diff --git a/Libraries/LibWeb/MimeSniff/Resource.cpp b/Libraries/LibWeb/MimeSniff/Resource.cpp
index 16fa183b4c5..df69b79d376 100644
--- a/Libraries/LibWeb/MimeSniff/Resource.cpp
+++ b/Libraries/LibWeb/MimeSniff/Resource.cpp
@@ -498,8 +498,8 @@ Optional<MimeType> match_an_archive_type_pattern(ReadonlyBytes input)
         // The string "PK" followed by ETX EOT, the ZIP archive signature.
         BytePatternTableRow { "\x50\x4B\x03\x04"sv, "\xFF\xFF\xFF\xFF"sv, no_ignored_bytes, "application/zip"sv },
 
-        // The string "Rar " followed by SUB BEL NUL, the RAR archive signature.
-        BytePatternTableRow { "\x52\x61\x72\x20\x1A\x07\x00"sv, "\xFF\xFF\xFF\xFF\xFF\xFF\xFF"sv, no_ignored_bytes, "application/x-rar-compressed"sv },
+        // The string "Rar!" followed by SUB BEL NUL, the RAR 4.x archive signature.
+        BytePatternTableRow { "\x52\x61\x72\x21\x1A\x07\x00"sv, "\xFF\xFF\xFF\xFF\xFF\xFF\xFF"sv, no_ignored_bytes, "application/x-rar-compressed"sv },
     };
 
     for (auto const& row : pattern_table) {
diff --git a/Tests/LibWeb/TestMimeSniff.cpp b/Tests/LibWeb/TestMimeSniff.cpp
index bafb8cd637a..da5dedda0fc 100644
--- a/Tests/LibWeb/TestMimeSniff.cpp
+++ b/Tests/LibWeb/TestMimeSniff.cpp
@@ -159,7 +159,7 @@ TEST_CASE(determine_computed_mime_type_in_both_none_and_browsing_sniffing_contex
 
     mime_type_to_headers_map.set("application/x-gzip"sv, { "\x1F\x8B\x08"sv });
     mime_type_to_headers_map.set("application/zip"sv, { "PK\x03\x04"sv });
-    mime_type_to_headers_map.set("application/x-rar-compressed"sv, { "Rar\x20\x1A\x07\x00"sv });
+    mime_type_to_headers_map.set("application/x-rar-compressed"sv, { "Rar!\x1A\x07\x00"sv });
 
     for (auto const& mime_type_to_headers : mime_type_to_headers_map) {
         auto mime_type = mime_type_to_headers.key;