diff --git a/.gitignore b/.gitignore
index 5cf14e51..0ce14757 100644
--- a/.gitignore
+++ b/.gitignore
@@ -32,4 +32,3 @@ gdrive_credentials
 
 vendor
 client_secrets.json
-b2_secrets.json
diff --git a/cps/kobo.py b/cps/kobo.py
index eb290de6..8e79087e 100644
--- a/cps/kobo.py
+++ b/cps/kobo.py
@@ -8,19 +8,14 @@ import os
 from datetime import datetime, tzinfo, timedelta
 from time import gmtime, strftime
 
-from b2sdk.account_info.in_memory import InMemoryAccountInfo
-from b2sdk.api import B2Api
 from jsonschema import validate, exceptions
 from flask import Blueprint, request, make_response, jsonify, json, send_file
 from flask_login import login_required
 from sqlalchemy import func
 
 from . import config, logger, kobo_auth, ub, db, helper
-from .constants import CONFIG_DIR as _CONFIG_DIR
 from .web import download_required
 
-B2_SECRETS = os.path.join(_CONFIG_DIR, "b2_secrets.json")
-
 kobo = Blueprint("kobo", __name__)
 kobo_auth.disable_failed_auth_redirect_for_blueprint(kobo)
 
@@ -215,39 +210,6 @@ def get_download_url_for_book(book, book_format):
     )
 
 
-def get_download_url_for_book_b2(book, book_format):
-    if not data:
-        log.info(u"Book %s does have a kepub format", book_uuid)
-        return None
-
-    file_name = data.name + ".kepub"
-    file_path = os.path.join(book.path, file_name)
-
-    if not os.path.isfile(B2_SECRETS):
-        log.error(u"b2 secret file not found")
-        return None
-    with open(B2_SECRETS, "r") as filedata:
-        secrets = json.load(filedata)
-
-    info = InMemoryAccountInfo()
-    b2_api = B2Api(info)
-    b2_api.authorize_account(
-        "production", secrets["application_key_id"], secrets["application_key"]
-    )
-    bucket = b2_api.get_bucket_by_name(secrets["bucket_name"])
-    if not bucket:
-        log.error(u"b2 bucket not found")
-        return None
-
-    download_url = b2_api.get_download_url_for_file_name(
-        secrets["bucket_name"], file_path
-    )
-    download_authorization = bucket.get_download_authorization(
-        file_path, valid_duration_in_seconds=600
-    )
-    return download_url + "?Authorization=" + download_authorization
-
-
 def create_book_entitlement(book):
     book_uuid = book.uuid
     return {
diff --git a/optional-requirements.txt b/optional-requirements.txt
index 043a6943..605667d2 100644
--- a/optional-requirements.txt
+++ b/optional-requirements.txt
@@ -32,6 +32,3 @@ rarfile>=2.7
 # other
 natsort>=2.2.0
 git+https://github.com/OzzieIsaacs/comicapi.git@5346716578b2843f54d522f44d01bc8d25001d24#egg=comicapi
-
-# Unsupported/Experimental backblaze integration for Kobo endpoint.
-b2sdk>=1.0.2,<2.0.0