diff --git a/data/custom.xml b/data/custom.xml
index 64264d1..058b351 100644
--- a/data/custom.xml
+++ b/data/custom.xml
@@ -67,7 +67,7 @@
   </mime-type>
 
   <mime-type type="video/webm">
-    <sub-class-of="application/x-matroska" />
+    <sub-class-of type="application/x-matroska" />
 
     <magic priority="50">
       <match value="0x1a45dfa3" type="string" offset="0">
@@ -77,4 +77,26 @@
       </match>
     </magic>
   </mime-type>
+
+  <mime-type type="font/woff">
+    <alias type="application/font-woff"/>
+
+    <magic priority="50">
+      <!-- Source: https://www.w3.org/TR/WOFF/#WOFFHeader -->
+      <match value="0x774F4646" type="string" offset="0" />
+    </magic>
+
+    <glob pattern="*.woff" />
+  </mime-type>
+
+  <mime-type type="font/woff2">
+    <alias type="application/font-woff2" />
+
+    <magic priority="50">
+      <!-- Source https://www.w3.org/TR/WOFF2/#woff20Header -->
+      <match value="0x774F4632" type="string" offset="0" />
+    </magic>
+
+    <glob pattern="*.woff2" />
+  </mime-type>
 </mime-info>
diff --git a/lib/marcel/mime_type/definitions.rb b/lib/marcel/mime_type/definitions.rb
index e3a14ad..bba230c 100644
--- a/lib/marcel/mime_type/definitions.rb
+++ b/lib/marcel/mime_type/definitions.rb
@@ -38,6 +38,7 @@
 Marcel::MimeType.extend "video/mp4", magic: [[4, "ftypisom"], [4, "ftypM4V "]], extensions: %w( mp4 m4v )
 
 Marcel::MimeType.extend "font/ttf", magic: [[0, "\x00\x01\x00\x00"]], extensions: %w( ttf ttc )
+Marcel::MimeType.extend "font/otf", magic: [[0, "OTTO"]], extensions: %w( otf ), parents: "font/ttf"
 Marcel::MimeType.extend "application/vnd.adobe.flash.movie", magic: [[0, "FWS"], [0, "CWS"]], extensions: %w( swf )
 Marcel::MimeType.extend "application/sql", extensions: %w( sql )
 Marcel::MimeType.extend "text/vcard", magic: [[0, "BEGIN:VCARD"]], extensions: %w( vcf ), parents: "text/plain"
diff --git a/lib/marcel/tables.rb b/lib/marcel/tables.rb
index d4659c6..16bf470 100644
--- a/lib/marcel/tables.rb
+++ b/lib/marcel/tables.rb
@@ -1139,6 +1139,8 @@ module Marcel
     'wmv' => 'video/x-ms-wmv',
     'wmx' => 'video/x-ms-wmx',
     'wmz' => 'application/x-ms-wmz',
+    'woff' => 'font/woff',
+    'woff2' => 'font/woff2',
     'wp' => 'application/vnd.wordperfect',
     'wp5' => 'application/vnd.wordperfect',
     'wp6' => 'application/vnd.wordperfect',
@@ -1908,6 +1910,8 @@ module Marcel
     'chemical/x-csml' => [%w(csml), %w(), nil],
     'chemical/x-pdb' => [%w(pdb), %w(), 'Brookhaven Protein Databank File'],
     'chemical/x-xyz' => [%w(xyz), %w(), nil],
+    'font/woff' => [%w(woff), %w(), nil],
+    'font/woff2' => [%w(woff2), %w(), nil],
     'image/aces' => [%w(exr), %w(), 'ACES Image Container File'],
     'image/avif' => [%w(avif), %w(), 'AV1 Image File'],
     'image/bmp' => [%w(bmp dib), %w(), 'Windows bitmap'],
@@ -2399,6 +2403,8 @@ module Marcel
     ['audio/x-ms-wma', [[0..8192, 'Windows Media Audio']]],
     ['audio/x-pn-realaudio', [[0, ".ra\375"]]],
     ['chemical/x-cdx', [[0, 'VjCD0100']]],
+    ['font/woff', [[0, 'wOFF']]],
+    ['font/woff2', [[0, 'wOF2']]],
     ['image/aces', [[0, "v/1\001\002\000\000\000"], [0, "v/1\001\002\004\000\000"]]],
     ['image/cgm', [[0, 'BEGMF']]],
     ['image/emf', [[0, "\001\000\000\000", [[40, ' EMF']]]]],
diff --git a/test/fixtures/magic/font/otf.otf b/test/fixtures/magic/font/otf.otf
new file mode 100644
index 0000000..5baba2d
Binary files /dev/null and b/test/fixtures/magic/font/otf.otf differ
diff --git a/test/fixtures/magic/font/woff.woff b/test/fixtures/magic/font/woff.woff
new file mode 100644
index 0000000..55d893b
Binary files /dev/null and b/test/fixtures/magic/font/woff.woff differ
diff --git a/test/fixtures/magic/font/woff2.woff2 b/test/fixtures/magic/font/woff2.woff2
new file mode 100644
index 0000000..076b416
Binary files /dev/null and b/test/fixtures/magic/font/woff2.woff2 differ
diff --git a/test/fixtures/name/font/otf.otf b/test/fixtures/name/font/otf.otf
new file mode 100644
index 0000000..5baba2d
Binary files /dev/null and b/test/fixtures/name/font/otf.otf differ
diff --git a/test/fixtures/name/font/woff.woff b/test/fixtures/name/font/woff.woff
new file mode 100644
index 0000000..55d893b
Binary files /dev/null and b/test/fixtures/name/font/woff.woff differ
diff --git a/test/fixtures/name/font/woff2.woff2 b/test/fixtures/name/font/woff2.woff2
new file mode 100644
index 0000000..076b416
Binary files /dev/null and b/test/fixtures/name/font/woff2.woff2 differ