diff --git a/pom.xml b/pom.xml
index d087457..cd8f637 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
   <groupId>ru.simplex2</groupId>
   <artifactId>vkid_spring_security</artifactId>
-  <version>1.0</version>
+  <version>1.1-SNAPSHOT</version>
 
   <name>vkid_spring_security</name>
   <description>A simple vkid_spring_security.</description>
diff --git a/src/main/java/ru/simplex2/vkid_spring_security/vk/VkBeginAuthFilter.java b/src/main/java/ru/simplex2/vkid_spring_security/vk/VkBeginAuthFilter.java
index a8c2add..ddd109c 100644
--- a/src/main/java/ru/simplex2/vkid_spring_security/vk/VkBeginAuthFilter.java
+++ b/src/main/java/ru/simplex2/vkid_spring_security/vk/VkBeginAuthFilter.java
@@ -52,6 +52,8 @@
         String state = keyGen.generateKey();
         HttpSession httpSession = httpServletRequest.getSession();
         httpSession.setAttribute(VkEndAuthFilter.STATE_ATTRIBUTE_KEY, state);
+        LOG.debug("VkBeginAuthFilter, Session id is {}", httpServletRequest.getSession().getId());
+        LOG.debug("VkBeginAuthFilter, state is {}", state);
         httpServletResponse.sendRedirect("https://id.vk.ru/authorize?response_type=code&client_id=" + vkSettings.getClientId()
                 + "&scope=email&redirect_uri=" + vkSettings.getRedirectUri()
                 + "&code_challenge_method=S256&code_challenge=" + vkSettings.generateCodeChallenge(vkSettings.generateCodeVerifier())
diff --git a/src/main/java/ru/simplex2/vkid_spring_security/vk/VkEndAuthFilter.java b/src/main/java/ru/simplex2/vkid_spring_security/vk/VkEndAuthFilter.java
index c02179a..64cc6b1 100644
--- a/src/main/java/ru/simplex2/vkid_spring_security/vk/VkEndAuthFilter.java
+++ b/src/main/java/ru/simplex2/vkid_spring_security/vk/VkEndAuthFilter.java
@@ -55,6 +55,8 @@
 
     public Authentication attemptAuthentication(HttpServletRequest request, HttpServletResponse response) throws AuthenticationException, IOException {
         Map<String, String[]> parameterMap = request.getParameterMap();
+        LOG.debug("VkEndAuthFilter, Session id is {}", request.getSession().getId());
+        LOG.debug("VkEndAUthFilter, state attribute is {}", request.getSession().getAttribute(STATE_ATTRIBUTE_KEY));
         String stateFromSession = request.getSession().getAttribute(STATE_ATTRIBUTE_KEY).toString();
         if (!stateFromSession.equals(parameterMap.get("state")[0])) {
             String errorMessage = "Wrong state!";