diff --git a/reneo/workflow/envs/koverage.yaml b/reneo/workflow/envs/koverage.yaml
index 9900439..f931c95 100644
--- a/reneo/workflow/envs/koverage.yaml
+++ b/reneo/workflow/envs/koverage.yaml
@@ -6,3 +6,4 @@ dependencies:
     - pip
     - pip:
         - koverage>=0.1.8
+        - numpy==1.26.4