diff --git a/Cargo.lock b/Cargo.lock
index 7a7468f..de623e2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -249,7 +249,7 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "charming"
-version = "0.2.4"
+version = "0.2.5"
 dependencies = [
  "deno_core",
  "handlebars",
diff --git a/charming/src/datatype/source.rs b/charming/src/datatype/source.rs
index 84ac87b..b55f2b0 100644
--- a/charming/src/datatype/source.rs
+++ b/charming/src/datatype/source.rs
@@ -5,17 +5,37 @@ use super::CompositeValue;
 #[derive(Debug, Clone, PartialEq, PartialOrd, Serialize)]
 #[serde(untagged)]
 pub enum DataSource {
-    Integers(Vec<Vec<i32>>),
+    Integers(Vec<Vec<i64>>),
     Floats(Vec<Vec<f64>>),
     Mixed(Vec<Vec<CompositeValue>>),
 }
 
 impl From<Vec<Vec<i32>>> for DataSource {
     fn from(v: Vec<Vec<i32>>) -> Self {
+        let t: Vec<Vec<i64>> = v
+            .iter()
+            .map(|x| x.iter().map(|y| *y as i64).collect())
+            .collect();
+        DataSource::Integers(t)
+    }
+}
+
+impl From<Vec<Vec<i64>>> for DataSource {
+    fn from(v: Vec<Vec<i64>>) -> Self {
         DataSource::Integers(v)
     }
 }
 
+impl From<Vec<Vec<f32>>> for DataSource {
+    fn from(v: Vec<Vec<f32>>) -> Self {
+        let t: Vec<Vec<f64>> = v
+            .iter()
+            .map(|x| x.iter().map(|y| *y as f64).collect())
+            .collect();
+        DataSource::Floats(t)
+    }
+}
+
 impl From<Vec<Vec<f64>>> for DataSource {
     fn from(v: Vec<Vec<f64>>) -> Self {
         DataSource::Floats(v)
@@ -45,6 +65,7 @@ macro_rules! ds {
 
 #[cfg(test)]
 mod test {
+
     use crate::datatype::NumericValue;
 
     use super::*;
@@ -55,6 +76,19 @@ mod test {
         assert_eq!(n, NumericValue::Integer(42));
     }
 
+    #[test]
+    fn numeric_value_from_i64() {
+        let n: NumericValue = 42i64.into();
+        assert_eq!(n, NumericValue::Integer(42));
+    }
+
+    #[test]
+    #[should_panic]
+    fn numeric_value_from_f32() {
+        let n: NumericValue = 0.618f32.into();
+        assert_eq!(n, NumericValue::Float(0.618));
+    }
+
     #[test]
     fn numeric_value_from_f64() {
         let n: NumericValue = 0.618f64.into();
@@ -75,22 +109,51 @@ mod test {
 
     #[test]
     fn data_frame_from_integers() {
-        let ds: DataSource = vec![vec![1, 2, 3], vec![4, 5, 6]].into();
-        assert_eq!(ds, DataSource::Integers(vec![vec![1, 2, 3], vec![4, 5, 6]]));
+        let ds: DataSource = vec![vec![1i32, 2i32, 3i32], vec![4i32, 5i32, 6i32]].into();
+        assert_eq!(
+            ds,
+            DataSource::Integers(vec![vec![1i64, 2i64, 3i64], vec![4i64, 5i64, 6i64]])
+        );
+    }
+
+    #[test]
+    fn data_frame_from_bigintegers() {
+        let ds: DataSource = vec![vec![1i64, 2i64, 3i64], vec![4i64, 5i64, 6i64]].into();
+        assert_eq!(
+            ds,
+            DataSource::Integers(vec![vec![1i64, 2i64, 3i64], vec![4i64, 5i64, 6i64]])
+        );
     }
 
     #[test]
     fn data_frame_from_floats() {
-        let ds: DataSource = vec![vec![1.0, 2.0, 3.0], vec![4.0, 5.0, 6.0]].into();
+        let ds: DataSource =
+            vec![vec![1.0f32, 2.0f32, 3.0f32], vec![4.0f32, 5.0f32, 6.0f32]].into();
         assert_eq!(
             ds,
-            DataSource::Floats(vec![vec![1.0, 2.0, 3.0], vec![4.0, 5.0, 6.0]])
+            DataSource::Floats(vec![
+                vec![1.0f64, 2.0f64, 3.0f64],
+                vec![4.0f64, 5.0f64, 6.0f64]
+            ])
+        );
+    }
+
+    #[test]
+    fn data_frame_from_bigfloats() {
+        let ds: DataSource =
+            vec![vec![1.0f64, 2.0f64, 3.0f64], vec![4.0f64, 5.0f64, 6.0f64]].into();
+        assert_eq!(
+            ds,
+            DataSource::Floats(vec![
+                vec![1.0f64, 2.0f64, 3.0f64],
+                vec![4.0f64, 5.0f64, 6.0f64]
+            ])
         );
     }
 
     #[test]
     fn data_frame_from_mixed() {
-        let ds = ds!([1, "Tuesday", 3.0], ["Monday", 2, "Wednesday"]);
+        let ds = ds!([1i32, "Tuesday", 3.0f32], ["Monday", 2i32, "Wednesday"]);
         assert_eq!(
             ds,
             DataSource::Mixed(vec![
diff --git a/charming/src/datatype/value.rs b/charming/src/datatype/value.rs
index 07c8865..1f0f4dd 100644
--- a/charming/src/datatype/value.rs
+++ b/charming/src/datatype/value.rs
@@ -3,16 +3,28 @@ use serde::{Deserialize, Serialize};
 #[derive(Debug, Clone, PartialEq, PartialOrd, Serialize, Deserialize)]
 #[serde(untagged)]
 pub enum NumericValue {
-    Integer(i32),
+    Integer(i64),
     Float(f64),
 }
 
 impl From<i32> for NumericValue {
     fn from(n: i32) -> Self {
+        NumericValue::Integer(n as i64)
+    }
+}
+
+impl From<i64> for NumericValue {
+    fn from(n: i64) -> Self {
         NumericValue::Integer(n)
     }
 }
 
+impl From<f32> for NumericValue {
+    fn from(n: f32) -> Self {
+        NumericValue::Float(n as f64)
+    }
+}
+
 impl From<f64> for NumericValue {
     fn from(n: f64) -> Self {
         NumericValue::Float(n)