diff --git a/pom.xml b/pom.xml
index cd8f637..3cea4a6 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
   <groupId>ru.simplex2</groupId>
   <artifactId>vkid_spring_security</artifactId>
-  <version>1.1-SNAPSHOT</version>
+  <version>1.2-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 ddd109c..9373d4d 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
@@ -15,6 +15,7 @@
 import javax.servlet.http.HttpSession;
 import java.io.IOException;
 import java.security.SecureRandom;
+import java.util.Map;
 
 public class VkBeginAuthFilter implements Filter {
     private static final Logger LOG = LoggerFactory.getLogger(VkBeginAuthFilter.class);
@@ -29,8 +30,10 @@
     @Override
     public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException {
         HttpServletRequest httpServletRequest = (HttpServletRequest) request;
-        LOG.debug("REQUEST URI: " + httpServletRequest.getRequestURI());
-        LOG.debug("PARAMETERS MAP: " + request.getParameterMap().toString());
+        LOG.debug("REQUEST URI: {}", httpServletRequest.getRequestURI());
+        LOG.debug("PARAMETERS MAP: {}", request.getParameterMap().toString());
+        LOG.debug("PARAMETER MAP PRETTY: {}", getParameterMapPrettyString(request));
+
         HttpServletResponse httpServletResponse = (HttpServletResponse) response;
         StringKeyGenerator keyGen = () -> {
             BytesKeyGenerator bytesKeyGen = new BytesKeyGenerator() {
@@ -60,6 +63,15 @@
                 + "&state=" + state);
     }
 
+    private StringBuilder getParameterMapPrettyString(ServletRequest request) {
+        StringBuilder resultMapOutputString = new StringBuilder();
+        for (Map.Entry<String, String[]> entry : request.getParameterMap().entrySet()) {
+            String pair = entry.getKey() + " : " + String.join(", ", entry.getValue());
+            resultMapOutputString.append(pair).append(System.lineSeparator());
+        }
+        return resultMapOutputString;
+    }
+
     public VkSettings getVkSettings() {
         return vkSettings;
     }