diff --git a/build.gradle b/build.gradle
index 680fb30..97445b3 100644
--- a/build.gradle
+++ b/build.gradle
@@ -28,7 +28,7 @@ dependencies {
     api 'berkeleydb:je:3.2.76'
  //   api 'com.fifesoft:rsyntaxtextarea:3.1.3'
     api 'commons-io:commons-io:2.11.0'
-    api 'io.netty:netty-all:4.1.63.Final'
+    api 'io.netty:netty-all:4.1.72.Final'
     api 'org.antlr:antlr4:4.9.2'
     api 'commons-codec:commons-codec:1.5'
     api 'org.apache.logging.log4j:log4j-core:2.17.2'
diff --git a/src/main/base/org/bdware/sc/ContractPort.java b/src/main/base/org/bdware/sc/ContractPort.java
index cab0e12..b82c2fe 100644
--- a/src/main/base/org/bdware/sc/ContractPort.java
+++ b/src/main/base/org/bdware/sc/ContractPort.java
@@ -119,5 +119,6 @@ public class ContractPort {
          * @return whether some program listens to the port
          */
         boolean visit(int port);
+        boolean visit(String host,int port);
     }
 }