diff --git a/src/data_processors/dataset_simulator/config.vsh.yaml b/src/data_processors/dataset_simulator/config.vsh.yaml
index a9a56a3..f8e8860 100644
--- a/src/data_processors/dataset_simulator/config.vsh.yaml
+++ b/src/data_processors/dataset_simulator/config.vsh.yaml
@@ -32,8 +32,8 @@ argument_groups:
         default: 1.0
       - name: "--n_obs"
         type: integer
-        description: Number of spatial observations to generate. Default value is 100.
-        default: 100
+        description: Number of spatial observations to generate. Default value is 1000.
+        default: 1000
       - name: "--cell_lb"
         type: integer
         description: Lower bound for number of cells at each spot. Default value is 10.
diff --git a/src/data_processors/dataset_simulator/script.py b/src/data_processors/dataset_simulator/script.py
index 115cbea..3294437 100644
--- a/src/data_processors/dataset_simulator/script.py
+++ b/src/data_processors/dataset_simulator/script.py
@@ -55,9 +55,9 @@ def generate_synthetic_dataset(
     cell_ub: int
         upper bound for number of cells at each spot. Default value is 30.
     umi_lb: int
-        lower bound for number of UMIs at each spot. Default value is 10.
+        lower bound for number of UMIs at each spot. Default value is 1000.
     umi_ub: int
-        upper bound for number of UMIs at each spot. Default value is 30.
+        upper bound for number of UMIs at each spot. Default value is 5000.
 
     Returns
     -------