diff --git a/pymaid/stack.py b/pymaid/stack.py
index 9101170..e86af84 100644
--- a/pymaid/stack.py
+++ b/pymaid/stack.py
@@ -35,7 +35,7 @@
 except ImportError as e:
     raise ImportError(
         'Optional dependencies for stack viewing are not available. '
-        'Make sure the appropriate extra is installed: `pip install navis[stacks]`. '
+        'Make sure the appropriate extra is installed: `pip install pymaid[stack]`. '
         f'Original error: "{str(e)}"'
     )
 
diff --git a/requirements.txt b/requirements.txt
index 21021c9..c60ceb6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,7 +14,7 @@ psutil>=5.4.3
 fuzzywuzzy[speedup]~=0.17.0
 ujson~=1.35
 
-#extra: stacks
+#extra: stack
 zarr
 fsspec[http]
 xarray[parallel]