diff --git a/setup.cfg b/setup.cfg
index 9e3f10d0202a499366a41c3356c559653c55ae50..c177c7129269b2b0966bf645775b3e672c976286 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -41,4 +41,6 @@ console_scripts =
   caosdb-crawler = caoscrawler.crawl:main
 
 [options.extras_require]
-h5-crawler = h5py >= 3.8
+h5-crawler =
+           h5py >= 3.8
+           numpy