diff --git a/debian/control b/debian/control
--- a/debian/control
+++ b/debian/control
@@ -10,7 +10,7 @@
                python3-hypothesis (>= 3.11.0~),
                python3-pytest,
                python3-pygments,
-               python3-magic,
+               python3-magic (>= 2:0.4.13),
 	       python3-pyld,
                python3-setuptools,
                python3-swh.core (>= 0.0.44~),
diff --git a/requirements.txt b/requirements.txt
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,6 +2,6 @@
 pygments
 click
 chardet
-file_magic
+python-magic >= 0.4.13
 pyld
 xmltodict
diff --git a/swh/indexer/mimetype.py b/swh/indexer/mimetype.py
--- a/swh/indexer/mimetype.py
+++ b/swh/indexer/mimetype.py
@@ -5,10 +5,13 @@
 
 import magic
 
-from swh.model import hashutil
-
 from .indexer import ContentIndexer, ContentRangeIndexer
 
+if not hasattr(magic.Magic, 'from_buffer'):
+    raise ImportError(
+        'Expected "import magic" to import python-magic, but file_magic '
+        'was imported instead.')
+
 
 def compute_mimetype_encoding(raw_content):
     """Determine mimetype and encoding from the raw content.
@@ -21,10 +24,12 @@
         (as bytes).
 
     """
-    r = magic.detect_from_content(raw_content)
+    m = magic.Magic(mime=True, mime_encoding=True)
+    res = m.from_buffer(raw_content)
+    (mimetype, encoding) = res.split('; charset=')
     return {
-        'mimetype': r.mime_type,
-        'encoding': r.encoding,
+        'mimetype': mimetype,
+        'encoding': encoding,
     }
 
 
@@ -67,17 +72,11 @@
             - **encoding** (bytes): encoding in bytes
 
         """
-        try:
-            properties = compute_mimetype_encoding(data)
-            properties.update({
-                'id': id,
-                'indexer_configuration_id': self.tool['id'],
-                })
-        except TypeError:
-            self.log.error('Detecting mimetype error for id %s' % (
-                hashutil.hash_to_hex(id), ))
-            return None
-
+        properties = compute_mimetype_encoding(data)
+        properties.update({
+            'id': id,
+            'indexer_configuration_id': self.tool['id'],
+            })
         return properties
 
     def persist_index_computations(self, results, policy_update):
diff --git a/swh/indexer/origin_head.py b/swh/indexer/origin_head.py
--- a/swh/indexer/origin_head.py
+++ b/swh/indexer/origin_head.py
@@ -29,8 +29,8 @@
             'configuration': {},
         }),
         'tasks': ('dict', {
-            'revision_metadata': 'revision_metadata',
-            'origin_intrinsic_metadata': 'origin_metadata',
+            'revision_metadata': 'indexer_revision_metadata',
+            'origin_intrinsic_metadata': 'indexer_origin_metadata',
         })
     }