diff --git a/Classes/VideoRenderer.swift b/Classes/VideoRenderer.swift
index 40459e6..03b9780 100644
--- a/Classes/VideoRenderer.swift
+++ b/Classes/VideoRenderer.swift
@@ -86,7 +86,7 @@ public class VideoRenderer {
     
         var assetWriter: AVAssetWriter
         do {
-            assetWriter = try AVAssetWriter(outputURL: url, fileType: .m4v)
+            assetWriter = try AVAssetWriter(outputURL: url, fileType: AVFileType.m4v)
         } catch {
             assert(false, error.localizedDescription)
             return
@@ -98,7 +98,7 @@ public class VideoRenderer {
             AVVideoHeightKey: videoSize.height
         ]
     
-        let input = AVAssetWriterInput(mediaType: .video, outputSettings: settings)
+        let input = AVAssetWriterInput(mediaType: AVMediaType.video, outputSettings: settings)
         // input.expectsMediaDataInRealTime = false
         assetWriter.add(input)
         
diff --git a/SceneKit2Video.xcodeproj/project.pbxproj b/SceneKit2Video.xcodeproj/project.pbxproj
index ac9f0df..a8c7768 100644
--- a/SceneKit2Video.xcodeproj/project.pbxproj
+++ b/SceneKit2Video.xcodeproj/project.pbxproj
@@ -304,7 +304,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = net.colordeaf.SceneKit2Video;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 4.0;
 			};
 			name = Debug;
 		};
@@ -316,7 +316,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = net.colordeaf.SceneKit2Video;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 4.0;
 			};
 			name = Release;
 		};