diff --git a/composer.json b/composer.json
index 954cc28..2763898 100644
--- a/composer.json
+++ b/composer.json
@@ -8,7 +8,7 @@
         "doctrine/annotations": "1.*,>=1.2.0",
         "doctrine/common":      "^2.13.3|^3.0.0",
         "doctrine/orm":         "^2.7.5",
-        "psr/log":              "^1.0.0"
+        "psr/log":              "^1.0.0|^2.0.0|^3.0.0"
     },
     "require-dev": {
         "hostnet/database-test-lib": "^2.0.2",