diff --git a/modules/rhizo_base/files/buster-pinning.pref b/modules/rhizo_base/files/buster-pinning.pref
new file mode 100644
index 0000000..3ac288e
--- /dev/null
+++ b/modules/rhizo_base/files/buster-pinning.pref
@@ -0,0 +1,19 @@
+Package: freeswitch*
+Pin: version 1.10.3* 
+Pin-Priority: 510
+
+Package: postgresql-*-9.6 
+Pin: version 9.6.18*
+Pin-Priority: 510
+
+Package: postgresql-*-common
+Pin: version 215*
+Pin-Priority: 510
+
+Package: swig
+Pin: version 3*
+Pin-Priority: 510
+
+Package: libsofia-sip*
+Pin: release a=stable
+Pin-Priority: 510