diff --git a/XLPagerTabStrip.xcodeproj/project.pbxproj b/XLPagerTabStrip.xcodeproj/project.pbxproj
index 99e72f98..0220bcdd 100644
--- a/XLPagerTabStrip.xcodeproj/project.pbxproj
+++ b/XLPagerTabStrip.xcodeproj/project.pbxproj
@@ -7,6 +7,7 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		0561D7942A82F21200A4B0CB /* UIWindow+Pager.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0561D7932A82F21200A4B0CB /* UIWindow+Pager.swift */; };
 		281BFDC11C511C420090C26F /* IndicatorInfo.swift in Sources */ = {isa = PBXBuildFile; fileRef = 281BFDC01C511C420090C26F /* IndicatorInfo.swift */; };
 		281BFDC31C511F120090C26F /* PagerTabStripBehaviour.swift in Sources */ = {isa = PBXBuildFile; fileRef = 281BFDC21C511F120090C26F /* PagerTabStripBehaviour.swift */; };
 		287D0A6E1C4B73BD004566D6 /* XLPagerTabStripTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 287D0A6D1C4B73BD004566D6 /* XLPagerTabStripTests.swift */; };
@@ -39,6 +40,7 @@
 /* End PBXContainerItemProxy section */
 
 /* Begin PBXFileReference section */
+		0561D7932A82F21200A4B0CB /* UIWindow+Pager.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "UIWindow+Pager.swift"; sourceTree = "<group>"; };
 		281BFDC01C511C420090C26F /* IndicatorInfo.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = IndicatorInfo.swift; sourceTree = "<group>"; };
 		281BFDC21C511F120090C26F /* PagerTabStripBehaviour.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = PagerTabStripBehaviour.swift; sourceTree = "<group>"; };
 		287D0A6D1C4B73BD004566D6 /* XLPagerTabStripTests.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = XLPagerTabStripTests.swift; path = Tests/XLPagerTabStripTests.swift; sourceTree = SOURCE_ROOT; };
@@ -83,6 +85,14 @@
 /* End PBXFrameworksBuildPhase section */
 
 /* Begin PBXGroup section */
+		0561D7952A82F21600A4B0CB /* Extensions */ = {
+			isa = PBXGroup;
+			children = (
+				0561D7932A82F21200A4B0CB /* UIWindow+Pager.swift */,
+			);
+			name = Extensions;
+			sourceTree = "<group>";
+		};
 		281BFDBE1C511B890090C26F /* Views */ = {
 			isa = PBXGroup;
 			children = (
@@ -151,6 +161,7 @@
 				3174BB1628E2C46A00847CF0 /* Resources */,
 				281BFDBF1C511B9A0090C26F /* Controllers */,
 				281BFDBE1C511B890090C26F /* Views */,
+				0561D7952A82F21600A4B0CB /* Extensions */,
 				28E098BD1C5002D90083B788 /* PagerTabStripError.swift */,
 				28E098BF1C5003130083B788 /* SwipeDirection.swift */,
 				281BFDC01C511C420090C26F /* IndicatorInfo.swift */,
@@ -320,6 +331,7 @@
 				28E098BE1C5002D90083B788 /* PagerTabStripError.swift in Sources */,
 				281BFDC11C511C420090C26F /* IndicatorInfo.swift in Sources */,
 				CB86ED6B1C4D6E6C00DA463B /* PagerTabStripViewController.swift in Sources */,
+				0561D7942A82F21200A4B0CB /* UIWindow+Pager.swift in Sources */,
 				28E098C01C5003130083B788 /* SwipeDirection.swift in Sources */,
 				CB0986C81C5158A000DF7087 /* ButtonBarViewCell.swift in Sources */,
 				CB0986C41C51391600DF7087 /* ButtonBarPagerTabStripViewController.swift in Sources */,