1 files changed, 1 insertions, 0 deletions

diff --git a/Makefile b/Makefile
index 03c6a0d6..b52ba22f 100644
--- a/Makefile
+++ b/Makefile
@@ -156,6 +156,7 @@ phpdoc: clean
 htmldoc:
         python3 -m venv venv/
         bash -c 'source venv/bin/activate; \
+        pip install wheel; \
         pip install mkdocs; \
         mkdocs build --clean'
         find doc/html/ -type f -exec chmod a-x '{}' \;