diff --git a/docs/tutorials/01_create_accelerator.py b/docs/tutorials/01_create_accelerator.py
index 0717289..5af33f8 100644
--- a/docs/tutorials/01_create_accelerator.py
+++ b/docs/tutorials/01_create_accelerator.py
@@ -139,7 +139,7 @@
     "facility": "pyAML test facility",
     "machine": "pyaml test machine",
     "data_folder": None,
-    "energy": None,
+    "energy": 1e9,
     "simulators": [
         {
             "type": "pyaml.lattice.simulator",