diff --git a/ansto_simplon_api/schemas/configuration.py b/ansto_simplon_api/schemas/configuration.py
index 3b5770d..34a4538 100644
--- a/ansto_simplon_api/schemas/configuration.py
+++ b/ansto_simplon_api/schemas/configuration.py
@@ -62,7 +62,7 @@ class ZMQStartMessage(BaseModel):
     pixel_mask_enabled: bool = True
     pixel_size_x: float = 7.5e-05
     pixel_size_y: float = 7.5e-05
-    saturation_value: int | None = 0
+    saturation_value: int | None = 33000  # TODO: check where this value comes from
     sensor_material: str = "Si"
     sensor_thickness: float = 4.5e-04
     series_id: int = 0
diff --git a/ansto_simplon_api/simulate_zmq_stream.py b/ansto_simplon_api/simulate_zmq_stream.py
index 9028ae3..b8c628f 100644
--- a/ansto_simplon_api/simulate_zmq_stream.py
+++ b/ansto_simplon_api/simulate_zmq_stream.py
@@ -148,6 +148,10 @@ def create_list_of_compressed_frames(
             datafile.shape[0] for datafile in datafile_list
         ]
         array_shape = datafile_list[0].shape[1:]
+
+        zmq_start_message.image_size_x = array_shape[1]
+        zmq_start_message.image_size_y = array_shape[0]
+
         dtype = datafile_list[0].dtype
 
         frame_list = []
diff --git a/pyproject.toml b/pyproject.toml
index 1efaa85..4d482a3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "ansto-simplon-api"
-version = "0.2.3"
+version = "0.2.4"
 description = "Simulated simplon api"
 authors = ["Francisco Hernandez Vivanco <hernandf@ansto.gov.au>",
            "Daniel Eriksson <daniele@ansto.gov.au>"]