diff --git a/composer.lock b/composer.lock
index d71e5f5b0193fd821e8d120765ed6da4db94b9e1..b70eae7c36c3dd1d5b6ef88f0e564f55e3c33d8e 100644
--- a/composer.lock
+++ b/composer.lock
@@ -260,16 +260,16 @@
         },
         {
             "name": "simplesamlphp/saml2",
-            "version": "v3.1.4",
+            "version": "v3.1.5",
             "source": {
                 "type": "git",
                 "url": "https://github.com/simplesamlphp/saml2.git",
-                "reference": "4f6af7f69f29df8555a18b9bb7b646906b45924d"
+                "reference": "a07885a55fe5d3335ef0913ee9e95a75b34bfc52"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/simplesamlphp/saml2/zipball/4f6af7f69f29df8555a18b9bb7b646906b45924d",
-                "reference": "4f6af7f69f29df8555a18b9bb7b646906b45924d",
+                "url": "https://api.github.com/repos/simplesamlphp/saml2/zipball/a07885a55fe5d3335ef0913ee9e95a75b34bfc52",
+                "reference": "a07885a55fe5d3335ef0913ee9e95a75b34bfc52",
                 "shasum": ""
             },
             "require": {
@@ -283,7 +283,7 @@
             "require-dev": {
                 "mockery/mockery": "~0.9",
                 "phpmd/phpmd": "~1.5",
-                "phpunit/phpunit": "~3.7",
+                "phpunit/phpunit": "~4",
                 "sebastian/phpcpd": "~1.4",
                 "sensiolabs/security-checker": "~1.1",
                 "squizlabs/php_codesniffer": "~1.4"
@@ -291,7 +291,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "v3.0.x-dev"
+                    "dev-master": "v3.1.x-dev"
                 }
             },
             "autoload": {
@@ -313,7 +313,7 @@
                 }
             ],
             "description": "SAML2 PHP library from SimpleSAMLphp",
-            "time": "2018-03-02T14:30:38+00:00"
+            "time": "2018-04-18T04:43:35+00:00"
         },
         {
             "name": "twig/extensions",