diff --git a/app/build.gradle b/app/build.gradle
index 5d276d4..91b18b0 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -159,7 +159,7 @@
     implementation('net.named-data.jndn-extra:jndn-management:1.2.0') {
         exclude group: 'net.named-data', module: 'jndn'
     }
-    implementation('net.named-data:jndn-android:0.20') {
+    implementation('net.named-data:jndn-android:0.21') {
         exclude group: 'org.xerial'
         exclude group: 'com.google.android'
     }
diff --git a/build.gradle b/build.gradle
index 1ce4004..945872d 100644
--- a/build.gradle
+++ b/build.gradle
@@ -9,7 +9,7 @@
         }
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.3.2'
+        classpath 'com.android.tools.build:gradle:3.4.0'
         // classpath 'net.named-data.playground:play-publisher:1.2.0-2-SNAPSHOT'
         classpath 'com.github.triplet.gradle:play-publisher:1.2.0'
 
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 38aa7b8..d2b2edb 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,4 @@
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-all.zip