diff --git a/Mac/MainWindow/Detail/DetailWebViewController.swift b/Mac/MainWindow/Detail/DetailWebViewController.swift
index a203600f5..9e889db4b 100644
--- a/Mac/MainWindow/Detail/DetailWebViewController.swift
+++ b/Mac/MainWindow/Detail/DetailWebViewController.swift
@@ -30,17 +30,10 @@ final class DetailWebViewController: NSViewController, WKUIDelegate {
 
 	private var webInspectorEnabled: Bool {
 		get {
-			if let webView = webView {
-				let val: NSNumber? = webView.configuration.preferences.value(forKey: "developerExtrasEnabled") as? NSNumber
-				return val != nil ? val!.boolValue : false
-			}
-
-			return false
+			return webView.configuration.preferences._developerExtrasEnabled
 		}
 		set {
-			if let webView = webView {
-				webView.configuration.preferences.setValue(newValue, forKey: "developerExtrasEnabled")
-			}
+			webView.configuration.preferences._developerExtrasEnabled = newValue
 		}
 	}
 	
diff --git a/Mac/NetNewsWire-Bridging-Header.h b/Mac/NetNewsWire-Bridging-Header.h
new file mode 100644
index 000000000..3f547bcf1
--- /dev/null
+++ b/Mac/NetNewsWire-Bridging-Header.h
@@ -0,0 +1,9 @@
+//
+//  NetNewsWire-Bridging-Header.h
+//  NetNewsWire
+//
+//  Created by Nate Weaver on 2019-09-17.
+//  Copyright © 2019 Ranchero Software. All rights reserved.
+//
+
+#import "WKPreferencesPrivate.h"
diff --git a/Mac/WKPreferencesPrivate.h b/Mac/WKPreferencesPrivate.h
new file mode 100644
index 000000000..232e10fc1
--- /dev/null
+++ b/Mac/WKPreferencesPrivate.h
@@ -0,0 +1,15 @@
+//
+//  WKPreferencesPrivate.h
+//  NetNewsWire
+//
+//  Created by Nate Weaver on 2019-09-17.
+//  Copyright © 2019 Ranchero Software. All rights reserved.
+//
+
+#import <WebKit/WebKit.h>
+
+@interface WKPreferences (Private)
+
+@property (nonatomic, setter=_setDeveloperExtrasEnabled:) BOOL _developerExtrasEnabled API_AVAILABLE(macos(10.11), ios(9.0));
+
+@end
diff --git a/NetNewsWire.xcodeproj/project.pbxproj b/NetNewsWire.xcodeproj/project.pbxproj
index 9cedff112..d7a7360bd 100644
--- a/NetNewsWire.xcodeproj/project.pbxproj
+++ b/NetNewsWire.xcodeproj/project.pbxproj
@@ -917,6 +917,8 @@
 		84F9EAE4213660A100CF2DE4 /* Info.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		84FB9A2D1EDCD6B8003D53B9 /* Sparkle.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = Sparkle.framework; path = Frameworks/Vendor/Sparkle.framework; sourceTree = SOURCE_ROOT; };
 		84FF69B01FC3793300DC198E /* FaviconURLFinder.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FaviconURLFinder.swift; sourceTree = "<group>"; };
+		B24EFD482330FF99006C6242 /* NetNewsWire-Bridging-Header.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = "NetNewsWire-Bridging-Header.h"; sourceTree = "<group>"; };
+		B24EFD5923310109006C6242 /* WKPreferencesPrivate.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WKPreferencesPrivate.h; sourceTree = "<group>"; };
 		D553737C20186C1F006D8857 /* Article+Scriptability.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "Article+Scriptability.swift"; sourceTree = "<group>"; };
 		D57BE6DF204CD35F00D11AAC /* NSScriptCommand+NetNewsWire.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "NSScriptCommand+NetNewsWire.swift"; sourceTree = "<group>"; };
 		D5907CDC2002F0BE005947E5 /* NetNewsWire_project_release.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = NetNewsWire_project_release.xcconfig; sourceTree = "<group>"; };
@@ -1585,6 +1587,8 @@
 				6581C73620CED60100F4AD34 /* SafariExtension */,
 				84C9FC8322629E8F00D921D6 /* Resources */,
 				84FB9A2C1EDCD6A4003D53B9 /* Frameworks */,
+				B24EFD482330FF99006C6242 /* NetNewsWire-Bridging-Header.h */,
+				B24EFD5923310109006C6242 /* WKPreferencesPrivate.h */,
 			);
 			path = Mac;
 			sourceTree = "<group>";
@@ -3087,6 +3091,7 @@
 				MACOSX_DEPLOYMENT_TARGET = 10.14.4;
 				PRODUCT_BUNDLE_IDENTIFIER = "com.ranchero.NetNewsWire-Evergreen";
 				PRODUCT_NAME = NetNewsWire;
+				SWIFT_OBJC_BRIDGING_HEADER = "Mac/NetNewsWire-Bridging-Header.h";
 			};
 			name = Debug;
 		};
@@ -3102,6 +3107,7 @@
 				MACOSX_DEPLOYMENT_TARGET = 10.14.4;
 				PRODUCT_BUNDLE_IDENTIFIER = "com.ranchero.NetNewsWire-Evergreen";
 				PRODUCT_NAME = NetNewsWire;
+				SWIFT_OBJC_BRIDGING_HEADER = "Mac/NetNewsWire-Bridging-Header.h";
 			};
 			name = Release;
 		};