--- a/crates/jrsonnet-evaluator/src/integrations/serde.rs
+++ b/crates/jrsonnet-evaluator/src/integrations/serde.rs
@@ -17,7 +17,7 @@
 			Val::Bool(b) => Value::Bool(*b),
 			Val::Null => Value::Null,
 			Val::Str(s) => Value::String((&s as &str).into()),
-			Val::Num(n) => Value::Number(if *n <= f64::EPSILON {
+			Val::Num(n) => Value::Number(if n.fract() <= f64::EPSILON {
 				(*n as i64).into()
 			} else {
 				Number::from_f64(*n).expect("to json number")