diff --git a/Sources/ShellOut.swift b/Sources/ShellOut.swift
index 290b9d0..ab69462 100644
--- a/Sources/ShellOut.swift
+++ b/Sources/ShellOut.swift
@@ -15,6 +15,8 @@ import Dispatch
  *  - parameter command: The command to run
  *  - parameter arguments: The arguments to pass to the command
  *  - parameter path: The path to execute the commands at (defaults to current folder)
+ *  - parameter inputHandle: Any `FileHandle` that any input (STDIN) should be redirected to
+ *              (at the moment this is only supported on macOS)
  *  - parameter outputHandle: Any `FileHandle` that any output (STDOUT) should be redirected to
  *              (at the moment this is only supported on macOS)
  *  - parameter errorHandle: Any `FileHandle` that any error output (STDERR) should be redirected to
@@ -29,11 +31,12 @@ import Dispatch
 @discardableResult public func shellOut(to command: String,
                                         arguments: [String] = [],
                                         at path: String = ".",
+                                        inputHandle: FileHandle? = nil,
                                         outputHandle: FileHandle? = nil,
                                         errorHandle: FileHandle? = nil) throws -> String {
     let process = Process()
     let command = "cd \(path.escapingSpaces) && \(command) \(arguments.joined(separator: " "))"
-    return try process.launchBash(with: command, outputHandle: outputHandle, errorHandle: errorHandle)
+    return try process.launchBash(with: command, inputHandle: inputHandle, outputHandle: outputHandle, errorHandle: errorHandle)
 }
 
 /**
@@ -41,6 +44,8 @@ import Dispatch
  *
  *  - parameter commands: The commands to run
  *  - parameter path: The path to execute the commands at (defaults to current folder)
+ *  - parameter inputHandle: Any `FileHandle` that any input (STDIN) should be redirected to
+ *              (at the moment this is only supported on macOS)
  *  - parameter outputHandle: Any `FileHandle` that any output (STDOUT) should be redirected to
  *              (at the moment this is only supported on macOS)
  *  - parameter errorHandle: Any `FileHandle` that any error output (STDERR) should be redirected to
@@ -54,10 +59,11 @@ import Dispatch
  */
 @discardableResult public func shellOut(to commands: [String],
                                         at path: String = ".",
+                                        inputHandle: FileHandle? = nil,
                                         outputHandle: FileHandle? = nil,
                                         errorHandle: FileHandle? = nil) throws -> String {
     let command = commands.joined(separator: " && ")
-    return try shellOut(to: command, at: path, outputHandle: outputHandle, errorHandle: errorHandle)
+    return try shellOut(to: command, at: path, inputHandle: inputHandle, outputHandle: outputHandle, errorHandle: errorHandle)
 }
 
 /**
@@ -65,6 +71,7 @@ import Dispatch
  *
  *  - parameter command: The command to run
  *  - parameter path: The path to execute the commands at (defaults to current folder)
+ *  - parameter inputHandle: Any `FileHandle` that any input (STDIN) should be redirected to
  *  - parameter outputHandle: Any `FileHandle` that any output (STDOUT) should be redirected to
  *  - parameter errorHandle: Any `FileHandle` that any error output (STDERR) should be redirected to
  *
@@ -78,9 +85,10 @@ import Dispatch
  */
 @discardableResult public func shellOut(to command: ShellOutCommand,
                                         at path: String = ".",
+                                        inputHandle: FileHandle? = nil,
                                         outputHandle: FileHandle? = nil,
                                         errorHandle: FileHandle? = nil) throws -> String {
-    return try shellOut(to: command.string, at: path, outputHandle: outputHandle, errorHandle: errorHandle)
+    return try shellOut(to: command.string, at: path, inputHandle: inputHandle, outputHandle: outputHandle, errorHandle: errorHandle)
 }
 
 /// Structure used to pre-define commands for use with ShellOut
@@ -346,7 +354,7 @@ extension ShellOutError: LocalizedError {
 // MARK: - Private
 
 private extension Process {
-    @discardableResult func launchBash(with command: String, outputHandle: FileHandle? = nil, errorHandle: FileHandle? = nil) throws -> String {
+    @discardableResult func launchBash(with command: String, inputHandle: FileHandle? = nil, outputHandle: FileHandle? = nil, errorHandle: FileHandle? = nil) throws -> String {
         launchPath = "/bin/bash"
         arguments = ["-c", command]
 
@@ -359,12 +367,15 @@ private extension Process {
         var outputData = Data()
         var errorData = Data()
 
+        standardInput = inputHandle
+
         let outputPipe = Pipe()
         standardOutput = outputPipe
 
         let errorPipe = Pipe()
         standardError = errorPipe
 
+
         #if !os(Linux)
         outputPipe.fileHandleForReading.readabilityHandler = { handler in
             outputQueue.async {
diff --git a/Tests/ShellOutTests/ShellOutTests.swift b/Tests/ShellOutTests/ShellOutTests.swift
index 90a8fd3..fc5b39f 100644
--- a/Tests/ShellOutTests/ShellOutTests.swift
+++ b/Tests/ShellOutTests/ShellOutTests.swift
@@ -13,6 +13,17 @@ class ShellOutTests: XCTestCase {
         XCTAssertTrue(uptime.contains("load average"))
     }
 
+    func testWithInputData() throws {
+        let pipe = Pipe()
+
+        // echo "Hello world"
+        let _ = try shellOut(to: "echo", arguments: ["Hello world"], outputHandle: pipe.fileHandleForWriting)
+
+        // simulate `echo "Hello world" | cat`
+        let cat = try shellOut(to: "cat", inputHandle: pipe.fileHandleForReading)
+        XCTAssertEqual(cat, "Hello world")
+    }
+
     func testWithArguments() throws {
         let echo = try shellOut(to: "echo", arguments: ["Hello world"])
         XCTAssertEqual(echo, "Hello world")