diff --git a/sqlmesh/core/model/definition.py b/sqlmesh/core/model/definition.py
index d8fc276dd..6ee2d99b4 100644
--- a/sqlmesh/core/model/definition.py
+++ b/sqlmesh/core/model/definition.py
@@ -1045,6 +1045,7 @@ def metadata_hash(self) -> str:
                 str(self.allow_partials),
                 gen(self.session_properties_) if self.session_properties_ else None,
                 str(self.validate_query) if self.validate_query is not None else None,
+                *[gen(g) for g in self.grains],
             ]
 
             for audit_name, audit_args in sorted(self.audits, key=lambda a: a[0]):
diff --git a/sqlmesh/migrations/v0070_include_grains_in_metadata_hash.py b/sqlmesh/migrations/v0070_include_grains_in_metadata_hash.py
new file mode 100644
index 000000000..dc75ac333
--- /dev/null
+++ b/sqlmesh/migrations/v0070_include_grains_in_metadata_hash.py
@@ -0,0 +1,5 @@
+"""Include grains in the metadata hash."""
+
+
+def migrate(state_sync, **kwargs):  # type: ignore
+    pass