diff --git a/crates/nu_plugin_polars/Cargo.toml b/crates/nu_plugin_polars/Cargo.toml
index 2590e63358..1b91d0d760 100644
--- a/crates/nu_plugin_polars/Cargo.toml
+++ b/crates/nu_plugin_polars/Cargo.toml
@@ -54,6 +54,7 @@ url.workspace = true
 [dependencies.polars]
 features = [
     "arg_where",
+    "bigidx",
     "checked_arithmetic",
     "cloud",
     "concat_str",
diff --git a/crates/nu_plugin_polars/src/dataframe/command/data/first.rs b/crates/nu_plugin_polars/src/dataframe/command/data/first.rs
index ca5205ff6a..552b173e5c 100644
--- a/crates/nu_plugin_polars/src/dataframe/command/data/first.rs
+++ b/crates/nu_plugin_polars/src/dataframe/command/data/first.rs
@@ -137,7 +137,7 @@ fn command_lazy(
     call: &EvaluatedCall,
     lazy: NuLazyFrame,
 ) -> Result<PipelineData, ShellError> {
-    let rows: Option<u32> = call.opt(0)?;
+    let rows: Option<u64> = call.opt(0)?;
     let rows = rows.unwrap_or(1);
 
     let res: NuLazyFrame = lazy.to_polars().limit(rows).into();
diff --git a/crates/nu_plugin_polars/src/dataframe/command/data/last.rs b/crates/nu_plugin_polars/src/dataframe/command/data/last.rs
index 43e4fbc232..694cbfd266 100644
--- a/crates/nu_plugin_polars/src/dataframe/command/data/last.rs
+++ b/crates/nu_plugin_polars/src/dataframe/command/data/last.rs
@@ -111,8 +111,8 @@ fn command_lazy(
     call: &EvaluatedCall,
     lazy: NuLazyFrame,
 ) -> Result<PipelineData, ShellError> {
-    let rows: Option<u32> = call.opt(0)?;
-    let rows = rows.unwrap_or(DEFAULT_ROWS as u32);
+    let rows: Option<u64> = call.opt(0)?;
+    let rows = rows.unwrap_or(DEFAULT_ROWS as u64);
 
     let res: NuLazyFrame = lazy.to_polars().tail(rows).into();
 
diff --git a/crates/nu_plugin_polars/src/dataframe/command/data/take.rs b/crates/nu_plugin_polars/src/dataframe/command/data/take.rs
index e6c3c3c9b6..368c6337b2 100644
--- a/crates/nu_plugin_polars/src/dataframe/command/data/take.rs
+++ b/crates/nu_plugin_polars/src/dataframe/command/data/take.rs
@@ -106,7 +106,7 @@ fn command(
 
     let casted = match index.dtype() {
         DataType::UInt32 | DataType::UInt64 | DataType::Int32 | DataType::Int64 => index
-            .cast(&DataType::UInt32)
+            .cast(&DataType::UInt64)
             .map_err(|e| ShellError::GenericError {
                 error: "Error casting index list".into(),
                 msg: e.to_string(),
@@ -123,7 +123,7 @@ fn command(
         }),
     }?;
 
-    let indices = casted.u32().map_err(|e| ShellError::GenericError {
+    let indices = casted.u64().map_err(|e| ShellError::GenericError {
         error: "Error casting index list".into(),
         msg: e.to_string(),
         span: Some(index_span),
diff --git a/crates/nu_plugin_polars/src/dataframe/command/index/set_with_idx.rs b/crates/nu_plugin_polars/src/dataframe/command/index/set_with_idx.rs
index ff128b0796..06f64b4271 100644
--- a/crates/nu_plugin_polars/src/dataframe/command/index/set_with_idx.rs
+++ b/crates/nu_plugin_polars/src/dataframe/command/index/set_with_idx.rs
@@ -99,7 +99,7 @@ fn command(
     let casted = match indices.dtype() {
         DataType::UInt32 | DataType::UInt64 | DataType::Int32 | DataType::Int64 => indices
             .as_ref()
-            .cast(&DataType::UInt32, CastOptions::default())
+            .cast(&DataType::UInt64, CastOptions::default())
             .map_err(|e| ShellError::GenericError {
                 error: "Error casting indices".into(),
                 msg: e.to_string(),
@@ -117,7 +117,7 @@ fn command(
     }?;
 
     let indices = casted
-        .u32()
+        .u64()
         .map_err(|e| ShellError::GenericError {
             error: "Error casting indices".into(),
             msg: e.to_string(),