diff --git a/pokedex/data/csv/pokemon_habitats.csv b/pokedex/data/csv/pokemon_habitats.csv
index 0c88813..77439b9 100644
--- a/pokedex/data/csv/pokemon_habitats.csv
+++ b/pokedex/data/csv/pokemon_habitats.csv
@@ -8,3 +8,4 @@ id,identifier
 7,sea
 8,urban
 9,waters-edge
+10,unknown