diff --git a/postgres/13/Dockerfile b/postgres/13/Dockerfile
index c7fd2f1..875680c 100644
--- a/postgres/13/Dockerfile
+++ b/postgres/13/Dockerfile
@@ -84,7 +84,7 @@ RUN curl -sSL "https://github.com/pgpartman/pg_partman/archive/v${POSTGRESQL_PG_
 RUN install_packages binutils
 RUN find "${POSTGRESQL_BASE_DIR}" -type f -name '*.o' -o -perm /u=x,g=x,o=x -exec strip {} \; || true
 
-FROM debian:11-slim
+FROM debian:13-slim
 
 ARG EXTRA_LOCALES
 ARG TARGETARCH
diff --git a/postgres/18/Dockerfile b/postgres/18/Dockerfile
index c517033..1de7d22 100644
--- a/postgres/18/Dockerfile
+++ b/postgres/18/Dockerfile
@@ -81,7 +81,7 @@ RUN curl -sSL "https://github.com/pgpartman/pg_partman/archive/refs/tags/v${POST
 RUN install_packages binutils
 RUN find "${POSTGRESQL_BASE_DIR}" -type f -name '*.o' -o -perm /u=x,g=x,o=x -exec strip {} \; || true
 
-FROM debian:11-slim
+FROM debian:13-slim
 
 ARG EXTRA_LOCALES
 ARG TARGETARCH