diff --git a/.github/workflows/ci_cd.yml b/.github/workflows/ci_cd.yml
index cdc0922..fb1117f 100644
--- a/.github/workflows/ci_cd.yml
+++ b/.github/workflows/ci_cd.yml
@@ -33,8 +33,8 @@ jobs:
           X_DOCKER_TAG: ${{ env.DOCKER_TAG }}
           X_JAVA_OPTIONS: -Xms128m -Xmx2048m
           X_JDBC_URL: ${{ secrets.TEST_JDBC_URL }}
-          # X_OPERATION_MODE: "follow"
-          X_OPERATION_MODE: "month 2024 11"
+          X_OPERATION_MODE: "follow"
+          # X_OPERATION_MODE: "month 2024 11"
 
       - name: Build project
         uses: noi-techpark/github-actions/maven-build@v2
diff --git a/docker-compose.yml b/docker-compose.yml
index c206fb9..d3c7076 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -2,8 +2,6 @@
 #
 # SPDX-License-Identifier: CC0-1.0
 
-version: "3.4"
-
 services:
   app:
     image: maven:3-jdk-8-alpine
diff --git a/src/main/java/it/bz/noi/a22traffic/BulkLoader.java b/src/main/java/it/bz/noi/a22traffic/BulkLoader.java
index d3d7faf..0f2d69c 100644
--- a/src/main/java/it/bz/noi/a22traffic/BulkLoader.java
+++ b/src/main/java/it/bz/noi/a22traffic/BulkLoader.java
@@ -19,6 +19,7 @@
 import java.sql.DriverManager;
 import java.sql.PreparedStatement;
 import java.sql.SQLException;
+import java.sql.Types;
 import java.time.ZonedDateTime;
 import java.util.ArrayList;
 import java.util.HashMap;
@@ -95,8 +96,12 @@ public void run() {
                     ins.setInt(8, Integer.parseInt(res.get(i).get("class")));
                     ins.setDouble(9, Double.parseDouble(res.get(i).get("speed")));
                     ins.setInt(10, Integer.parseInt(res.get(i).get("direction")));
-                    String country = res.get(i).get("country");
-                    ins.setInt(11, !country.equals("null") ? Integer.parseInt(country) : null);
+                    try {
+                        String country = res.get(i).get("country");
+                        ins.setInt(11, Integer.parseInt(country));
+                    } catch (NullPointerException | NumberFormatException e) {
+                        ins.setObject(11, null, Types.INTEGER);
+                    }
                     ins.setString(12, res.get(i).get("license_plate_initials"));
                     ins.execute();
                 }
diff --git a/src/main/java/it/bz/noi/a22traffic/Follower.java b/src/main/java/it/bz/noi/a22traffic/Follower.java
index fbfb952..b82a55e 100644
--- a/src/main/java/it/bz/noi/a22traffic/Follower.java
+++ b/src/main/java/it/bz/noi/a22traffic/Follower.java
@@ -20,6 +20,7 @@
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLException;
+import java.sql.Types;
 import java.time.Instant;
 import java.util.ArrayList;
 import java.util.HashMap;
@@ -200,8 +201,12 @@ public static void fetchNew(Connector conn, String jdbc_url) throws IOException,
             pst.setInt(8, Integer.parseInt(res.get(i).get("class")));
             pst.setDouble(9, Double.parseDouble(res.get(i).get("speed")));
             pst.setInt(10, Integer.parseInt(res.get(i).get("direction")));
-            String country = res.get(i).get("country");
-            pst.setInt(11, !country.equals("null") ? Integer.parseInt(country) : null);
+            try {
+                String country = res.get(i).get("country");
+                pst.setInt(11, Integer.parseInt(country));
+            } catch (NullPointerException | NumberFormatException e) {
+                pst.setObject(11, null, Types.INTEGER);
+            }
             pst.setString(12, res.get(i).get("license_plate_initials"));
             pst.execute();
         }