diff --git a/bio/meryl/stats/environment.yaml b/bio/meryl/stats/environment.yaml
index d717ad658d..ae398ce55b 100644
--- a/bio/meryl/stats/environment.yaml
+++ b/bio/meryl/stats/environment.yaml
@@ -3,4 +3,4 @@ channels:
   - conda-forge
   - defaults
 dependencies:
-  - meryl =1.3
+  - meryl =2013