diff --git a/app/build.gradle b/app/build.gradle
index 91d952fd..d53b1728 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -7,8 +7,8 @@ android {
         applicationId "com.m2049r.xmrwallet"
         minSdkVersion 21
         targetSdkVersion 28
-        versionCode 173
-        versionName "1.11.3 'Chernushka'"
+        versionCode 174
+        versionName "1.11.4 'Chernushka'"
 
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
         externalNativeBuild {
diff --git a/external-libs/monero/include/wallet2_api.h b/external-libs/monero/include/wallet2_api.h
index ec1a8487..ad6735ce 100644
--- a/external-libs/monero/include/wallet2_api.h
+++ b/external-libs/monero/include/wallet2_api.h
@@ -574,6 +574,12 @@ struct Wallet
     */
     virtual uint64_t approximateBlockChainHeight() const = 0;
 
+    /**
+    * @brief estimateBlockChainHeight - returns estimate blockchain height. More accurate than approximateBlockChainHeight,
+    *                                   uses daemon height and falls back to calculation from date/time
+    * @return
+    **/ 
+    virtual uint64_t estimateBlockChainHeight() const = 0;
     /**
      * @brief daemonBlockChainHeight - returns daemon blockchain height
      * @return 0 - in case error communicating with the daemon.