diff --git a/external/singularity-opac b/external/singularity-opac
index 5c6c1e31..8c1bd1a8 160000
--- a/external/singularity-opac
+++ b/external/singularity-opac
@@ -1 +1 @@
-Subproject commit 5c6c1e31740868d2f6859cbd018cbc537a065b7a
+Subproject commit 8c1bd1a8ee714292fd4016e12835549337b6a0c1