diff --git a/sources/iron.h b/sources/iron.h
index abeab86..6d17e99 100644
--- a/sources/iron.h
+++ b/sources/iron.h
@@ -826,8 +826,13 @@ f32 math_acos(f32 x) { return acosf(x); }
 f32 math_exp(f32 x) { return expf(x); }
 f32 math_fmod(f32 x, f32 y) { return fmod(x, y); }
 
+#ifdef _WIN32
+i32 parse_int(const char *s) { return _strtoi64(s, NULL, 10); }
+i32 parse_int_hex(const char *s) { return _strtoi64(s, NULL, 16); }
+#else
 i32 parse_int(const char *s) { return strtol(s, NULL, 10); }
 i32 parse_int_hex(const char *s) { return strtol(s, NULL, 16); }
+#endif
 f32 parse_float(const char *s) { return strtof(s, NULL); }
 
 i32 color_from_floats(f32 r, f32 g, f32 b, f32 a) {
diff --git a/sources/iron_json.c b/sources/iron_json.c
index 5dde98a..5433c28 100644
--- a/sources/iron_json.c
+++ b/sources/iron_json.c
@@ -28,6 +28,9 @@ static void store_u8(uint8_t u8) {
 }
 
 static void store_i32(int32_t i32) {
+	// TODO: signed overflow is UB
+	// if (i32 > INT32_MAX)
+	// 	i32 = (int32_t)(i32 - INT32_MAX - 1) - INT32_MAX - 1;
 	wi += pad(wi, 4);
 	*(int32_t *)(decoded + wi) = i32;
 	wi += 4;
@@ -149,7 +152,11 @@ static void token_write() {
 		else {
 			has_dot(source + t.start, t.end - t.start) ?
 				store_f32(strtof(source + t.start, NULL)) :
+				#ifdef _WIN32
+				store_i32(_strtoi64(source + t.start, NULL, 10));
+				#else
 				store_i32(strtol(source + t.start, NULL, 10));
+				#endif
 		}
 	}
 	else if (t.type == JSMN_ARRAY) {
diff --git a/sources/iron_ui_ext.c b/sources/iron_ui_ext.c
index 697f9fd..b26ebfc 100644
--- a/sources/iron_ui_ext.c
+++ b/sources/iron_ui_ext.c
@@ -425,7 +425,11 @@ int ui_color_wheel(ui_handle_t *handle, bool alpha, float w, float h, bool color
 			hex_code[0] = 'f';
 			hex_code[1] = 'f';
 		}
+		#ifdef _WIN32
+		handle->color = _strtoi64(hex_code, NULL, 16);
+		#else
 		handle->color = strtol(hex_code, NULL, 16);
+		#endif
 	}
 	if (h0->changed || h1->changed || h2->changed) {
 		handle->changed = current->changed = true;
diff --git a/sources/ts/ui.ts b/sources/ts/ui.ts
index 8e51ce1..e331fd2 100644
--- a/sources/ts/ui.ts
+++ b/sources/ts/ui.ts
@@ -354,7 +354,7 @@ declare type ui_options_t = {
 };
 
 declare type ui_coloring_t = {
-	color?: i32;
+	color?: u32;
 	start?: string[];
 	end?: string;
 	separated?: bool;
@@ -362,7 +362,7 @@ declare type ui_coloring_t = {
 
 declare type ui_text_coloring_t = {
 	colorings?: ui_coloring_t[];
-	default_color?: i32;
+	default_color?: u32;
 };
 
 declare type ui_canvas_control_t = {
@@ -384,7 +384,7 @@ declare type ui_node_t = {
 	type?: string;
 	x?: f32;
 	y?: f32;
-	color?: i32;
+	color?: u32;
 	inputs?: ui_node_socket_t[];
 	outputs?: ui_node_socket_t[];
 	buttons?: ui_node_button_t[];
@@ -396,7 +396,7 @@ declare type ui_node_socket_t = {
 	node_id?: i32;
 	name?: string;
 	type?: string;
-	color?: i32;
+	color?: u32;
 	default_value?: f32_array_t;
 	min?: f32;
 	max?: f32;
diff --git a/tools/amake/iron.h b/tools/amake/iron.h
index 1a47c80..6644079 100644
--- a/tools/amake/iron.h
+++ b/tools/amake/iron.h
@@ -62,6 +62,11 @@ f32 math_acos(f32 x) { return acosf(x); }
 f32 math_exp(f32 x) { return expf(x); }
 f32 math_fmod(f32 x, f32 y) { return fmod(x, y); }
 
+#ifdef _WIN32
+i32 parse_int(const char *s) { return _strtoi64(s, NULL, 10); }
+i32 parse_int_hex(const char *s) { return _strtoi64(s, NULL, 16); }
+#else
 i32 parse_int(const char *s) { return strtol(s, NULL, 10); }
 i32 parse_int_hex(const char *s) { return strtol(s, NULL, 16); }
+#endif
 f32 parse_float(const char *s) { return strtof(s, NULL); }