diff --git a/composer-dev.json b/composer-dev.json
index a0b84c78..ef935787 100644
--- a/composer-dev.json
+++ b/composer-dev.json
@@ -21,7 +21,7 @@
     }],
   "require": {
     "php-64bit": ">=7.0",
-    "ext-curl": ">=7.0",
+    "ext-curl": "*",
     "ext-zmq": ">=1.1.3",
     "react/zmq": "0.3.*",
     "monolog/monolog": "1.*",
diff --git a/composer.json b/composer.json
index 086fddf4..a859c312 100644
--- a/composer.json
+++ b/composer.json
@@ -21,7 +21,7 @@
     }],
   "require": {
     "php-64bit": ">=7.0",
-    "ext-curl": ">=7.0",
+    "ext-curl": "*",
     "ext-zmq": ">=1.1.3",
     "react/zmq": "0.3.*",
     "monolog/monolog": "1.*",