diff --git a/test/in.tsv b/test/in.tsv
index a12f4bc..ae4b568 100644
--- a/test/in.tsv
+++ b/test/in.tsv
@@ -1,3 +1,4 @@
+passenger_id	p_class	name	sex	age	sib_sp	parch	ticket	fare	cabin	embarked
 486	3	"Lefebre	 Miss. Jeannie"	"female"	NA	3	1	"4133"	25.4667	""	"S"
 109	3	"Rekic	 Mr. Tido"	"male"	38	0	0	"349249"	7.8958	""	"S"
 590	3	"Murdlin	 Mr. Joseph"	"male"	NA	0	0	"A./5. 3235"	8.05	""	"S"
diff --git a/train/in.tsv b/train/in.tsv
index b7cdc1b..cfb715a 100644
--- a/train/in.tsv
+++ b/train/in.tsv
@@ -1,3 +1,4 @@
+passenger_id	p_class	name	sex	age	sib_sp	parch	ticket	fare	cabin	embarked
 530	2	"Hocking	 Mr. Richard George"	"male"	23	2	1	"29104"	11.5	""	"S"
 466	3	"Goncalves	 Mr. Manuel Estanslas"	"male"	38	0	0	"SOTON/O.Q. 3101306"	7.05	""	"S"
 753	3	"Vande Velde	 Mr. Johannes Joseph"	"male"	33	0	0	"345780"	9.5	""	"S"