diff --git a/Dockerfile b/Dockerfile
index 00932b0..e0738dd 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-ARG POSTGRES_VERSION=18.3
+ARG POSTGRES_VERSION=18.4
 FROM postgres:${POSTGRES_VERSION}
 
 # ensure setpriv works as expected
@@ -21,7 +21,7 @@ RUN mkdir -p /etc/postgresql/conf.d \
 
 USER postgres
 
-COPY entrypoint.sh /usr/local/bin/pg-entrypoint.sh
+COPY --chmod=755 entrypoint.sh /usr/local/bin/pg-entrypoint.sh
 COPY conf/postgresql.conf /etc/postgresql/postgresql.conf
 COPY conf/pg_hba.conf /etc/postgresql/pg_hba.conf
 COPY pgbackrest.conf.template /usr/local/share/pgbackrest/pgbackrest.conf.template
diff --git a/POSTGRES_VERSION b/POSTGRES_VERSION
index 32adf19..890e452 100644
--- a/POSTGRES_VERSION
+++ b/POSTGRES_VERSION
@@ -1 +1 @@
-18.3
+18.4
diff --git a/VERSION b/VERSION
index becca14..890e452 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-18.3-r1
+18.4
diff --git a/entrypoint.sh b/entrypoint.sh
old mode 100644
new mode 100755