diff --git a/composer.json b/composer.json
index 89d4c6a4..2ddb7588 100644
--- a/composer.json
+++ b/composer.json
@@ -25,7 +25,7 @@
 	],
 
 	"require" : {
-		"php" : ">=7.3",
+		"php" : "^7.3",
 		"ext-pdo": "*",
 		"ext-json": "*",
 		"ext-fileinfo": "*",
@@ -47,7 +47,7 @@
     },
 
 	"require-dev" : {
-		"phpunit/phpunit" : "8.*"
+		"phpunit/phpunit" : "^8.0"
 	},
 
 	"suggest": {