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-rw-r--r--composer.json2
1 files changed, 1 insertions, 1 deletions
diff --git a/composer.json b/composer.json
index daabc8f..2588fb9 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,7 @@
"require": {
"php": "^7.0",
"phpunit/phpunit": "^6.0",
- "symfony/yaml": "^3.0",
+ "symfony/yaml": "^3.0 || ^4.0",
"ext-pdo": "*",
"ext-simplexml": "*"
},