diff --git a/alembic/versions/3a0765c9a2_hardware_version_hex_to_dec.py b/alembic/versions/3a0765c9a2_hardware_version_hex_to_dec.py
new file mode 100644
index 0000000..54d8588
--- /dev/null
+++ b/alembic/versions/3a0765c9a2_hardware_version_hex_to_dec.py
@@ -0,0 +1,32 @@
+"""hardware version hex to dec
+
+Revision ID: 3a0765c9a2
+Revises: 269ec1bcf99
+Create Date: 2016-02-20 10:31:55.520815
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '3a0765c9a2'
+down_revision = '269ec1bcf99'
+branch_labels = None
+depends_on = None
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+    conn = op.get_bind()
+    res = conn.execute("UPDATE aircraft_beacon "
+                       "SET hardware_version = "
+                       "16 * (hardware_version / 10) + (hardware_version % 10) "
+                       "WHERE hardware_version IS NOT NULL")
+
+
+def downgrade():
+    conn = op.get_bind()
+    res = conn.execute("UPDATE aircraft_beacon "
+                       "SET hardware_version = "
+                       "10 * (hardware_version / 16) + (hardware_version % 16) "
+                       "WHERE hardware_version IS NOT NULL")