Python and psycopg2 - convert python list of jsonb elements to postgres jsonb array

I was hoping someone may be able to help me out. I am trying to insert a python(2.7) list of jsonb elements into a postgresql(9.4) table with a column of datatype: jsonb[].

Here's some code:

import json
anArray = [{"name":"Joe","age":51,"yob":1964,"gender":"male"},{"name":"George","age":41,"dob":1974,"gender":"male"},{"name":"Nick","age":31,"dob":1984,"gender":"male"}]
myArray = []
#here's what I have so far: 
for e in anArray:
    myArray.append(json.dumps(e))
#this gives me
myArray = ['{"name":"Joe","age":51,"yob":1964,"gender":"male"}','{"name":"George","age":41,"dob":1974,"gender":"male"}','{"name":"Nick","age":31,"dob":1984,"gender":"male"}']
#insert commands
insert_sql = "INSERT INTO my_table (data) VALUES (%s);"
insert_data = (myArray, )
cursor.execute(insert_sql, insert_data)

Now when I try to insert myArray, psycopg2 gives me an error

psycopg2.ProgrammingError: column "data" is of type jsonb[] but expression is of type text[]

I'm not quite sure what the correct syntax is to insert this data into the table. Any help/pointers will be appreciated.

Solution Thanks to piro, it was a quick solution.

insert_sql = "INSERT INTO my_table (data) VALUES (%s::json[b]);"
insert_data = (myArray, )
cursor.execute(insert_sql, insert_data)

Cheers.