diff --git a/.swiftlint.yml b/.swiftlint.yml
index 55fb820..3841c04 100644
--- a/.swiftlint.yml
+++ b/.swiftlint.yml
@@ -1,7 +1,7 @@
 # Source: https://github.com/sindresorhus/swiftlint-sindre (with modifications)
 
 # Rules covered by SwiftFormat are commented out
-whitelist_rules:
+only_rules:
   - anyobject_protocol
   - array_init
   - attributes
@@ -165,3 +165,5 @@ identifier_name:
     - "x2"
     - "y1"
     - "y2"
+opening_brace:
+  allow_multiline_func: true
diff --git a/Glance/Extensions/NSMenuItem.swift b/Glance/Extensions/NSMenuItem.swift
index 7b0ac74..b73b2d5 100644
--- a/Glance/Extensions/NSMenuItem.swift
+++ b/Glance/Extensions/NSMenuItem.swift
@@ -41,9 +41,9 @@ final class ObjectAssociation<T: Any> {
 }
 
 extension NSMenuItem {
-	typealias ActionClosure = ((NSMenuItem) -> Void)
+	typealias ActionClosure = (NSMenuItem) -> Void
 
-	private struct AssociatedKeys {
+	private enum AssociatedKeys {
 		static let onActionClosure = ObjectAssociation<ActionClosure>()
 	}
 
diff --git a/Glance/ViewController.swift b/Glance/ViewController.swift
index b30d4fc..af63e2c 100644
--- a/Glance/ViewController.swift
+++ b/Glance/ViewController.swift
@@ -9,7 +9,7 @@ class ViewController: NSViewController {
 		let supportedFilesWC = SupportedFilesWC(windowNibName: NSNib.Name("SupportedFilesWC"))
 		supportedFilesWC.showWindow(nil)
 	}
-	
+
 	@IBAction private func openGitHubRepository(_: NSButton) {
 		websiteURL.open()
 	}
diff --git a/Mintfile b/Mintfile
index a17f35a..44dea23 100644
--- a/Mintfile
+++ b/Mintfile
@@ -1,2 +1,2 @@
-nicklockwood/SwiftFormat@0.44.7
-realm/SwiftLint@0.39.2
+nicklockwood/SwiftFormat@0.49.9
+realm/SwiftLint@0.47.1
diff --git a/QLPlugin/Utils/HTMLRenderer.swift b/QLPlugin/Utils/HTMLRenderer.swift
index 86a97fc..ee69461 100644
--- a/QLPlugin/Utils/HTMLRenderer.swift
+++ b/QLPlugin/Utils/HTMLRenderer.swift
@@ -24,7 +24,7 @@ extension HTMLRendererError: LocalizedError {
 	}
 }
 
-class HTMLRenderer {
+enum HTMLRenderer {
 	/// Throws an error if the return value indicates one. Because all `HTMLConverter` return values
 	/// are C strings, errors are implemented as return values starting with "error: ".
 	static func throwIfErrored(fileType: String, returnValue: String) throws {
diff --git a/QLPlugin/Views/Previews/TARPreview.swift b/QLPlugin/Views/Previews/TARPreview.swift
index 71a349a..59e197a 100644
--- a/QLPlugin/Views/Previews/TARPreview.swift
+++ b/QLPlugin/Views/Previews/TARPreview.swift
@@ -132,7 +132,8 @@ class TARPreview: Preview {
 	}
 
 	private func parseGZIPSize(lines: String)
-		-> (sizeUncompressed: Int?, compressionRatio: Double?) {
+		-> (sizeUncompressed: Int?, compressionRatio: Double?)
+	{
 		let sizeMatches = lines.matchRegex(regex: sizeRegex)
 		let sizeUncompressed = Int(sizeMatches[0][1])
 		let compressionRatio = Double(sizeMatches[0][2])