diff --git a/src/helpers.cpp b/src/helpers.cpp
index 6638327..91cc220 100644
--- a/src/helpers.cpp
+++ b/src/helpers.cpp
@@ -43,7 +43,7 @@ std::string unescape_html(const std::string_view html)
 
     // Source: https://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_
     //         entity_references#Character_entity_references_in_HTML
-    const std::map<std::string_view, char32_t>
+    static const std::map<std::string_view, char32_t>
         names{{"exclamation", 0x0021}, {"quot", 0x0022},    {"percent", 0x0025},
               {"amp", 0x0026},         {"apos", 0x0027},    {"add", 0x002B},
               {"lt", 0x003C},          {"equal", 0x003D},   {"gt", 0x003E},
@@ -150,7 +150,7 @@ std::string unescape_html(const std::string_view html)
         try
         {
             const char32_t codepoint{
-                [&match, &names]
+                [&match]
                 {
                     // If it doesn't start with a '#' it is a named entity.
                     if (match[1].str()[0] != '#')