diff --git a/app/build.gradle b/app/build.gradle
index 0aa2c8f..3787f8e 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -7,8 +7,8 @@ android {
         applicationId "com.m2049r.xmrwallet"
         minSdkVersion 21
         targetSdkVersion 25
-        versionCode 90
-        versionName "1.5.0 'CrAzYpass'"
+        versionCode 91
+        versionName "1.5.1 'CrAzY Nacho'"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
         externalNativeBuild {
             cmake {
diff --git a/external-libs/monero/include/wallet2_api.h b/external-libs/monero/include/wallet2_api.h
index d4e41c5..617b603 100644
--- a/external-libs/monero/include/wallet2_api.h
+++ b/external-libs/monero/include/wallet2_api.h
@@ -956,25 +956,25 @@ struct WalletManager
     virtual void setDaemonAddress(const std::string &address) = 0;
 
     //! returns whether the daemon can be reached, and its version number
-    virtual bool connected(uint32_t *version = NULL) const = 0;
+    virtual bool connected(uint32_t *version = NULL) = 0;
 
     //! returns current blockchain height
-    virtual uint64_t blockchainHeight() const = 0;
+    virtual uint64_t blockchainHeight() = 0;
 
     //! returns current blockchain target height
-    virtual uint64_t blockchainTargetHeight() const = 0;
+    virtual uint64_t blockchainTargetHeight() = 0;
 
     //! returns current network difficulty
-    virtual uint64_t networkDifficulty() const = 0;
+    virtual uint64_t networkDifficulty() = 0;
 
     //! returns current mining hash rate (0 if not mining)
-    virtual double miningHashRate() const = 0;
+    virtual double miningHashRate() = 0;
 
     //! returns current block target
-    virtual uint64_t blockTarget() const = 0;
+    virtual uint64_t blockTarget() = 0;
 
     //! returns true iff mining
-    virtual bool isMining() const = 0;
+    virtual bool isMining() = 0;
 
     //! starts mining with the set number of threads
     virtual bool startMining(const std::string &address, uint32_t threads = 1, bool background_mining = false, bool ignore_battery = true) = 0;