diff --git a/Basic/constants.properties b/Basic/constants.properties
index 2cd5a28c..84884e51 100644
--- a/Basic/constants.properties
+++ b/Basic/constants.properties
@@ -1,7 +1,7 @@
 cordaReleaseGroup=net.corda
 cordaCoreReleaseGroup=net.corda
-cordaVersion=4.6
-cordaCoreVersion=4.6
+cordaVersion=4.8
+cordaCoreVersion=4.8
 gradlePluginsVersion=5.0.12
 kotlinVersion=1.2.71
 junitVersion=4.12
diff --git a/Basic/ping-pong/README.md b/Basic/ping-pong/README.md
index e61f1985..999eded2 100644
--- a/Basic/ping-pong/README.md
+++ b/Basic/ping-pong/README.md
@@ -108,3 +108,10 @@ You should see the following message, indicating that PartyB responded to your p
 
     `Successfully pinged O=PartyB,L=New York,C=US.`.
 
+### Appendix - Signing jar
+Refer to: [https://training.corda.net/operations/package-jar/](https://training.corda.net/operations/package-jar/)
+Generate key
+```
+keytool -keystore jar-sign-keystore.jks -keyalg RSA -genkey -dname "OU=Corda Network, O=Corda Consortium, L=New York, C=US" -storepass password -keypass password -alias awesome-cordapp-signer -validity 3650
+keytool -importkeystore -srckeystore jar-sign-keystore.jks -destkeystore jar-sign-keystore.pkcs12 -deststoretype pkcs12
+```
\ No newline at end of file
diff --git a/Basic/ping-pong/jar-sign-keystore.jks b/Basic/ping-pong/jar-sign-keystore.jks
new file mode 100644
index 00000000..bd0ba469
Binary files /dev/null and b/Basic/ping-pong/jar-sign-keystore.jks differ
diff --git a/Basic/ping-pong/jar-sign-keystore.pkcs12 b/Basic/ping-pong/jar-sign-keystore.pkcs12
new file mode 100644
index 00000000..77cf0972
Binary files /dev/null and b/Basic/ping-pong/jar-sign-keystore.pkcs12 differ
diff --git a/Basic/ping-pong/workflows/build.gradle b/Basic/ping-pong/workflows/build.gradle
index a555eff6..d931b3e7 100644
--- a/Basic/ping-pong/workflows/build.gradle
+++ b/Basic/ping-pong/workflows/build.gradle
@@ -1,15 +1,27 @@
 apply plugin: 'net.corda.plugins.cordapp'
 apply plugin: 'net.corda.plugins.quasar-utils'
 
+def keystoreFile = new File('../jar-sign-keystore.pkcs12')
+
 cordapp {
     targetPlatformVersion corda_platform_version
     minimumPlatformVersion corda_platform_version
     workflow {
-        name "Pingpng Flows"
+        name "Pingpong Flows"
         vendor "Corda Open Source"
         licence "Apache License, Version 2.0"
         versionId 1
     }
+    signing {
+        enabled true
+        options {
+            keystore keystoreFile.absolutePath
+            alias "awesome-cordapp-signer"
+            storepass "password"
+            keypass "password"
+            storetype "PKCS12"
+        }
+    }
 }
 
 sourceSets {
diff --git a/Basic/ping-pong/workflows/src/main/java/net/corda/samples/pingpong/flows/Ping.java b/Basic/ping-pong/workflows/src/main/java/net/corda/samples/pingpong/flows/Ping.java
index b70ef4ed..774b3f6f 100644
--- a/Basic/ping-pong/workflows/src/main/java/net/corda/samples/pingpong/flows/Ping.java
+++ b/Basic/ping-pong/workflows/src/main/java/net/corda/samples/pingpong/flows/Ping.java
@@ -19,8 +19,10 @@ public Ping(Party counterparty) {
     @Override
     public Void call() throws FlowException {
         final FlowSession counterpartySession = initiateFlow(counterparty);
+        getLogger().info("Pinging "+counterparty);
         final UntrustworthyData<String> counterpartyData = counterpartySession.sendAndReceive(String.class, "ping");
         counterpartyData.unwrap( msg -> {
+            getLogger().info("Received "+msg+" from "+counterpartySession.getCounterparty().getName());
             assert(msg.equals("pong"));
             return true;
         });
diff --git a/Basic/ping-pong/workflows/src/main/java/net/corda/samples/pingpong/flows/Pong.java b/Basic/ping-pong/workflows/src/main/java/net/corda/samples/pingpong/flows/Pong.java
index 972b149e..687df621 100644
--- a/Basic/ping-pong/workflows/src/main/java/net/corda/samples/pingpong/flows/Pong.java
+++ b/Basic/ping-pong/workflows/src/main/java/net/corda/samples/pingpong/flows/Pong.java
@@ -22,9 +22,11 @@ public Pong(FlowSession counterpartySession) {
     public Void call() throws FlowException {
         UntrustworthyData<String> counterpartyData = counterpartySession.receive(String.class);
         counterpartyData.unwrap(msg -> {
+            getLogger().info("Received "+msg + " from "+counterpartySession.getCounterparty().getName());
             assert (msg.equals("ping"));
             return true;
         });
+        getLogger().info("Ponging "+counterpartySession.getCounterparty().getName());
         counterpartySession.send("pong");
         return null;
     }