diff --git a/packages/react-components/src/InputNumber.tsx b/packages/react-components/src/InputNumber.tsx
index fc94aff48f..de6ec71015 100644
--- a/packages/react-components/src/InputNumber.tsx
+++ b/packages/react-components/src/InputNumber.tsx
@@ -243,7 +243,10 @@ function InputNumber ({ autoFocus, bitLength = DEFAULT_BITLENGTH, children, clas
     [_onChangeWithSi, value]
   );
 
-  const maxValueLength = getGlobalMaxValue(bitLength).toString().length - 1;
+  // Same as the number of digits, which means it can still overflow, i.e.
+  // for u8 we allow 3, which could be 999 (however 2 digits will limit to only 99,
+  // so this is more-or-less the lesser of evils without a max-value check)
+  const maxValueLength = getGlobalMaxValue(bitLength).toString().length;
 
   return (
     <Input