diff --git a/include/fast_float/float_common.h b/include/fast_float/float_common.h
index 780f6d7..8ada34d 100644
--- a/include/fast_float/float_common.h
+++ b/include/fast_float/float_common.h
@@ -68,20 +68,20 @@ using from_chars_result = from_chars_result_t<char>;
 
 template <typename UC> struct parse_options_t {
   FASTFLOAT_CONSTEXPR20 explicit parse_options_t(
-      chars_format fmt = chars_format::general, UC dot = UC('.'),
+      chars_format const fmt = chars_format::general, UC const dot = UC('.'),
       int const b = 10) noexcept
       : format(fmt), decimal_point(dot), base(uint8_t(b)) {
 #ifdef FASTFLOAT_ONLY_POSITIVE_C_NUMBER_WO_INF_NAN
-    assert(b >= 2 && b <= 36);
+    //static_assert(b >= 2 && b <= 36);
 #endif
   }
 
   /** Which number formats are accepted */
-  chars_format format;
+  chars_format const format;
   /** The character used as decimal point */
-  UC decimal_point;
+  UC const decimal_point;
   /** The base used for integers */
-  uint8_t base; /* only allowed from 2 to 36 */
+  uint8_t const base; /* only allowed from 2 to 36 */
   FASTFLOAT_ASSUME(base >= 2 && base <= 36);
 };
 
diff --git a/include/fast_float/parse_number.h b/include/fast_float/parse_number.h
index ca94b05..7cece6b 100644
--- a/include/fast_float/parse_number.h
+++ b/include/fast_float/parse_number.h
@@ -312,7 +312,7 @@ from_chars_float_advanced(UC const *first, UC const *last, T &value,
 #ifndef FASTFLOAT_ONLY_POSITIVE_C_NUMBER_WO_INF_NAN
   if (uint8_t(options.format & chars_format::skip_white_space)) {
     while ((first != last) && fast_float::is_space(*first)) {
-      first++;
+      ++first;
     }
   }
   if (first == last) {
@@ -375,7 +375,7 @@ from_chars_int_advanced(UC const *first, UC const *last, T &value,
 #ifndef FASTFLOAT_ONLY_POSITIVE_C_NUMBER_WO_INF_NAN
   if (uint8_t(options.format & chars_format::skip_white_space)) {
     while ((first != last) && fast_float::is_space(*first)) {
-      first++;
+      ++first;
     }
   }
   if (first == last || options.base < 2 || options.base > 36) {