diff --git a/nbs/src/nixtla_client.ipynb b/nbs/src/nixtla_client.ipynb
index 03149a51..f15664ea 100644
--- a/nbs/src/nixtla_client.ipynb
+++ b/nbs/src/nixtla_client.ipynb
@@ -451,8 +451,8 @@
     "    min_size = ufp.counts_by_id(df, id_col)['counts'].min()\n",
     "    if min_size < model_input_size + model_horizon:\n",
     "        raise ValueError(\n",
-    "            'Your time series data is too short '\n",
-    "            'Please make sure that your each serie contains '\n",
+    "            'Some series are too short. '\n",
+    "            'Please make sure that each serie contains '\n",
     "            f'at least {model_input_size + model_horizon} observations.'\n",
     "        )\n",
     "\n",
diff --git a/nixtla/nixtla_client.py b/nixtla/nixtla_client.py
index 69b28b59..99ced843 100644
--- a/nixtla/nixtla_client.py
+++ b/nixtla/nixtla_client.py
@@ -382,8 +382,8 @@ def _validate_input_size(
     min_size = ufp.counts_by_id(df, id_col)["counts"].min()
     if min_size < model_input_size + model_horizon:
         raise ValueError(
-            "Your time series data is too short "
-            "Please make sure that your each serie contains "
+            "Some series are too short. "
+            "Please make sure that each serie contains "
             f"at least {model_input_size + model_horizon} observations."
         )