diff --git a/build.gradle b/build.gradle
index b58f4ca..39c49f3 100644
--- a/build.gradle
+++ b/build.gradle
@@ -14,8 +14,12 @@ dependencies {
     implementation 'com.squareup.retrofit2:converter-gson:2.4.0'
 
     // https://mvnrepository.com/artifact/org.bouncycastle/bcprov-jdk15on
-    compile group: 'org.bouncycastle', name: 'bcprov-jdk15on', version: '1.60'
+    implementation group: 'org.bouncycastle', name: 'bcprov-jdk15on', version: '1.61'
 
     // https://mvnrepository.com/artifact/org.web3j/crypto
-    compile group: 'org.web3j', name: 'crypto', version: '3.0.1'
+    implementation group: 'org.web3j', name: 'crypto', version: '3.0.1'
+    
+    // https://mvnrepository.com/artifact/com.google.code.gson/gson
+    implementation group: 'com.google.code.gson', name: 'gson', version: '2.7'
+
 }
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 144f721..2b712ef 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.0-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-all.zip
diff --git a/settings.gradle b/settings.gradle
index 42bb475..cedfcad 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -1,2 +1,2 @@
-rootProject.name = 'java'
+rootProject.name = 'iost-java-sdk'