diff --git a/composer.json b/composer.json
index 9675178..c725e15 100644
--- a/composer.json
+++ b/composer.json
@@ -1,7 +1,7 @@
 {
     "require": {
         "vlucas/phpdotenv": "^5.5",
-        "phpoffice/phpspreadsheet": "3.9.0.0",
+        "phpoffice/phpspreadsheet": "^1.29",
         "seinopsys/postgresql-database-class": "^3.1",
         "justinrainbow/json-schema": "^5.2",
         "econea/nusoap": "^0.9.15",