diff --git a/envs/UNZIP_and_QC.yaml b/envs/UNZIP_and_QC.yaml
index 9e0ff4244637ae4a91b775d2afe430bbedff98ba..1821361b3f35e3f25f85de844c758873b1e73bf5 100644
--- a/envs/UNZIP_and_QC.yaml
+++ b/envs/UNZIP_and_QC.yaml
@@ -6,7 +6,7 @@ dependencies:
  - multiqc=1.13=pyhdfd78af_0
  - openssl=3.3.1=h4ab18f5_1
  - pandoc=2.11.4=h7f98852_0
- - pigz
+ - pigz=2.8
  - python=3.10.5=ha86cf86_0_cpython
  - trim-galore=0.6.7=hdfd78af_0
  - trimmomatic=0.39=hdfd78af_2