diff --git a/docker-compose.yaml b/docker-compose.yaml
index ba71436..9d40c46 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -2,7 +2,7 @@ version: '3'
 
 services:
   source_postgres:
-    image: postgres:latest
+    image: postgres:16.2
     ports:
       - "5433:5432"
     networks:
@@ -15,7 +15,7 @@ services:
       - ./source_db_init/init.sql:/docker-entrypoint-initdb.d/init.sql
 
   destination_postgres:
-    image: postgres:latest
+    image: postgres:16.2
     ports:
       - "5434:5432"
     networks:
diff --git a/elt_script/Dockerfile b/elt_script/Dockerfile
index c1ede26..252acd6 100644
--- a/elt_script/Dockerfile
+++ b/elt_script/Dockerfile
@@ -1,10 +1,17 @@
 FROM python:3.8-slim
 
-# Install PostgreSQL command-line tools
-RUN apt-get update && apt-get install -y postgresql-client
+# Install the dependencies for the PostgreSQL repository
+RUN apt-get update && apt-get install -y wget gnupg
+
+# Add the PostgreSQL repository to get the latest PostgreSQL client
+RUN echo "deb http://apt.postgresql.org/pub/repos/apt/ $(. /etc/os-release; echo $VERSION_CODENAME)-pgdg main" > /etc/apt/sources.list.d/pgdg.list \
+    && wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add -
+
+# Install PostgreSQL client version 16
+RUN apt-get update && apt-get install -y postgresql-client-16
 
 # Copy the ELT script 
 COPY elt_script.py .
 
 # Set the default command to run the ELT script
-CMD ["python", "elt_script.py"]
\ No newline at end of file
+CMD ["python", "elt_script.py"]