diff --git a/composer.json b/composer.json
index 3b34774..2d2cd72 100644
--- a/composer.json
+++ b/composer.json
@@ -11,7 +11,7 @@
     }],
     "require": {
         "php": ">=5.3.2",
-        "hoa/math" : "~0.1"
+        "hoa/math" : "<2.0"
     },
     "require-dev": {
         "atoum/atoum": "~2.0"