_expected.to eq('application/pdf') }
         specify        { is_expected.not_to be_container }
       end
+
+      context 'when there is a hidden file' do
+        it 'does not retrieve the file path' do
+          expect(contents.length).to eq 4
+          file_entry_names = contents.map(&:name)
+          expect(file_entry_names).not_to include '.hidden.txt'
+        end
+      end
     end
 
     context 'when there is a subdirectory' do