diff --git a/bio/dada2/collapse-nomismatch/environment.yaml b/bio/dada2/collapse-nomismatch/environment.yaml
index 37b9d0162a1..10d9c3de71c 100644
--- a/bio/dada2/collapse-nomismatch/environment.yaml
+++ b/bio/dada2/collapse-nomismatch/environment.yaml
@@ -3,5 +3,4 @@ channels:
   - bioconda
   - nodefaults
 dependencies:
-  - bioconductor-dada2 =1.22
-
+  - bioconductor-dada2 =1.22.0