diff --git a/.travis.yml b/.travis.yml
index c108463..7cb8806 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,13 +4,13 @@ sudo: false
 
 matrix:
   include:
-    - php: "7.1.28"
+    - php: "7.1.29"
       env: PSR7="Slim"
-    - php: "7.1.28"
+    - php: "7.1.29"
       env: PSR7="Nyholm"
-    - php: "7.1.28"
+    - php: "7.1.29"
       env: PSR7="Guzzle"
-    - php: "7.1.28"
+    - php: "7.1.29"
       env: PSR7="Zend"
 
 before_install:
diff --git a/composer.json b/composer.json
index b1a4fe8..927dee3 100644
--- a/composer.json
+++ b/composer.json
@@ -10,7 +10,7 @@
   ],
   "require": {
     "ext-json": "*",
-    "slim/slim": "4.0.0-alpha"
+    "slim/slim": "4.0.0-beta"
   },
   "require-dev": {
     "phpunit/phpunit": "^7.5",