diff --git a/combinations/hash.tsv b/combinations/hash.tsv
index ddef6b0fa..6ca64413d 100644
--- a/combinations/hash.tsv
+++ b/combinations/hash.tsv
@@ -615,3 +615,4 @@ julia=1.10
 r-seqinr=4.2_36,r-digest=0.6.37,r-rlist=0.4.6.2,r-tiledb=0.30.0
 r-seqinr=4.2_36,r-digest=0.6.37,r-rlist=0.4.6.2,r-tiledb=0.30.0,bioconductor-biocgenerics=0.48.1,bioconductor-biostrings=2.70.1,r-optparse=1.7.5,r-rmarkdown=2.28
 r-pafr=0.0.2,r-viridislite=0.4.2,r-data.table=1.15.4,r-yaml=2.3.10,r-ggplot2=3.5.1,r-gtools=3.9.5
+mechanize=0.2.5