diff --git a/Discovery/Web-Content/web-all-content-types.txt b/Discovery/Web-Content/web-all-content-types.txt
index ce2645e4..bd75d0f7 100644
--- a/Discovery/Web-Content/web-all-content-types.txt
+++ b/Discovery/Web-Content/web-all-content-types.txt
@@ -140,6 +140,7 @@ application/geoxacml+xml
 application/gltf-buffer
 application/gml+xml
 application/gzip
+application/grpc
 application/h224
 application/held+xml
 application/http
@@ -2063,4 +2064,4 @@ video/x-ms-wmx
 video/x-ms-wvx
 video/x-msvideo
 video/x-sgi-movie
-x-conference/x-cooltalk
\ No newline at end of file
+x-conference/x-cooltalk