diff --git a/data/custom.xml b/data/custom.xml
index 1c6b3eb..0326199 100644
--- a/data/custom.xml
+++ b/data/custom.xml
@@ -3,7 +3,37 @@
     <sub-class-of type="application/xml" />
 
     <magic priority="60">
-      <match value="&lt;svg" type="string" offset="0:4096" />
+      <!-- Easiest path: SVG files that start directly with <svg tag -->
+      <match value="&lt;svg" type="string" offset="0">
+        <match value="http://www.w3.org/2000/svg" type="string" offset="5:256" />
+      </match>
+    </magic>
+
+    <magic priority="60">
+      <!-- Match SVG files that start with XML declaration, comments, or DOCTYPE -->
+      <match value="&lt;?xml" type="string" offset="0">
+        <match value="&lt;svg" type="string" offset="0:1024">
+          <match value="http://www.w3.org/2000/svg" type="string" offset="5:1280" />
+        </match>
+      </match>
+    </magic>
+
+    <magic priority="60">
+      <!-- Match SVG files that start with comments -->
+      <match value="&lt;!--" type="string" offset="0">
+        <match value="&lt;svg" type="string" offset="0:1024">
+          <match value="http://www.w3.org/2000/svg" type="string" offset="5:1280" />
+        </match>
+      </match>
+    </magic>
+
+    <magic priority="60">
+      <!-- Match SVG files that start with DOCTYPE -->
+      <match value="&lt;!DOCTYPE" type="string" offset="0">
+        <match value="&lt;svg" type="string" offset="0:1024">
+          <match value="http://www.w3.org/2000/svg" type="string" offset="5:1280" />
+        </match>
+      </match>
     </magic>
   </mime-type>
 
diff --git a/lib/marcel/tables.rb b/lib/marcel/tables.rb
index bcc7622..4194040 100644
--- a/lib/marcel/tables.rb
+++ b/lib/marcel/tables.rb
@@ -2519,7 +2519,7 @@ module Marcel
     ['image/vnd.adobe.photoshop', [[0, b["8BPS\000\001"]], [0, b["8BPS\000\002"]]]],
     ['image/webp', [[0, b['RIFF'], [[8, b['WEBP']]]]]],
     ['text/html', [[0, b['(?i)<(html|head|body|title|div)[ >]']], [0, b['(?i)<h[123][ >]']]]],
-    ['image/svg+xml', [[0..4096, b['<svg']]]],
+    ['image/svg+xml', [[0, b['<svg'], [[5..256, b['http://www.w3.org/2000/svg']]]]]],
     ['video/x-msvideo', [[0, b['RIFF'], [[8, b['AVI ']]]], [8, b['AVI ']]]],
     ['video/x-ms-wmv', [[0..8192, b['Windows Media Video']], [0..8192, b['VC-1 Advanced Profile']], [0..8192, b['wmv2']]]],
     ['video/mp4', [[4, b['ftypmp41']], [4, b['ftypmp42']]]],
@@ -2615,6 +2615,9 @@ module Marcel
     ['image/heic-sequence', [[4, b['ftyphevc']], [4, b['ftyphevx']]]],
     ['image/heif', [[4, b['ftypmif1']]]],
     ['image/heif-sequence', [[4, b['ftypmsf1']]]],
+    ['image/svg+xml', [[0, b['<?xml'], [[0..1024, b['<svg'], [[5..1280, b['http://www.w3.org/2000/svg']]]]]]]],
+    ['image/svg+xml', [[0, b['<!--'], [[0..1024, b['<svg'], [[5..1280, b['http://www.w3.org/2000/svg']]]]]]]],
+    ['image/svg+xml', [[0, b['<!DOCTYPE'], [[0..1024, b['<svg'], [[5..1280, b['http://www.w3.org/2000/svg']]]]]]]],
     ['image/x-canon-cr2', [[0, b["MM\000*"], [[8, b['CR']]]], [0, b["II*\000"], [[8, b['CR']]]], [0, b["MM\000+"], [[8, b['CR']]]]]],
     ['image/x-canon-cr3', [[4, b['ftypcrx ']]]],
     ['message/news', [[0, b['Path:']], [0, b['Xref:']]]],
diff --git a/test/fixtures/magic/audio/mpeg/audio1.mp3 b/test/fixtures/magic/audio/mpeg/audio1.mp3
new file mode 100644
index 0000000..1dd9121
Binary files /dev/null and b/test/fixtures/magic/audio/mpeg/audio1.mp3 differ
diff --git a/test/fixtures/name/text/csv/svg.csv b/test/fixtures/name/text/csv/svg.csv
new file mode 100644
index 0000000..6e9d376
--- /dev/null
+++ b/test/fixtures/name/text/csv/svg.csv
@@ -0,0 +1,2 @@
+Name,Age,Occupation
+Marcel Marceau,94,"<svg></svg>"