diff --git a/build.gradle b/build.gradle
index b0b25b2..b33b9c9 100644
--- a/build.gradle
+++ b/build.gradle
@@ -50,9 +50,9 @@ dependencies {
     implementation 'org.bitcoinj:bitcoinj-core:0.14.7'
     implementation 'com.squareup.okhttp3:okhttp:3.11.0'
 
-    testCompile "junit:junit:4.12"
+    testCompile "junit:junit:4.13.1"
     testCompile "org.mockito:mockito-core:1.+"
     testCompile "org.hamcrest:hamcrest-all:1.3"
 
-    testImplementation 'junit:junit:4.12'
+    testImplementation 'junit:junit:4.13.1'
 }