diff --git a/Executable/Sources/Colibri.swift b/Executable/Sources/Colibri.swift
index 4359f28..288e88b 100644
--- a/Executable/Sources/Colibri.swift
+++ b/Executable/Sources/Colibri.swift
@@ -9,7 +9,8 @@ struct Colibri: AsyncParsableCommand {
         abstract: "The utility to manage your Hummingbird apps",
         subcommands: [
             Build.self,
-            Create.self
+            Create.self,
+            Outdated.self
         ],
         defaultSubcommand: Create.self
     )
diff --git a/Executable/Sources/Commands/OutdatedCommand.swift b/Executable/Sources/Commands/OutdatedCommand.swift
new file mode 100644
index 0000000..686da2b
--- /dev/null
+++ b/Executable/Sources/Commands/OutdatedCommand.swift
@@ -0,0 +1,29 @@
+import ArgumentParser
+import ColibriLibrary
+
+extension Colibri {
+    struct Outdated: AsyncParsableCommand {
+        
+        // MARK: Properties
+        
+        static let configuration = CommandConfiguration(
+            commandName: "outdated-dependencies",
+            abstract: "Check for outdated package dependencies in a Hummingbird app",
+            helpNames: .shortAndLong,
+            aliases: ["outdated"]
+        )
+        
+        @OptionGroup var options: Options
+        
+        // MARK: Functions
+        
+        mutating func run() async throws {
+            let terminalService = TerminalService()
+            
+            let outdatedDependencies = OutdatedDependenciesTask(terminalService: terminalService)
+            
+            try await outdatedDependencies(at: options.locationURL)
+        }
+
+    }
+}
diff --git a/Executable/Sources/Options/OutdatedOptions.swift b/Executable/Sources/Options/OutdatedOptions.swift
new file mode 100644
index 0000000..ab501b9
--- /dev/null
+++ b/Executable/Sources/Options/OutdatedOptions.swift
@@ -0,0 +1,13 @@
+import ArgumentParser
+import ColibriLibrary
+
+extension Colibri.Outdated {
+    struct Options: ParsableArguments, Locationable {
+        
+        // MARK: Properties
+        
+        @Option(name: .shortAndLong)
+        var location: String?
+        
+    }
+}
diff --git a/Library/Sources/Internal/Extensions/URL+Extensions.swift b/Library/Sources/Internal/Extensions/URL+Extensions.swift
index 01d4ea3..4ab418d 100644
--- a/Library/Sources/Internal/Extensions/URL+Extensions.swift
+++ b/Library/Sources/Internal/Extensions/URL+Extensions.swift
@@ -16,7 +16,7 @@ extension URL {
     
     var pathString: String {
         if #available(macOS 13.0, *) {
-            path(percentEncoded: true)
+            path(percentEncoded: false)
         } else {
             path
         }
diff --git a/Library/Sources/Public/Tasks/OutdatedDependenciesTask.swift b/Library/Sources/Public/Tasks/OutdatedDependenciesTask.swift
new file mode 100644
index 0000000..38a33de
--- /dev/null
+++ b/Library/Sources/Public/Tasks/OutdatedDependenciesTask.swift
@@ -0,0 +1,31 @@
+import Foundation
+
+public struct OutdatedDependenciesTask {
+
+    // MARK: Properties
+    
+    private let terminalService: TerminalServicing
+    
+    // MARK: Initialisers
+    
+    public init(terminalService: TerminalServicing) {
+        self.terminalService = terminalService
+    }
+    
+    // MARK: Functions
+    
+    public func callAsFunction(at location: URL? = nil) async throws (TerminalServiceError) {
+        let executableURL = URL(at: "/usr/bin/swift")
+        
+        var arguments: [String] = ["package", "update"]
+        
+        if let location {
+            arguments.append(contentsOf: ["--package-path", location.pathString])
+        }
+        
+        arguments.append("--dry-run")
+        
+        try await terminalService.run(executableURL, arguments: arguments)
+    }
+    
+}
diff --git a/Test/Sources/Cases/Internal/Extensions/URL+ExtensionsTests.swift b/Test/Sources/Cases/Internal/Extensions/URL+ExtensionsTests.swift
index b5525ea..ac809d5 100644
--- a/Test/Sources/Cases/Internal/Extensions/URL+ExtensionsTests.swift
+++ b/Test/Sources/Cases/Internal/Extensions/URL+ExtensionsTests.swift
@@ -24,8 +24,8 @@ struct URL_ExtensionsTests {
 
     // MARK: Computed tests
     
-    @Test(arguments: zip([URL.someFile, .dotFile, .tildeFile, .someURL],
-                         [String.someFilePath, .dotPath, .tildePath, .empty]))
+    @Test(arguments: zip([URL.someFile, .dotFile, .tildeFile, .someEncodedFile, .someURL],
+                         [String.someFilePath, .dotPath, .tildePath, .someEncodedPath, .empty]))
     func pathString(
         with url: URL,
         expects path: String
@@ -63,6 +63,7 @@ private extension String {
     static let dotPath = "."
     static let empty = ""
     static let tildePath = "~"
+    static let someEncodedPath = "/sömê/páth/fîlê"
     static let someFilePath = "/some/file/path"
 }
 
@@ -70,6 +71,7 @@ private extension String {
 
 private extension URL {
     static let dotFile = URL(at: .dotPath)
+    static let someEncodedFile = URL(at: "/sömê/páth/fîlê")
     static let someFile = URL(at: .someFilePath)
     static let someURL = URL(string: "https://some.url.path")!
     static let tildeFile = URL(at: .tildePath)
diff --git a/Test/Sources/Cases/Public/Tasks/OutdatedDependenciesTaskTests.swift b/Test/Sources/Cases/Public/Tasks/OutdatedDependenciesTaskTests.swift
new file mode 100644
index 0000000..b79a211
--- /dev/null
+++ b/Test/Sources/Cases/Public/Tasks/OutdatedDependenciesTaskTests.swift
@@ -0,0 +1,42 @@
+import Foundation
+import Testing
+
+@testable import ColibriLibrary
+
+struct OutdatedDependenciesTaskTests {
+    
+    @Test(arguments: [nil, URL.someCurrentFolder])
+    func task(at location: URL?) async throws {
+        // GIVEN
+        let terminalService = TerminalServiceSpy()
+        let task = OutdatedDependenciesTask(terminalService: terminalService)
+        
+        // WHEN
+        try await task(at: location)
+        
+        // THEN
+        let executableURL = URL(at: "/usr/bin/swift")
+        let arguments = if let location {
+            ["package", "update", "--package-path", location.pathString, "--dry-run"]
+        } else {
+            ["package", "update", "--dry-run"]
+        }
+        
+        #expect(terminalService.actions.count == 1)
+        #expect(terminalService.actions[0] == .ran(executableURL, arguments))
+    }
+    
+    @Test(arguments: [nil, URL.someCurrentFolder], [TerminalServiceError.unexpected, .output(""), .captured("")])
+    func task(at location: URL?, throws error: TerminalServiceError) async throws {
+        // GIVEN
+        let terminalService = TerminalServiceMock(action: .error(error))
+        let task = BuildProjectTask(terminalService: terminalService)
+        
+        // WHEN
+        // THEN
+        await #expect(throws: error) {
+            try await task(at: location)
+        }
+    }
+    
+}