diff --git a/Gemfile b/Gemfile
new file mode 100644
index 0000000..4a2f236
--- /dev/null
+++ b/Gemfile
@@ -0,0 +1,3 @@
+source 'https://rubygems.org'
+
+gem 'xcodeproj'
\ No newline at end of file
diff --git a/Gemfile.lock b/Gemfile.lock
new file mode 100644
index 0000000..a8da2d6
--- /dev/null
+++ b/Gemfile.lock
@@ -0,0 +1,23 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    CFPropertyList (3.0.0)
+    atomos (0.1.3)
+    claide (1.0.2)
+    colored2 (3.1.2)
+    nanaimo (0.2.6)
+    xcodeproj (1.8.2)
+      CFPropertyList (>= 2.3.3, < 4.0)
+      atomos (~> 0.1.3)
+      claide (>= 1.0.2, < 2.0)
+      colored2 (~> 3.1)
+      nanaimo (~> 0.2.6)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  xcodeproj
+
+BUNDLED WITH
+   1.16.6
diff --git a/src/extensions/ios-extension.js b/src/extensions/ios-extension.js
index 214e7a2..40cf532 100644
--- a/src/extensions/ios-extension.js
+++ b/src/extensions/ios-extension.js
@@ -5,14 +5,14 @@ module.exports = toolbox => {
     getProjectFilePath: async () => {
       const { print, system, meta } = toolbox
       return new Promise((resolve, reject) => {
-        system.run(`ruby ${meta.src}/ios.rb get_project_path`)
+        system.run(`BUNDLE_GEMFILE=${meta.src}/../Gemfile bundle exec ruby ${meta.src}/ios.rb get_project_path`)
         resolve()
       })
     },
     addBuildConfigurations: async (teamId) => {
       const { print, system, meta } = toolbox
       return new Promise((resolve, reject) => {
-        system.run(`ruby ${meta.src}/ios.rb make_new_build_configurations ${teamId}`)
+        system.run(`BUNDLE_GEMFILE=${meta.src}/../Gemfile bundle exec ruby ${meta.src}/ios.rb make_new_build_configurations ${teamId}`)
         resolve()
       })
     },
@@ -22,7 +22,7 @@ module.exports = toolbox => {
         // FIXME: there is some race condition going on here.
         // without setTimeout here, it won't be applied :shrug:
         setTimeout(() => {
-          system.run(`ruby ${meta.src}/ios.rb add_bundle_id_suffixes`)
+          system.run(`BUNDLE_GEMFILE=${meta.src}/../Gemfile bundle exec ruby ${meta.src}/ios.rb add_bundle_id_suffixes`)
           resolve()
         }, 200)
       })
@@ -30,7 +30,7 @@ module.exports = toolbox => {
     addSchemes: async () => {
       const { print, system, meta } = toolbox
       return new Promise((resolve, reject) => {
-        system.run(`ruby ${meta.src}/ios.rb add_schemes`)
+        system.run(`BUNDLE_GEMFILE=${meta.src}/../Gemfile bundle exec ruby ${meta.src}/ios.rb add_schemes`)
         resolve()
       })
     },