diff --git a/build/src/VersionParser.php b/build/src/VersionParser.php
index 832fc09..5d14b7b 100644
--- a/build/src/VersionParser.php
+++ b/build/src/VersionParser.php
@@ -26,6 +26,9 @@ public static function generateExplicitConstraint($version, $isCore) {
 
   public static function handleCore($version) {
     list($major, $minor) = explode('.', $version);
+    if ($major == '7') {
+      return ">=$major,<$version";
+    }
     return ">=$major.$minor,<$version";
   }