diff --git a/app/src/main/java/org/ocs/android/actions/OCSProtocol.java b/app/src/main/java/org/ocs/android/actions/OCSProtocol.java
index b37d04e..44415af 100644
--- a/app/src/main/java/org/ocs/android/actions/OCSProtocol.java
+++ b/app/src/main/java/org/ocs/android/actions/OCSProtocol.java
@@ -22,6 +22,7 @@
 
 import android.content.Context;
 import android.os.AsyncTask;
+import android.text.TextUtils;
 
 import org.apache.http.HttpHost;
 import org.apache.http.HttpResponse;
@@ -191,9 +192,13 @@ public String sendmethod(File pFile, String server, boolean gziped) throws OCSPr
         DefaultHttpClient httpClient = getNewHttpClient(OCSSettings.getInstance().isSSLStrict());
 
         if (ocssettings.isProxy()) {
-            ocslog.debug("Use proxy : " + ocssettings.getProxyAdr());
-            HttpHost proxy = new HttpHost(ocssettings.getProxyAdr(), ocssettings.getProxyPort());
-            httpClient.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY, proxy);
+            if(!TextUtils.isEmpty(ocssettings.getProxyAdr())){
+                ocslog.debug("Use proxy : " + ocssettings.getProxyAdr());
+                HttpHost proxy = new HttpHost(ocssettings.getProxyAdr(), ocssettings.getProxyPort());
+                httpClient.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY, proxy);
+            }else{
+                ocslog.debug("Invalid proxy settings");
+            }
         }
         if (ocssettings.isAuth()) {
             ocslog.debug("Use AUTH : " + ocssettings.getLogin() + "/*****");
diff --git a/app/src/main/res/values/strings_nt.xml b/app/src/main/res/values/strings_nt.xml
index 4369cf8..93d4fff 100644
--- a/app/src/main/res/values/strings_nt.xml
+++ b/app/src/main/res/values/strings_nt.xml
@@ -29,6 +29,6 @@
     <string name="pref_default_cachelen" translatable="false">900000</string>
 
     <string name="comp_useragent" translatable="false">OCS-NG_Android_agent_v2.0</string>
-    <string name="useragent" translatable="false">OCS-NG_Android_agent_v2.3</string>
+    <string name="useragent" translatable="false">OCS-NG_Android_agent_v2.3.1</string>
     <string name="point" translatable="false">.</string>
 </resources>
\ No newline at end of file