diff --git a/Docs/ProjectSpec.md b/Docs/ProjectSpec.md
index 5fc2f936..6ac82945 100644
--- a/Docs/ProjectSpec.md
+++ b/Docs/ProjectSpec.md
@@ -71,6 +71,9 @@ Note that target names can also be changed by adding a `name` property to a targ
 	- `targets`: only target settings
 	- `none`: no settings are automatically applied
 - ⚪️ **developmentLanguage**: `String` - Sets the development language of the project. Defaults to `en`
+- ⚪️ **usesTabs**: `Bool` - If this is specified, the Xcode project will override the user's setting determining whether or not tabs or spaces should be used in the project.
+- ⚪️ **indentWidth**: `Int` - If this is specified, the Xcode project will override the user's setting for indent width in number of spaces.
+- ⚪️ **tabWidth**: `Int` - If this is specified, the Xcode project will override the user's setting for indent width in number of spaces.
 
 ### Configs
 Each config maps to a build type of either `debug` or `release` which will then apply default build settings to the project. Any value other than `debug` or `release` (for example `none`), will mean no default build settings will be applied to the project.
diff --git a/Sources/ProjectSpec/ProjectSpec.swift b/Sources/ProjectSpec/ProjectSpec.swift
index 7fd50320..92480f69 100644
--- a/Sources/ProjectSpec/ProjectSpec.swift
+++ b/Sources/ProjectSpec/ProjectSpec.swift
@@ -25,6 +25,9 @@ public struct ProjectSpec {
         public var bundleIdPrefix: String?
         public var settingPresets: SettingPresets
         public var developmentLanguage: String?
+        public var usesTabs: Bool?
+        public var tabWidth: Int?
+        public var indentWidth: Int?
 
         public enum SettingPresets: String {
             case all
@@ -47,12 +50,15 @@ public struct ProjectSpec {
             }
         }
 
-        public init(carthageBuildPath: String? = nil, createIntermediateGroups: Bool = false, bundleIdPrefix: String? = nil, settingPresets: SettingPresets = .all, developmentLanguage: String? = nil) {
+        public init(carthageBuildPath: String? = nil, createIntermediateGroups: Bool = false, bundleIdPrefix: String? = nil, settingPresets: SettingPresets = .all, developmentLanguage: String? = nil, indentWidth: Int? = nil, tabWidth: Int? = nil, usesTabs: Bool? = nil) {
             self.carthageBuildPath = carthageBuildPath
             self.createIntermediateGroups = createIntermediateGroups
             self.bundleIdPrefix = bundleIdPrefix
             self.settingPresets = settingPresets
             self.developmentLanguage = developmentLanguage
+            self.tabWidth = tabWidth
+            self.indentWidth = indentWidth
+            self.usesTabs = usesTabs
         }
     }
 
@@ -163,5 +169,8 @@ extension ProjectSpec.Options: JSONObjectConvertible {
         settingPresets = jsonDictionary.json(atKeyPath: "settingPresets") ?? .all
         createIntermediateGroups = jsonDictionary.json(atKeyPath: "createIntermediateGroups") ?? false
         developmentLanguage = jsonDictionary.json(atKeyPath: "developmentLanguage")
+        usesTabs = jsonDictionary.json(atKeyPath: "usesTabs")
+        indentWidth = jsonDictionary.json(atKeyPath: "indentWidth")
+        tabWidth = jsonDictionary.json(atKeyPath: "tabWidth")
     }
 }
diff --git a/Sources/XcodeGenKit/PBXProjGenerator.swift b/Sources/XcodeGenKit/PBXProjGenerator.swift
index 45b466ef..64d13766 100644
--- a/Sources/XcodeGenKit/PBXProjGenerator.swift
+++ b/Sources/XcodeGenKit/PBXProjGenerator.swift
@@ -106,7 +106,7 @@ public class PBXProjGenerator {
             topLevelGroups.insert(rootGroup)
         }
 
-        let mainGroup = PBXGroup(reference: referenceGenerator.generate(PBXGroup.self, "Project"), children: Array(topLevelGroups), sourceTree: .group)
+        let mainGroup = PBXGroup(reference: referenceGenerator.generate(PBXGroup.self, "Project"), children: Array(topLevelGroups), sourceTree: .group, usesTabs: spec.options.usesTabs.map{ $0 ? 1 : 0 }, indentWidth: spec.options.indentWidth, tabWidth: spec.options.tabWidth)
         addObject(mainGroup)
 
         sortGroups(group: mainGroup)
diff --git a/Tests/Fixtures/TestProject/Project.xcodeproj/project.pbxproj b/Tests/Fixtures/TestProject/Project.xcodeproj/project.pbxproj
index e50204ee..95a66a71 100644
--- a/Tests/Fixtures/TestProject/Project.xcodeproj/project.pbxproj
+++ b/Tests/Fixtures/TestProject/Project.xcodeproj/project.pbxproj
@@ -312,7 +312,10 @@
 				G_6651250437419 /* StandaloneFiles */,
 				FR_257073931060 /* ResourceFolder */,
 			);
+			indentWidth = 2;
 			sourceTree = "<group>";
+			tabWidth = 2;
+			usesTabs = 0;
 		};
 		G_8620238527590 /* Products */ = {
 			isa = PBXGroup;
diff --git a/Tests/Fixtures/TestProject/spec.yml b/Tests/Fixtures/TestProject/spec.yml
index eac4dfe2..9877a310 100644
--- a/Tests/Fixtures/TestProject/spec.yml
+++ b/Tests/Fixtures/TestProject/spec.yml
@@ -2,6 +2,9 @@ name: Project
 include: [environments.yml]
 options:
   bundleIdPrefix: com.project
+  usesTabs: false
+  indentWidth: 2
+  tabWidth: 2
 fileGroups:
   - Configs
   - FileGroup