diff --git a/repos/system_upgrade/el9toel10/actors/preparepamuserdb/actor.py b/repos/system_upgrade/el9toel10/actors/preparepamuserdb/actor.py
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+++ b/repos/system_upgrade/el9toel10/actors/preparepamuserdb/actor.py
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+from leapp.actors import Actor
+from leapp.libraries.actor import preparepamuserdb
+from leapp.models import PamUserDbLocation
+from leapp.tags import IPUWorkflowTag, RPMUpgradePhaseTag
+
+
+class PreparePamUserDb(Actor):
+    """
+    Convert the pam_userdb databases to GDBM
+    """
+
+    name = 'prepare_pam_user_db'
+    consumes = (PamUserDbLocation,)
+    produces = ()
+    tags = (RPMUpgradePhaseTag, IPUWorkflowTag)
+
+    def process(self):
+        preparepamuserdb.process()
diff --git a/repos/system_upgrade/el9toel10/actors/preparepamuserdb/libraries/preparepamuserdb.py b/repos/system_upgrade/el9toel10/actors/preparepamuserdb/libraries/preparepamuserdb.py
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+++ b/repos/system_upgrade/el9toel10/actors/preparepamuserdb/libraries/preparepamuserdb.py
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+import subprocess
+
+from leapp.libraries.stdlib import api
+from leapp.models import PamUserDbLocation
+
+
+def process():
+    for msg in api.consume(PamUserDbLocation):
+        locations = msg.locations
+
+    for location in locations:
+        cmd = f'db_converter --src {location}.db --dest {location}.gdbm'
+        try:
+            subprocess.call(cmd, shell=True)
+        except subprocess.CalledProcessError as e:
+            api.current_logger().error(
+                '{} returned non-zero exit status: {}'.format(cmd, e.returncode)
+            )
+            return
diff --git a/repos/system_upgrade/el9toel10/actors/preparepamuserdb/tests/files/db1.db b/repos/system_upgrade/el9toel10/actors/preparepamuserdb/tests/files/db1.db
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diff --git a/repos/system_upgrade/el9toel10/actors/preparepamuserdb/tests/files/db2.db b/repos/system_upgrade/el9toel10/actors/preparepamuserdb/tests/files/db2.db
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diff --git a/repos/system_upgrade/el9toel10/actors/preparepamuserdb/tests/test_preparepamuserdb.py b/repos/system_upgrade/el9toel10/actors/preparepamuserdb/tests/test_preparepamuserdb.py
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+++ b/repos/system_upgrade/el9toel10/actors/preparepamuserdb/tests/test_preparepamuserdb.py
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+import os
+from pathlib import Path
+
+import pytest
+
+from leapp.libraries.actor import preparepamuserdb
+from leapp.libraries.stdlib import api
+from leapp.models import PamUserDbLocation
+
+CUR_DIR = os.path.dirname(os.path.abspath(__file__))
+
+
+def test_process_locations(current_actor_context):
+    current_actor_context.feed(
+        PamUserDbLocation(
+            locations=[f'{CUR_DIR}/files/db1', f'{CUR_DIR}/files/db2']
+        )
+    )
+    current_actor_context.run()
+    db1 = Path(f'{CUR_DIR}/files/db1.gdbm')
+    assert db1.is_file()
+    db2 = Path(f'{CUR_DIR}/files/db2.gdbm')
+    assert db2.is_file()