diff --git a/README.md b/README.md
index 5f70d39f0a2090c2825df48fbac347889d35282e..962e05cb49ec64654fa0968e7ca8fc374d063eae 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,6 @@ Installation
 ------------
 
 ```bash
-export PIP_EXTRA_INDEX_URL=https://www.walberla.net/pip
 pip install lbmpy[interactive]
 ```