diff --git a/reverse_proxy/defaults/main.yml b/reverse_proxy/defaults/main.yml
index 725531a..8e47e3b 100644
--- a/reverse_proxy/defaults/main.yml
+++ b/reverse_proxy/defaults/main.yml
@@ -8,7 +8,7 @@ cran_regex: ^/(bin/windows|src)/contrib/(4\.1|4\.3|4\.4|3\.6)*/*[a-zA-Z0-9_\-\.]
 
 # bioconductor
 bioconductor_mirror: https://bioconductor.statistik.tu-dortmund.de/
-bioc_repo_regex: ^\/packages\/[0-9\.]+\/(bioc\/)*(src|bin\/windows)\/contrib\/[a-zA-Z0-9_\-\.]*(\.tar\.gz|\.zip)$
+bioc_repo_regex: ^\/packages\/[0-9\.]+\/(bioc\/)?(src|bin\/windows)\/contrib\/[a-zA-Z0-9_\-\.]*(\.tar\.gz|\.zip)$
 bioc_index_regex: ^\/packages\/[0-9\.]+\/(bioc|workflows)\/src\/contrib\/PACKAGES$
 bioc_data_regex: ^\/packages\/[0-9\.]+\/(workflows|data\/(annotation|experiment))\/src\/contrib\/PACKAGES$
 bioconductor_regex: '({{bioc_repo_regex}}|{{bioc_index_regex}}|{{bioc_data_regex}})'