diff --git a/DockProgress.xcodeproj/project.pbxproj b/DockProgress.xcodeproj/project.pbxproj
index 8426183..4b74a2a 100644
--- a/DockProgress.xcodeproj/project.pbxproj
+++ b/DockProgress.xcodeproj/project.pbxproj
@@ -312,7 +312,7 @@
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
 				ENABLE_NS_ASSERTIONS = YES;
 				GCC_OPTIMIZATION_LEVEL = 0;
-				MACOSX_DEPLOYMENT_TARGET = 10.10;
+				MACOSX_DEPLOYMENT_TARGET = 10.12;
 				ONLY_ACTIVE_ARCH = YES;
 				OTHER_SWIFT_FLAGS = "-DXcode";
 				PRODUCT_NAME = "$(TARGET_NAME)";
@@ -321,6 +321,7 @@
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = SWIFT_PACKAGE;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
 				USE_HEADERMAP = NO;
+				VALID_ARCHS = x86_64;
 			};
 			name = Debug;
 		};
@@ -377,7 +378,7 @@
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
 				GCC_OPTIMIZATION_LEVEL = s;
-				MACOSX_DEPLOYMENT_TARGET = 10.10;
+				MACOSX_DEPLOYMENT_TARGET = 10.12;
 				OTHER_SWIFT_FLAGS = "-DXcode";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SDKROOT = macosx;
@@ -385,6 +386,7 @@
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = SWIFT_PACKAGE;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
 				USE_HEADERMAP = NO;
+				VALID_ARCHS = x86_64;
 			};
 			name = Release;
 		};
diff --git a/Package.swift b/Package.swift
index c5aeb4c..27c18af 100644
--- a/Package.swift
+++ b/Package.swift
@@ -6,13 +6,15 @@ let package = Package(
     products: [
         .library(
             name: "DockProgress",
-            targets: ["DockProgress"]),
+            targets: ["DockProgress"]
+		)
     ],
     targets: [
         .target(
             name: "DockProgress"
         .testTarget(
             name: "DockProgressTests",
-            dependencies: ["DockProgress"]),
+            dependencies: ["DockProgress"]
+		)
     ]
 )
diff --git a/Sources/DockProgress/DockProgress.swift b/Sources/DockProgress/DockProgress.swift
index bc2cd2e..083fed1 100644
--- a/Sources/DockProgress/DockProgress.swift
+++ b/Sources/DockProgress/DockProgress.swift
@@ -82,7 +82,7 @@ public final class DockProgress {
 		roundedRect(barInnerBg)
 
 		var barProgress = bar.insetBy(dx: 1, dy: 1)
-		barProgress.size.width = barProgress.width * CGFloat(self.progressValue)
+		barProgress.size.width = barProgress.width * CGFloat(progressValue)
 		NSColor.white.set()
 		roundedRect(barProgress)
 	}
diff --git a/readme.md b/readme.md
index 6491e67..1b857e5 100644
--- a/readme.md
+++ b/readme.md
@@ -4,7 +4,7 @@
 
 <img src="screenshot.gif" width="485">
 
-This package is used in production by the [Gifski app](https://github.com/sindresorhus/gifski-app).
+This package is used in production by the [Gifski app](https://github.com/sindresorhus/gifski-app). You might also like some of my [other apps](https://sindresorhus.com/#apps).
 
 
 ## Requirements
@@ -28,6 +28,10 @@ With [Carthage](https://swift.org/package-manager/):
 github "sindresorhus/DockProgress"
 ```
 
+<a href="https://www.patreon.com/sindresorhus">
+	<img src="https://c5.patreon.com/external/logo/become_a_patron_button@2x.png" width="160">
+</a>
+
 
 ## Usage
 
@@ -37,7 +41,7 @@ github "sindresorhus/DockProgress"
 import Cocoa
 import DockProgress
 
-foo.onUpdate = { progress
+foo.onUpdate = { progress in
 	DockProgress.progressValue = progress
 }
 ```