diff --git a/envs/environment.yaml b/envs/environment.yaml
index 98cf858d..e40d07d8 100644
--- a/envs/environment.yaml
+++ b/envs/environment.yaml
@@ -24,7 +24,7 @@ dependencies:
 - yaml
 - pytables
 - lxml
-- powerplantmatching>=0.5.15
+- powerplantmatching>=0.5.15,<0.6
 - numpy
 - pandas>=2.1
 - geopandas>=1