diff --git a/requirements.txt b/requirements.txt
index 3b595b0..bcd30fa 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -87,3 +87,4 @@ wcwidth==0.2.9
 zipp==3.17.0
 memray==1.11.0
 pytest-memray==1.5.0
+pystemmer==2.0.0