diff --git a/composer.json b/composer.json
index ecac924..6d25ccb 100644
--- a/composer.json
+++ b/composer.json
@@ -30,10 +30,10 @@
     "GPL-3.0-or-later"
   ],
   "require": {
-    "php": ">=7.3",
-    "oxid-esales/oxideshop-ce": "6.8 - 6.14",
+    "php": ">=7.1",
+    "oxid-esales/oxideshop-ce": "6.3 - 6.9",
     "pear/net_smtp": "^1.11",
-    "mika56/spfcheck": "^1.1.7|^2.1.1",
+    "mika56/spfcheck": "^1.1.7",
     "beberlei/assert": "^3.3"
   },
   "require-dev": {