diff --git a/core/expression/Cargo.toml b/core/expression/Cargo.toml
index c1430d28..94c146c4 100644
--- a/core/expression/Cargo.toml
+++ b/core/expression/Cargo.toml
@@ -17,7 +17,7 @@ once_cell = { workspace = true }
 regex = { workspace = true, optional = true }
 regex-lite = { workspace = true, optional = true }
 serde = { workspace = true }
-serde_json = { workspace = true, features = ["arbitrary_precision"] }
+serde_json = { workspace = true, features = [] }
 strum = { workspace = true }
 strum_macros = { workspace = true }
 thiserror = { workspace = true }
@@ -36,6 +36,7 @@ serde_json5 = "0.1.0"
 default = ["regex-deprecated"]
 regex-deprecated = ["dep:regex"]
 regex-lite = ["dep:regex-lite"]
+arbitrary_precision = ["serde_json/arbitrary_precision"]
 
 [[bench]]
 harness = false
diff --git a/core/expression/src/variable/conv.rs b/core/expression/src/variable/conv.rs
index b6bf4184..68ae70bb 100644
--- a/core/expression/src/variable/conv.rs
+++ b/core/expression/src/variable/conv.rs
@@ -1,5 +1,6 @@
 use bumpalo::collections::Vec as BumpVec;
 use bumpalo::Bump;
+use rust_decimal::prelude::FromPrimitive;
 use rust_decimal::Decimal;
 use serde_json::Value;
 
@@ -19,9 +20,30 @@ impl<'arena> ToVariable<'arena> for Value {
         match self {
             Value::Null => Ok(Variable::Null),
             Value::Bool(v) => Ok(Variable::Bool(*v)),
-            Value::Number(n) => Ok(Variable::Number(
-                Decimal::from_str_exact(n.as_str()).map_err(|_| ())?,
-            )),
+            Value::Number(n) => {
+                #[cfg(feature = "arbitrary_precision")]
+                {
+                    Decimal::from_str_exact(n.as_str())
+                        .map_err(|_| ())
+                        .map(Variable::Number)
+                }
+
+                #[cfg(not(feature = "arbitrary_precision"))]
+                {
+                    let decimal = match n.as_u64() {
+                        Some(n) => Decimal::from_u64(n).ok_or(())?,
+                        None => match n.as_i64() {
+                            Some(n) => Decimal::from(n),
+                            None => match n.as_f64() {
+                                Some(n) => Decimal::from_f64(n).ok_or(())?,
+                                None => return Err(()),
+                            },
+                        },
+                    };
+
+                    Ok(Variable::Number(decimal))
+                }
+            }
             Value::String(s) => Ok(Variable::String(arena.alloc_str(s.as_str()))),
             Value::Array(arr) => {
                 let mut vec = BumpVec::with_capacity_in(arr.len(), arena);
diff --git a/core/expression/src/variable/mod.rs b/core/expression/src/variable/mod.rs
index 6757f874..f5bf79e4 100644
--- a/core/expression/src/variable/mod.rs
+++ b/core/expression/src/variable/mod.rs
@@ -80,7 +80,31 @@ impl<'arena> Variable<'arena> {
             Variable::Null => Value::Null,
             Variable::Bool(b) => Value::Bool(*b),
             Variable::Number(n) => {
-                Value::Number(Number::from_string_unchecked(n.normalize().to_string()))
+                #[cfg(feature = "arbitrary_precision")]
+                {
+                    Value::Number(Number::from_string_unchecked(n.normalize().to_string()))
+                }
+
+                #[cfg(not(feature = "arbitrary_precision"))]
+                {
+                    if let Some(n_uint) = n.to_u64() {
+                        if Decimal::from(n_uint) == *n {
+                            return Value::Number(Number::from(n_uint));
+                        }
+                    }
+
+                    if let Some(n_int) = n.to_i64() {
+                        if Decimal::from(n_int) == *n {
+                            return Value::Number(Number::from(n_int));
+                        }
+                    }
+
+                    if let Some(n_float) = n.to_f64() {
+                        return Value::Number(Number::from_f64(n_float).unwrap());
+                    }
+
+                    Value::Null
+                }
             }
             Variable::String(str) => Value::String(str.to_string()),
             Variable::Array(arr) => Value::Array(arr.iter().map(|i| i.to_value()).collect()),
diff --git a/core/expression/tests/isolate.rs b/core/expression/tests/isolate.rs
index 093b742d..452440b8 100644
--- a/core/expression/tests/isolate.rs
+++ b/core/expression/tests/isolate.rs
@@ -61,6 +61,42 @@ fn isolate_standard_test() {
                 },
             ]),
         },
+        TestEnv {
+            env: json!({
+                "a": 3.14f64,
+                "b": 2,
+                "c": 3.141592653589793f64,
+                "d": 18446744073709551615u64,
+                "e": 9_223_372_036_854_775_807i64,
+
+            }),
+            cases: Vec::from([
+                TestCase {
+                    expr: "a",
+                    result: json!(3.14),
+                },
+                TestCase {
+                    expr: "b",
+                    result: json!(2),
+                },
+                TestCase {
+                    expr: "e",
+                    result: json!(9_223_372_036_854_775_807i64),
+                },
+                TestCase {
+                    expr: "a + b",
+                    result: json!(5.14),
+                },
+                TestCase {
+                    expr: "(b + c) - (c + b)",
+                    result: json!(0),
+                },
+                TestCase {
+                    expr: "d",
+                    result: json!(18446744073709551615u64),
+                },
+            ]),
+        },
         TestEnv {
             env: json!({
                 "a": 3,
diff --git a/core/expression/tests/standard.rs b/core/expression/tests/standard.rs
index 350c962e..d8908658 100644
--- a/core/expression/tests/standard.rs
+++ b/core/expression/tests/standard.rs
@@ -281,6 +281,14 @@ fn standard_test() {
                 right: &Node::Array(&[]),
             },
         },
+        StandardTest {
+            src: "25 + 2.5",
+            result: &Node::Binary {
+                left: &Node::Number(D25),
+                right: &Node::Number(D2P5),
+                operator: Operator::Arithmetic(ArithmeticOperator::Add),
+            },
+        },
     ]);
 
     let mut lexer = Lexer::new();