diff --git a/modules/rhizo_base/templates/buster-pinning.pref.erb b/modules/rhizo_base/templates/buster-pinning.pref.erb
index 730e145..a87e72a 100644
--- a/modules/rhizo_base/templates/buster-pinning.pref.erb
+++ b/modules/rhizo_base/templates/buster-pinning.pref.erb
@@ -15,5 +15,5 @@ Pin: version 3*
 Pin-Priority: 510
 
 Package: libsofia-sip*
-Pin: release a=stable
+Pin: version 1.12.11*
 Pin-Priority: 510
diff --git a/modules/rhizo_base/templates/stretch-pinning.pref.erb b/modules/rhizo_base/templates/stretch-pinning.pref.erb
index 28891cd..7d6be74 100644
--- a/modules/rhizo_base/templates/stretch-pinning.pref.erb
+++ b/modules/rhizo_base/templates/stretch-pinning.pref.erb
@@ -15,5 +15,5 @@ Pin: version 3*
 Pin-Priority: 510
 
 Package: libsofia-sip*
-Pin: release a=oldstable
+Pin: version 1.12.11*
 Pin-Priority: 510