diff --git a/sdk/boards/bancha.json b/sdk/boards/bancha.json
index 7716a26..013adef 100644
--- a/sdk/boards/bancha.json
+++ b/sdk/boards/bancha.json
@@ -100,6 +100,6 @@
     "tickrate_hz" : 10,
     "revoker" : "software",
     "stack_high_water_mark" : true,
-    "simulator" : "cheriot_sim",
+    "run_command" : "cheriot_sim",
     "simulation": true
 }
diff --git a/sdk/boards/sencha.json b/sdk/boards/sencha.json
index c70a59e..dfd82ef 100644
--- a/sdk/boards/sencha.json
+++ b/sdk/boards/sencha.json
@@ -98,6 +98,6 @@
     "tickrate_hz" : 10,
     "revoker" : "software",
     "stack_high_water_mark" : true,
-    "simulator" : "cheriot_sim",
+    "run_command" : "cheriot_sim",
     "simulation": true
 }