diff --git a/entrypoint.sh b/entrypoint.sh
index df82332..afc24c6 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -1,3 +1,64 @@
 #!/usr/bin/env bash
 
-set -e
+set -euo pipefail
+
+echo "::group::setup-postgresql"
+
+echo "Verifying version"
+
+# Check if the input is an integer
+if ! [[ "$INPUT_POSTGRESQL_VERSION" =~ ^[0-9]+$ ]]; then
+    echo "Error: $INPUT_POSTGRESQL_VERSION is not a valid integer."
+    exit 1
+fi
+
+# Check if the input is between 10 and 15 (inclusive)
+if (( INPUT_POSTGRESQL_VERSION < 10 || INPUT_POSTGRESQL_VERSION > 15 )); then
+    echo "Error: $INPUT_POSTGRESQL_VERSION is not between 10 and 15 (inclusive)."
+    exit 1
+fi
+
+echo "Validated postgresql version: $INPUT_POSTGRESQL_VERSION"
+
+echo "Installing postgresql..."
+
+if [[ "$(uname -s)" == "Linux" ]]; then
+    # Create the file repository configuration:
+    sudo sh -c 'echo "deb https://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list'
+
+    # Import the repository signing key:
+    wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
+
+    # Update the package lists:
+    sudo apt-get update
+
+    # Install PostgreSQL
+    sudo apt-get install -y "postgresql-$INPUT_POSTGRESQL_VERSION"
+elif [[ "$(uname -s)" == "NT"* ]]; then
+    choco install postgresql --version="$INPUT_POSTGRESQL_VERSION" -y
+elif [[ "$(uname -s)" == "Darwin" ]]; then
+    brew update
+    brew install "postgresql@$INPUT_POSTGRESQL_VERSION"
+else
+    echo "Unsupported OS"
+    exit 1
+fi
+
+echo "Installed postgresql"
+
+echo "Verifying installation..."
+
+# Verify installation by running pg_dump directly
+if [[ "$(uname -s)" == "NT"* ]]; then
+    "/Program Files/PostgreSQL/$INPUT_POSTGRESQL_VERSION/bin/pg_dump" --version
+
+    echo "/Program Files/PostgreSQL/$INPUT_POSTGRESQL_VERSION/bin" >> $GITHUB_PATH
+else
+    "/usr/lib/postgresql/$INPUT_POSTGRESQL_VERSION/bin/pg_dump" --version
+
+    echo "/usr/lib/postgresql/$INPUT_POSTGRESQL_VERSION/bin" >> $GITHUB_PATH
+fi
+
+echo "Complete"
+
+echo "::endgroup::"