diff --git a/src/fr/devinsy/statoolinfosweb/CrawlCacheChecker.java b/src/fr/devinsy/statoolinfosweb/CrawlCacheChecker.java
new file mode 100644
index 0000000..6c5d756
--- /dev/null
+++ b/src/fr/devinsy/statoolinfosweb/CrawlCacheChecker.java
@@ -0,0 +1,112 @@
+/*
+ * Copyright (C) 2021-2024 Christian Pierre MOMON christian.momon@devinsy.fr>>
+ * 
+ * This file is part of StatoolInfosWeb, webapp to value service statistics.
+ * 
+ * StatoolInfosWeb is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ * 
+ * StatoolInfosWeb is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Affero General Public License
+ * along with StatoolInfosWeb. If not, see <http://www.gnu.org/licenses/>.
+ */
+package fr.devinsy.statoolinfosweb;
+
+import jakarta.servlet.ServletContextEvent;
+import jakarta.servlet.ServletContextListener;
+import jakarta.servlet.annotation.WebListener;
+
+/**
+ * The Class Checker.
+ */
+@WebListener
+public class CrawlCacheChecker implements ServletContextListener
+{
+    private static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(CrawlCacheChecker.class);
+
+    private static final int CHECK_DELAY = 60 * 1000;
+
+    private Thread checker;
+
+    @Override
+    public void contextInitialized(ServletContextEvent event)
+    {
+        logger.info("Starting checker thread…");
+        this.checker = new Thread()
+        {
+            @Override
+            public void run()
+            {
+                // while (!Thread.currentThread().isInterrupted())
+                // {
+                // try
+                // {
+                // Thread.sleep(CHECK_DELAY);
+                // StatoolInfosWeb.instance().check();
+                // }
+                // catch (InterruptedException exception)
+                // {
+                // Thread.currentThread().interrupt();
+                // logger.error("Check sleep interrupted so ending checker: {}",
+                // exception.getMessage());
+                // }
+                // }
+                //
+                // boolean ended = false;
+                // while (!ended)
+                // {
+                // try
+                // {
+                // Thread.sleep(CHECK_DELAY);
+                // StatoolInfosWeb.instance().check();
+                // if (Thread.currentThread().isInterrupted())
+                // {
+                // logger.error("Interrupted status detected so ending
+                // checker.");
+                // ended = true;
+                // }
+                // }
+                // catch (InterruptedException exception)
+                // {
+                // logger.error("Check sleep interrupted so ending checker: {}",
+                // exception.getMessage());
+                // ended = true;
+                // }
+                // }
+
+                try
+                {
+                    boolean ended = false;
+                    while (!ended)
+                    {
+                        Thread.sleep(CHECK_DELAY);
+                        StatoolInfosWeb.instance().check();
+                        if (Thread.currentThread().isInterrupted())
+                        {
+                            logger.error("Interrupted status detected so ending checker.");
+                            ended = true;
+                        }
+                    }
+                }
+                catch (InterruptedException exception)
+                {
+                    logger.error("Check sleep interrupted so ending checker: {}", exception.getMessage());
+                }
+            }
+        };
+        this.checker.start();
+    }
+
+    @Override
+    public void contextDestroyed(ServletContextEvent event)
+    {
+        logger.info("Stopping checker thread.");
+        this.checker.interrupt();
+    }
+}
diff --git a/src/fr/devinsy/statoolinfosweb/StatoolInfosWeb.java b/src/fr/devinsy/statoolinfosweb/StatoolInfosWeb.java
index 8796ef3..d523a04 100644
--- a/src/fr/devinsy/statoolinfosweb/StatoolInfosWeb.java
+++ b/src/fr/devinsy/statoolinfosweb/StatoolInfosWeb.java
@@ -47,6 +47,7 @@ import fr.devinsy.statoolinfos.core.Organization;
 import fr.devinsy.statoolinfos.core.Service;
 import fr.devinsy.statoolinfos.core.Software;
 import fr.devinsy.statoolinfos.core.StatoolInfosContext;
+import fr.devinsy.statoolinfos.core.StatoolInfosException;
 import fr.devinsy.statoolinfos.crawl.CrawlCache;
 import fr.devinsy.statoolinfos.uptime.UptimeJournal;
 import fr.devinsy.xidyn.XidynException;
@@ -179,6 +180,40 @@ public class StatoolInfosWeb
         }
     }
 
+    /**
+     * Check.
+     */
+    public void check()
+    {
+        try
+        {
+            if (this.context.isExpired())
+            {
+                logger.info("Context expired, reloading context…");
+                StatoolInfosContext newContext = new StatoolInfosContext(this.configurationFile);
+                this.context = newContext;
+                clear();
+            }
+            else
+            {
+                logger.info("Context expiration not detected.");
+            }
+        }
+        catch (StatoolInfosException | IOException exception)
+        {
+            logger.error("Context update failed: {}", exception.getMessage());
+            exception.printStackTrace();
+        }
+    }
+
+    /**
+     * Clear caches.
+     */
+    public void clear()
+    {
+        KissDispatcher.instance().clear();
+    }
+
     /**
      * Gets the builds the information.
      *