diff --git a/src/WebResponses.cpp b/src/WebResponses.cpp
index 2f54e7426..a8b69f617 100644
--- a/src/WebResponses.cpp
+++ b/src/WebResponses.cpp
@@ -662,6 +662,10 @@ void AsyncFileResponse::_setContentTypeFromPath(const String &path) {
     _contentType = T_image_svg_xml;
   } else if (strcmp(dot, T__jpg) == 0) {
     _contentType = T_image_jpeg;
+  } else if (strcmp(dot, T__webp) == 0) {
+    _contentType = T_image_webp;
+  } else if (strcmp(dot, T__avif) == 0) {
+    _contentType = T_image_avif;
   } else if (strcmp(dot, T__gif) == 0) {
     _contentType = T_image_gif;
   } else if (strcmp(dot, T__woff2) == 0) {
diff --git a/src/literals.h b/src/literals.h
index b3ea800d5..0b3c80035 100644
--- a/src/literals.h
+++ b/src/literals.h
@@ -106,6 +106,7 @@ static constexpr const char *T_RCT_EVENT = "RCT_EVENT";
 static constexpr const char *T_ERROR = "ERROR";
 
 // extensions & MIME-Types
+static constexpr const char *T__avif = ".avif";
 static constexpr const char *T__css = ".css";
 static constexpr const char *T__eot = ".eot";
 static constexpr const char *T__gif = ".gif";
@@ -120,6 +121,7 @@ static constexpr const char *T__pdf = ".pdf";
 static constexpr const char *T__png = ".png";
 static constexpr const char *T__svg = ".svg";
 static constexpr const char *T__ttf = ".ttf";
+static constexpr const char *T__webp = ".webp";
 static constexpr const char *T__woff = ".woff";
 static constexpr const char *T__woff2 = ".woff2";
 static constexpr const char *T__xml = ".xml";
@@ -134,10 +136,12 @@ static constexpr const char *T_font_eot = "font/eot";
 static constexpr const char *T_font_ttf = "font/ttf";
 static constexpr const char *T_font_woff = "font/woff";
 static constexpr const char *T_font_woff2 = "font/woff2";
+static constexpr const char *T_image_avif = "image/avif";
 static constexpr const char *T_image_gif = "image/gif";
 static constexpr const char *T_image_jpeg = "image/jpeg";
 static constexpr const char *T_image_png = "image/png";
 static constexpr const char *T_image_svg_xml = "image/svg+xml";
+static constexpr const char *T_image_webp = "image/webp";
 static constexpr const char *T_image_x_icon = "image/x-icon";
 static constexpr const char *T_text_css = "text/css";
 static constexpr const char *T_text_event_stream = "text/event-stream";