diff --git a/relay/process-compose-scripts/download-zk-and-dat-files.sh b/relay/process-compose-scripts/download-zk-and-dat-files.sh
index 7b86a5609..a97934386 100755
--- a/relay/process-compose-scripts/download-zk-and-dat-files.sh
+++ b/relay/process-compose-scripts/download-zk-and-dat-files.sh
@@ -104,3 +104,29 @@ if [[ "${PRATTER}" != "TRUE" && "${MAINNET}" != "TRUE" ]]; then
   echo "Neither PRATTER nor MAINNET is set or true."
   exit 1
 fi
+
+# Function to update or add a variable in the .env file
+update_env_var() {
+  local var_name=$1
+  local var_value=$2
+  local env_file="${GIT_ROOT}/.env"
+
+  # If the variable exists in the file, update it; otherwise, append it
+  if grep -q "^${var_name}=" "$env_file"; then
+    sed -i "s|^${var_name}=.*|${var_name}=${var_value}|" "$env_file"
+  else
+    echo "${var_name}=${var_value}" >> "$env_file"
+  fi
+}
+
+# Check if PROVER_SERVER_HOST is set in .env and if not set the default value
+if [[ -z "${PROVER_SERVER_HOST}" ]]; then
+  PROVER_SERVER_HOST="http://127.0.0.1"
+  update_env_var "PROVER_SERVER_HOST" "${PROVER_SERVER_HOST}"
+fi
+
+# Check if PROVER_SERVER_PORT is set in .env and if not set the default value
+if [[ -z "${PROVER_SERVER_PORT}" ]]; then
+  PROVER_SERVER_PORT="5000"
+  update_env_var "PROVER_SERVER_PORT" "${PROVER_SERVER_PORT}"
+fi