diff --git a/_extensions/diagram/diagram.lua b/_extensions/diagram/diagram.lua
index 20d12da..1f23acf 100644
--- a/_extensions/diagram/diagram.lua
+++ b/_extensions/diagram/diagram.lua
@@ -158,7 +158,7 @@ local mermaid = {
         write_file(infile, code)
         pipe(
           self.execpath or 'mmdc',
-          {"--pdfFit", "--input", infile, "--output", outfile},
+          {"--pdfFit", "--iconPacksNamesAndUrls", "mdi#https://unpkg.com/@iconify-json/mdi@1.2.3/icons.json", "--input", infile, "--output", outfile},
           ''
         )
         return read_file(outfile), mime_type