1 files changed, 2 insertions, 2 deletions
diff --git a/composer.json b/composer.json
index 8495275..58e6f35 100644
--- a/composer.json
+++ b/composer.json
@@ -26,7 +26,7 @@
     "source":   "https://github.com/paragonie/constant_time_encoding"
   },
   "require": {
-    "php": "^5.5|^7"
+    "php": "^5.3|^7"
   },
   "require-dev": {
     "phpunit/phpunit": "4.*|5.*",
@@ -37,4 +37,4 @@
       "ParagonIE\\ConstantTime\\": "src/"
     }
   }
-}
-\ No newline at end of file
+}