diff --git a/buffa/src/json_helpers.rs b/buffa/src/json_helpers.rs
index 2a47380..7420537 100644
--- a/buffa/src/json_helpers.rs
+++ b/buffa/src/json_helpers.rs
@@ -602,7 +602,7 @@ where
 /// Returns `true` if `f` has no fractional part (i.e. it is an exact integer).
 ///
 /// Avoids `f64::trunc()` because it was only moved to `core` in Rust 1.86
-/// and we support MSRV 1.81.  Instead, casts to `i128` and back — if the
+/// and we support MSRV 1.85.  Instead, casts to `i128` and back — if the
 /// round-trip preserves the value, `f` has no fractional part.  Values outside
 /// i128 range saturate, producing a mismatch that correctly returns `false`.
 fn is_exact_integer(f: f64) -> bool {