diff --git a/src/map.rs b/src/map.rs
index 1d92627..713b4c5 100644
--- a/src/map.rs
+++ b/src/map.rs
@@ -420,6 +420,12 @@ matcher_map!(
         "epub",
         matchers::archive::is_epub
     ),
+    (
+        MatcherType::Archive,
+        "image/openraster",
+        "ora",
+        matchers::archive::is_ora
+    ),
     (
         MatcherType::Archive,
         "application/zip",
diff --git a/src/matchers/archive.rs b/src/matchers/archive.rs
index 710ab99..7fe7668 100644
--- a/src/matchers/archive.rs
+++ b/src/matchers/archive.rs
@@ -3,6 +3,38 @@ pub fn is_epub(buf: &[u8]) -> bool {
     crate::book::is_epub(buf)
 }
 
+pub fn is_ora(buf: &[u8]) -> bool {
+    buf.len() > 57
+        && buf[0] == 0x50
+        && buf[1] == 0x4B
+        && buf[2] == 0x3
+        && buf[3] == 0x4
+        && buf[30] == 0x6D
+        && buf[31] == 0x69
+        && buf[32] == 0x6D
+        && buf[33] == 0x65
+        && buf[34] == 0x74
+        && buf[35] == 0x79
+        && buf[36] == 0x70
+        && buf[37] == 0x65
+        && buf[38] == 0x69
+        && buf[39] == 0x6D
+        && buf[40] == 0x61
+        && buf[41] == 0x67
+        && buf[42] == 0x65
+        && buf[43] == 0x2F
+        && buf[44] == 0x6F
+        && buf[45] == 0x70
+        && buf[46] == 0x65
+        && buf[47] == 0x6E
+        && buf[48] == 0x72
+        && buf[49] == 0x61
+        && buf[50] == 0x73
+        && buf[51] == 0x74
+        && buf[52] == 0x65
+        && buf[53] == 0x72
+}
+
 /// Returns whether a buffer is a zip archive.
 pub fn is_zip(buf: &[u8]) -> bool {
     buf.len() > 3
diff --git a/testdata/sample.ora b/testdata/sample.ora
new file mode 100644
index 0000000..b4d4906
Binary files /dev/null and b/testdata/sample.ora differ
diff --git a/tests/archive.rs b/tests/archive.rs
index f2f1e1d..8feebc4 100644
--- a/tests/archive.rs
+++ b/tests/archive.rs
@@ -9,3 +9,5 @@ test_format!(
 );
 
 test_format!(Archive, "application/zstd", "zst", zst, "sample.tar.zst");
+
+test_format!(Archive, "image/openraster", "ora", ora, "sample.ora");