diff --git a/build.sh b/build.sh
index 217ba35..c04c293 100755
--- a/build.sh
+++ b/build.sh
@@ -1,6 +1,7 @@
 #!/usr/bin/env bash
 
 . ~/venv/domainaware/bin/activate
+pip install -U -r requirements.txt
 cd docs && make html && cp -r _build/html/* ../../parsedmarc-docs/
 cd ..
 rm -rf dist/ build/