diff --git a/appveyor.yml b/appveyor.yml
index a86f065a..3105ba4f 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -20,6 +20,7 @@ install:
   - "pip install pypiwin32"
   - "pip install certauth boto3 youtube-dl pysocks"
   - "pip install codecov"
+  - "pip install -U git+https://github.com/webrecorder/warcio@close_stream_opt#egg=warcio-1.5.3"
 
 build_script:
   - "python setup.py install"