diff --git a/CommonCrypto/module.modulemap b/CommonCrypto/module.modulemap
deleted file mode 100644
index b70f7d6..0000000
--- a/CommonCrypto/module.modulemap
+++ /dev/null
@@ -1,4 +0,0 @@
-module CommonCrypto [system] {
-    header "shim.h"
-    export *
-}
diff --git a/CommonCrypto/shim.h b/CommonCrypto/shim.h
deleted file mode 100644
index c332624..0000000
--- a/CommonCrypto/shim.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <CommonCrypto/CommonCrypto.h>
diff --git a/Package.swift b/Package.swift
index 5ba29b4..afc4362 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,22 +1,6 @@
 // swift-tools-version:4.0
 
-import PackageDescription
-
-
-#if os(macOS) || os(iOS) || os(watchOS) || os(tvOS)
-let dependencies = [
-  Package.Dependency.package(url: "https://github.com/kylef-archive/CommonCrypto.git", from: "1.0.0"),
-]
-let excludes = ["HMAC/HMACCryptoSwift.swift"]
-let targetDependencies: [Target.Dependency] = []
-#else
-let dependencies = [
-  Package.Dependency.package(url: "https://github.com/krzyzanowskim/CryptoSwift.git", from: "0.8.0"),
-]
-let excludes = ["HMAC/HMACCommonCrypto.swift"]
-let targetDependencies: [Target.Dependency] = ["CryptoSwift"]
-#endif
-
+import PackageDescriptio
 
 let package = Package(
   name: "JWT",
diff --git a/Sources/JWA/HMAC/HMACCommonCrypto.swift b/Sources/JWA/HMAC/HMACCommonCrypto.swift
index 299fd8a..0bf0184 100644
--- a/Sources/JWA/HMAC/HMACCommonCrypto.swift
+++ b/Sources/JWA/HMAC/HMACCommonCrypto.swift
@@ -5,7 +5,7 @@ import CommonCrypto
 extension HMACAlgorithm: SignAlgorithm, VerifyAlgorithm {
   public func sign(_ message: Data) -> Data {
     let context = UnsafeMutablePointer<CCHmacContext>.allocate(capacity: 1)
-    defer { context.deallocate(capacity: 1) }
+    defer {context.deallocate()}
 
     key.withUnsafeBytes() { (buffer: UnsafePointer<UInt8>) in
       CCHmacInit(context, hash.commonCryptoAlgorithm, buffer, size_t(key.count))