diff --git a/.travis.yml b/.travis.yml
index c11c0d7..f03d8c1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,6 +5,7 @@ php:
   - '7.2'
   - '7.3'
   - '7.4'
+  - '8.0'
 
 sudo: required
 
diff --git a/composer.json b/composer.json
index 2511d44..f78f31e 100644
--- a/composer.json
+++ b/composer.json
@@ -18,8 +18,8 @@
     }
   },
   "require": {
-    "php": "~7.1",
-    "guzzlehttp/guzzle": "~6.0|~7.0"
+    "php": "^7.1|^8.0",
+    "guzzlehttp/guzzle": "^6.0|^7.0"
   },
   "bin": [
     "bin/ccat_linux",