diff --git a/src/mime.cr b/src/mime.cr
index 9a369cde2f6b..251b0a32b858 100644
--- a/src/mime.cr
+++ b/src/mime.cr
@@ -94,6 +94,7 @@ module MIME
     ".svg"  => "image/svg+xml",
     ".txt"  => "text/plain; charset=utf-8",
     ".xml"  => "text/xml; charset=utf-8",
+    ".wasm" => "application/wasm",
   }
 
   # Initializes the MIME database.