diff --git a/MoeStreamer.xcodeproj/project.pbxproj b/MoeStreamer.xcodeproj/project.pbxproj
index 0205e7c..c816624 100644
--- a/MoeStreamer.xcodeproj/project.pbxproj
+++ b/MoeStreamer.xcodeproj/project.pbxproj
@@ -673,7 +673,7 @@
 					"@executable_path/../Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 10.15;
-				MARKETING_VERSION = 0.17.8;
+				MARKETING_VERSION = 0.17.9;
 				PRODUCT_BUNDLE_IDENTIFIER = com.zhiayang.MoeStreamer;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OBJC_BRIDGING_HEADER = "";
@@ -708,7 +708,7 @@
 					"@executable_path/../Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 10.15;
-				MARKETING_VERSION = 0.17.8;
+				MARKETING_VERSION = 0.17.9;
 				PRODUCT_BUNDLE_IDENTIFIER = com.zhiayang.MoeStreamer;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OBJC_BRIDGING_HEADER = "";
diff --git a/MoeStreamer/src/ui/ViewController.swift b/MoeStreamer/src/ui/ViewController.swift
index 3576de5..63ec68e 100644
--- a/MoeStreamer/src/ui/ViewController.swift
+++ b/MoeStreamer/src/ui/ViewController.swift
@@ -128,7 +128,7 @@ class ViewController : NSObject, NSPopoverDelegate
 		popover.behavior = .transient
 		popover.delegate = self
 
-		if #available(macOS 11.0, *)
+		if #unavailable(macOS 11.0)
 		{
 			popover.keydownHandler = { (event) in
 				switch event.characters?.first?.asciiValue