diff --git a/fastapi_book_server/app/alembic/versions/08193b547a80_.py b/fastapi_book_server/app/alembic/versions/08193b547a80_.py
index 175a026..ff47c3b 100644
--- a/fastapi_book_server/app/alembic/versions/08193b547a80_.py
+++ b/fastapi_book_server/app/alembic/versions/08193b547a80_.py
@@ -19,6 +19,13 @@ depends_on = None
 def upgrade():
     # ### commands auto generated by Alembic - please adjust! ###
     op.create_index(op.f("ix_books_title"), "books", ["title"], unique=False)
+    op.create_index(
+        op.f("ix_books_is_deleted"),
+        "books",
+        [sa.text("is_deleted = 'f'")],
+        unique=False,
+    )
+    op.create_index(op.f("ix_books_file_type"), "books", ["file_type"], unique=False)
     op.create_index(op.f("ix_sequences_name"), "sequences", ["name"], unique=False)
     op.create_index(
         op.f("tgrm_books_title"),
@@ -69,6 +76,20 @@ def upgrade():
         unique=False,
         postgresql_using="btree",
     )
+    op.create_index(
+        op.f("book_sequences_book"),
+        "book_sequences",
+        ["book"],
+        unique=False,
+        postgresql_using="btree",
+    )
+    op.create_index(
+        op.f("book_sequences_sequence"),
+        "book_sequences",
+        ["sequence"],
+        unique=False,
+        postgresql_using="btree",
+    )
     # ### end Alembic commands ###
 
 
@@ -76,6 +97,8 @@ def downgrade():
     # ### commands auto generated by Alembic - please adjust! ###
     op.drop_index(op.f("ix_sequences_name"), table_name="sequences")
     op.drop_index(op.f("ix_books_title"), table_name="books")
+    op.drop_index(op.f("ix_books_is_deleted"), table_name="books")
+    op.drop_index(op.f("ix_books_file_type"), table_name="books")
     op.drop_index(op.f("tgrm_books_title"), table_name="books")
     op.drop_index(op.f("tgrm_sequences_name"), table_name="books")
     op.drop_index(op.f("tgrm_authors_lfm"), table_name="books")
@@ -83,4 +106,6 @@ def downgrade():
     op.drop_index(op.f("tgrm_authors_l"), table_name="books")
     op.drop_index(op.f("book_authors_book"), table_name="book_authors")
     op.drop_index(op.f("book_authors_author"), table_name="book_authors")
+    op.drop_index(op.f("book_sequences_book"), table_name="book_sequences")
+    op.drop_index(op.f("book_sequences_sequence"), table_name="book_sequences")
     # ### end Alembic commands ###
diff --git a/fastapi_book_server/app/models.py b/fastapi_book_server/app/models.py
index 6658bc7..957e820 100644
--- a/fastapi_book_server/app/models.py
+++ b/fastapi_book_server/app/models.py
@@ -143,8 +143,10 @@ class Book(ormar.Model):
     title: str = ormar.String(
         max_length=256, nullable=False, index=True
     )  # type: ignore
-    lang: str = ormar.String(max_length=3, nullable=False)  # type: ignore
-    file_type: str = ormar.String(max_length=4, nullable=False)  # type: ignore
+    lang: str = ormar.String(max_length=3, nullable=False, index=True)  # type: ignore
+    file_type: str = ormar.String(
+        max_length=4, nullable=False, index=True
+    )  # type: ignore
     uploaded: date = ormar.Date()  # type: ignore
     is_deleted: bool = ormar.Boolean(
         default=False, server_default=text("false"), nullable=False