diff --git a/.travis.yml b/.travis.yml
index 61427f2..ee49bde 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,9 +2,11 @@ language: python
 python:
   - "3.5"
   - "3.6"
-  - "3.7"
+  - "3.7.11"
   - "3.8"
 install:
+  - pip install --upgrade pip
+  - pip install --upgrade setuptools
   - pip install -r requirements.txt
 script:
   - coverage run -m unittest discover
diff --git a/requirements.txt b/requirements.txt
index 0b8ea35..d8ea987 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,6 +2,6 @@ requests==2.24.0
 
 # testing
 mock==3.0.5
-httpretty==0.9.7
-coverage==5.2.1
+httpretty==1.1.4
 coveralls==1.11.1
+coverage==5.2.1
diff --git a/youtube_transcript_api/_api.py b/youtube_transcript_api/_api.py
index 37bd6b2..a618b0e 100644
--- a/youtube_transcript_api/_api.py
+++ b/youtube_transcript_api/_api.py
@@ -13,6 +13,7 @@ from ._errors import (
     CookiesInvalid
 )
 
+
 class YouTubeTranscriptApi(object):
     @classmethod
     def list_transcripts(cls, video_id, proxies=None, cookies=None):
diff --git a/youtube_transcript_api/_transcripts.py b/youtube_transcript_api/_transcripts.py
index a031a21..cea50c4 100644
--- a/youtube_transcript_api/_transcripts.py
+++ b/youtube_transcript_api/_transcripts.py
@@ -166,7 +166,7 @@ class TranscriptList(object):
         """
         Finds a transcript for a given language code. Manually created transcripts are returned first and only if none
         are found, generated transcripts are used. If you only want generated transcripts use
-        find_manually_created_transcript instead.
+        `find_manually_created_transcript` instead.
 
         :param language_codes: A list of language codes in a descending priority. For example, if this is set to
         ['de', 'en'] it will first try to fetch the german transcript (de) and then fetch the english transcript (en) if