diff --git a/bundler/lib/bundler/cli.rb b/bundler/lib/bundler/cli.rb
index c27ce896c88b..2938f30e97e6 100644
--- a/bundler/lib/bundler/cli.rb
+++ b/bundler/lib/bundler/cli.rb
@@ -420,6 +420,7 @@ def add(*gems)
     method_option "filter-patch", :type => :boolean, :banner => "Only list patch newer versions"
     method_option "parseable", :aliases => "--porcelain", :type => :boolean, :banner =>
       "Use minimal formatting for more parseable output"
+    method_option "json", :type => :boolean, :banner => "Produce parseable json output"
     method_option "only-explicit", :type => :boolean, :banner =>
       "Only list gems specified in your Gemfile, not their dependencies"
     def outdated(*gems)
diff --git a/bundler/lib/bundler/cli/outdated.rb b/bundler/lib/bundler/cli/outdated.rb
index 68c701aefbbb..783e5fc2c025 100644
--- a/bundler/lib/bundler/cli/outdated.rb
+++ b/bundler/lib/bundler/cli/outdated.rb
@@ -53,13 +53,13 @@ def run
         options[:local] ? definition.resolve_with_cache! : definition.resolve_remotely!
       end
 
-      if options[:parseable]
+      if options[:parseable] || options[:json]
         Bundler.ui.silence(&definition_resolution)
       else
         definition_resolution.call
       end
 
-      Bundler.ui.info ""
+      Bundler.ui.info "" unless options[:json]
 
       # Loop through the current specs
       gemfile_specs, dependency_specs = current_specs.partition do |spec|
@@ -98,27 +98,24 @@ def run
       end
 
       if outdated_gems.empty?
-        unless options[:parseable]
+        if options[:json]
+          print_gems_json([])
+        elsif !options[:parseable]
           Bundler.ui.info(nothing_outdated_message)
         end
       else
-        if options_include_groups
-          relevant_outdated_gems = outdated_gems.group_by {|g| g[:groups] }.sort.flat_map do |groups, gems|
-            contains_group = groups.split(", ").include?(options[:group])
-            next unless options[:groups] || contains_group
-
-            gems
-          end.compact
-
-          if options[:parseable]
-            print_gems(relevant_outdated_gems)
-          else
-            print_gems_table(relevant_outdated_gems)
-          end
+        relevant_outdated_gems = if options_include_groups
+          by_group(outdated_gems, :filter => options[:group])
+        else
+          outdated_gems
+        end
+
+        if options[:json]
+          print_gems_json(relevant_outdated_gems)
         elsif options[:parseable]
-          print_gems(outdated_gems)
+          print_gems(relevant_outdated_gems)
         else
-          print_gems_table(outdated_gems)
+          print_gems_table(relevant_outdated_gems)
         end
 
         exit 1
@@ -162,6 +159,13 @@ def retrieve_active_spec(definition, current_spec)
       active_specs.last
     end
 
+    def by_group(gems, filter: nil)
+      gems.group_by {|g| g[:groups] }.sort.flat_map do |groups_string, grouped_gems|
+        next if filter && !groups_string.split(", ").include?(filter)
+        grouped_gems
+      end.compact
+    end
+
     def print_gems(gems_list)
       gems_list.each do |gem|
         print_gem(
@@ -173,6 +177,21 @@ def print_gems(gems_list)
       end
     end
 
+    def print_gems_json(gems_list)
+      require "json"
+      data = gems_list.map do |gem|
+        gem_data_for(
+          gem[:current_spec],
+          gem[:active_spec],
+          gem[:dependency],
+          gem[:groups]
+        )
+      end
+
+      data = { :outdated_count => gems_list.count, :outdated_gems => data }
+      Bundler.ui.info data.to_json
+    end
+
     def print_gems_table(gems_list)
       data = gems_list.map do |gem|
         gem_column_for(
@@ -212,6 +231,26 @@ def print_gem(current_spec, active_spec, dependency, groups)
       Bundler.ui.info output_message.rstrip
     end
 
+    def gem_data_for(current_spec, active_spec, dependency, groups)
+      {
+        :current_spec => spec_data_for(current_spec),
+        :active_spec => spec_data_for(active_spec),
+        :dependency => dependency&.to_s,
+        :groups => (groups || "").split(", "),
+      }
+    end
+
+    def spec_data_for(spec)
+      {
+        :name => spec.name,
+        :version => spec.version.to_s,
+        :platform => spec.platform,
+        :source => spec.source.to_s,
+        :required_ruby_version => spec.required_ruby_version.to_s,
+        :required_rubygems_version => spec.required_rubygems_version.to_s,
+      }
+    end
+
     def gem_column_for(current_spec, active_spec, dependency, groups)
       current_version = "#{current_spec.version}#{current_spec.git_version}"
       spec_version = "#{active_spec.version}#{active_spec.git_version}"
diff --git a/bundler/spec/bundler/cli_spec.rb b/bundler/spec/bundler/cli_spec.rb
index b752cd7e703a..7acdc496e764 100644
--- a/bundler/spec/bundler/cli_spec.rb
+++ b/bundler/spec/bundler/cli_spec.rb
@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
 require "bundler/cli"
+require "json"
 
 RSpec.describe "bundle executable" do
   it "returns non-zero exit status when passed unrecognized options" do
@@ -154,6 +155,26 @@ def out_with_macos_man_workaround
       end
     end
 
+    context "with --json" do
+      let(:flags) { "--json" }
+
+      it "prints json output data when there are outdated gems" do
+        run_command
+        out_data = JSON.parse(out)
+        expect(out_data.keys).to contain_exactly("outdated_count", "outdated_gems")
+        expect(out_data["outdated_count"]).to eq(1)
+        expect(out_data["outdated_gems"].length).to eq(1)
+
+        gem_data = out_data["outdated_gems"].first
+        expect(gem_data).to include({
+          "current_spec" => hash_including("name" => "rack", "version" => "0.9.1"),
+          "active_spec" => hash_including("name" => "rack", "version" => "1.0.0"),
+          "dependency" => "rack (= 0.9.1)",
+          "groups" => ["default"],
+        })
+      end
+    end
+
     context "with --parseable" do
       let(:flags) { "--parseable" }