diff --git a/README.md b/README.md
index ec10b51..f2fa16c 100644
--- a/README.md
+++ b/README.md
@@ -16,5 +16,5 @@ XMPPHP is an elegant PHP library for XMPP (aka Jabber, Google Talk, etc).
 Requirements
 ------------
 
-* PHP 7.0
+* PHP 7.3 or later
 * SSL Support Compiled
diff --git a/composer.json b/composer.json
index 35a8e66..3e879b3 100644
--- a/composer.json
+++ b/composer.json
@@ -42,7 +42,7 @@
         "psr-4": { "XMPPHP\\": "XMPPHP" }
     },
     "require": {
-        "php": ">=7.0.0",
+        "php": "^7.3.0",
         "ext-mbstring": "*",
         "ext-xml": "*"
     }