diff --git a/.travis.yml b/.travis.yml
index aa8257b..e933fca 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,5 @@
 language: objective-c
-osx_image: xcode7.2
+osx_image: xcode7.3
 script:
 - set -o pipefail
 - git submodule update --init --recursive
diff --git a/Cartfile b/Cartfile
index c22d502..e002d56 100644
--- a/Cartfile
+++ b/Cartfile
@@ -1 +1 @@
-github "krzyzanowskim/CryptoSwift" ~> 0.2.2
+github "krzyzanowskim/CryptoSwift" ~> 0.4.0
diff --git a/Cartfile.resolved b/Cartfile.resolved
index 616e971..3041c75 100644
--- a/Cartfile.resolved
+++ b/Cartfile.resolved
@@ -1 +1 @@
-github "krzyzanowskim/CryptoSwift" "0.2.3"
+github "krzyzanowskim/CryptoSwift" "0.4.0"
diff --git a/Carthage/Checkouts/CryptoSwift b/Carthage/Checkouts/CryptoSwift
index 2e011dd..3a0c315 160000
--- a/Carthage/Checkouts/CryptoSwift
+++ b/Carthage/Checkouts/CryptoSwift
@@ -1 +1 @@
-Subproject commit 2e011dd834bfc82f0fd34b88495459f57e36aa38
+Subproject commit 3a0c3153717070a42971c30cd73d67f6f832f4bc
diff --git a/JSONWebToken.podspec b/JSONWebToken.podspec
index 15a5422..9c9e47d 100644
--- a/JSONWebToken.podspec
+++ b/JSONWebToken.podspec
@@ -11,6 +11,6 @@ Pod::Spec.new do |spec|
   spec.osx.deployment_target = '10.9'
   spec.tvos.deployment_target = '9.0'
   spec.requires_arc = true
-  spec.dependency 'CryptoSwift', '~> 0.2.2'
+  spec.dependency 'CryptoSwift', '~> 0.4.0'
   spec.module_name = 'JWT'
 end