diff --git a/Dockerfile.interim b/Dockerfile.interim
index f1d654c..ba01559 100644
--- a/Dockerfile.interim
+++ b/Dockerfile.interim
@@ -66,6 +66,7 @@ ENV LANG=en_US.UTF8
 
 ADD https://apt.postgresql.org/pub/repos/apt/ACCC4CF8.asc /etc/apt/keyrings/pgdg.gpg.bin
 COPY /apt/sources.pgdg /etc/apt/sources.list.d/pgdg.sources
+COPY /apt/preferences.pgdg /etc/apt/preferences.d/pgdg
 RUN env -C /etc/apt/keyrings gpg-export.sh pgdg.gpg.bin pgdg.gpg.asc
 
 COPY --from=postgresql-upstream /etc/postgresql-common/createcluster.conf /etc/postgresql-common/
diff --git a/apt/preferences.pgdg b/apt/preferences.pgdg
new file mode 100644
index 0000000..771de59
--- /dev/null
+++ b/apt/preferences.pgdg
@@ -0,0 +1,7 @@
+Package: *
+Pin: release a=bookworm-pgdg
+Pin-Priority: 600
+
+Package: src:postgresql-16
+Pin: release a=bookworm-pgdg
+Pin-Priority: 700