diff --git a/composer.json b/composer.json
index 26c44346..7cb1ca18 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,7 @@
         "php": "^7.1",
         "amphp/amp": "^2.0.3",
         "lcobucci/clock": "^1.0",
-        "psr/log": "^1.0"
+        "psr/log": "1.*"
     },
     "autoload": {
         "psr-4": {