diff --git a/vendor/csscolorparser/csscolorparser.cpp b/vendor/csscolorparser/csscolorparser.cpp
index b0ff5f84e01..74764a22e24 100644
--- a/vendor/csscolorparser/csscolorparser.cpp
+++ b/vendor/csscolorparser/csscolorparser.cpp
@@ -176,7 +176,7 @@ std::vector<std::string> split(const std::string& s, char delim) {
     return elems;
 }
 
-std::experimental::optional<Color> parse(const std::string& css_str) {
+std::optional<Color> parse(const std::string& css_str) {
     std::string str = css_str;
 
     // Remove all whitespace, not compliant, but should just be more accepting.
diff --git a/vendor/csscolorparser/csscolorparser/csscolorparser.hpp b/vendor/csscolorparser/csscolorparser/csscolorparser.hpp
index 30b308022a5..7b41bfa5de2 100644
--- a/vendor/csscolorparser/csscolorparser/csscolorparser.hpp
+++ b/vendor/csscolorparser/csscolorparser/csscolorparser.hpp
@@ -25,8 +25,7 @@
 #ifndef CSS_COLOR_PARSER_CPP
 #define CSS_COLOR_PARSER_CPP
 
-#include <optional.hpp>
-
+#include <optional>
 #include <string>
 #include <cmath>
 
@@ -50,7 +49,7 @@ inline bool operator!=(const Color& lhs, const Color& rhs) {
     return !(lhs == rhs);
 }
 
-std::experimental::optional<Color> parse(const std::string& css_str);
+std::optional<Color> parse(const std::string& css_str);
 
 } // namespace CSSColorParser