diff --git a/include/stdex/parser.hpp b/include/stdex/parser.hpp
index 4caffa9d6..3ecef8868 100644
--- a/include/stdex/parser.hpp
+++ b/include/stdex/parser.hpp
@@ -6090,7 +6090,7 @@ namespace stdex
 				for (;;) {
 					if (this->interval.end < end && text[this->interval.end]) {
 						if ('0' <= text[this->interval.end] && text[this->interval.end] <= '9') {
-							size_t _value = static_cast<size_t>(value) * 10 + text[this->interval.end] - '0';
+							size_t _value = static_cast<size_t>(value) * 10 + static_cast<size_t>(text[this->interval.end] - '0');
 							if (_value > UINT16_MAX) {
 								value = 0;
 								this->interval.invalidate();
@@ -6472,7 +6472,7 @@ namespace stdex
 				for (;;) {
 					if (this->interval.end < end && text[this->interval.end]) {
 						if ('0' <= text[this->interval.end] && text[this->interval.end] <= '9') {
-							celi_del = celi_del * 10 + text[this->interval.end] - '0';
+							celi_del = celi_del * 10 + static_cast<size_t>(text[this->interval.end] - '0');
 							this->interval.end++;
 						}
 						else if (text[this->interval.end] == '.') {
@@ -6480,7 +6480,7 @@ namespace stdex
 							for (;;) {
 								if (this->interval.end < end && text[this->interval.end]) {
 									if ('0' <= text[this->interval.end] && text[this->interval.end] <= '9') {
-										decimalni_del = decimalni_del * 10 + text[this->interval.end] - '0';
+										decimalni_del = decimalni_del * 10 + static_cast<size_t>(text[this->interval.end] - '0');
 										decimalni_del_n *= 10;
 										this->interval.end++;
 									}