diff --git a/loopy/version.py b/loopy/version.py
index 7de2d687794358f182776b90752ceb81ee2675e4..b3505973bbfecf229e5675565eca9a609a23b49f 100644
--- a/loopy/version.py
+++ b/loopy/version.py
@@ -32,4 +32,4 @@ except ImportError:
 else:
     _islpy_version = islpy.version.VERSION_TEXT
 
-DATA_MODEL_VERSION = "v50-islpy%s" % _islpy_version
+DATA_MODEL_VERSION = "v51-islpy%s" % _islpy_version