diff --git a/.travis.yml b/.travis.yml
index 0b04942..d086531 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,8 +2,6 @@ language: php
 
 matrix:
     include:
-        - php: 5.6
-        - php: 7.0
         - php: 7.1
         - php: 7.2
         - php: 7.3
diff --git a/composer.json b/composer.json
index 18a308a..d02ba04 100644
--- a/composer.json
+++ b/composer.json
@@ -20,11 +20,11 @@
     ],
     "require": {
         "league/oauth2-client": "^2.0",
-        "web-token/jwt-core": "^2.0",
-        "web-token/jwt-signature-algorithm-ecdsa": "^2.0",
-        "web-token/jwt-key-mgmt": "^2.0",
-        "ext-json": "*",
-        "web-token/jwt-signature-algorithm-rsa": "^2.0"
+        "web-token/jwt-core": "^1",
+        "web-token/jwt-signature-algorithm-ecdsa": "^1",
+        "web-token/jwt-key-mgmt": "^1",
+        "web-token/jwt-signature-algorithm-rsa": "^1",
+        "ext-json": "*"
     },
     "require-dev": {
         "phpunit/phpunit": "~4.0",
@@ -44,7 +44,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "1.0.x-dev"
+            "dev-master": "0.1.x-dev"
         }
     }
 }
diff --git a/src/Token/AppleAccessToken.php b/src/Token/AppleAccessToken.php
index bf1bacd..4017412 100644
--- a/src/Token/AppleAccessToken.php
+++ b/src/Token/AppleAccessToken.php
@@ -5,10 +5,7 @@
 use InvalidArgumentException;
 use Jose\Component\Core\AlgorithmManager;
 use Jose\Component\Core\JWKSet;
-use Jose\Component\Core\JWT;
-use Jose\Component\Signature\Algorithm\ES256;
 use Jose\Component\Signature\Algorithm\RS256;
-use Jose\Component\Signature\JWS;
 use Jose\Component\Signature\JWSVerifier;
 use Jose\Component\Signature\Serializer\CompactSerializer;