diff --git a/.github/workflows/publish.yaml b/.github/workflows/publish.yaml
index 6fd02c1..def14a9 100644
--- a/.github/workflows/publish.yaml
+++ b/.github/workflows/publish.yaml
@@ -10,7 +10,7 @@ jobs:
       - name: Set up Maven Central Repository
         uses: actions/setup-java@v2
         with:
-          java-version: '11'
+          java-version: '17'
           distribution: 'adopt'
           server-id: ossrh
           server-username: MAVEN_USERNAME
@@ -22,4 +22,4 @@ jobs:
         env:
           MAVEN_USERNAME: ${{ secrets.OSSRH_USERNAME }}
           MAVEN_PASSWORD: ${{ secrets.OSSRH_TOKEN }}
-          MAVEN_GPG_PASSPHRASE: ${{ secrets.MAVEN_GPG_PASSPHRASE }}
\ No newline at end of file
+          MAVEN_GPG_PASSPHRASE: ${{ secrets.MAVEN_GPG_PASSPHRASE }}
diff --git a/README.md b/README.md
index dcc2425..5d0c81c 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,6 @@ Logitech Harmony WebSocket Client
 
 License EPL v2.0
 
-[![TravisCI Build Status](https://travis-ci.org/digitaldan/harmony-client.svg?branch=master)](https://travis-ci.org/digitaldan/harmony-client)
 # Running
 
 `mvn clean compile assembly:single`
diff --git a/pom.xml b/pom.xml
index 535590e..95ba62f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,13 +4,12 @@
 	<groupId>com.github.digitaldan</groupId>
 	<artifactId>harmony-client</artifactId>
 	<packaging>jar</packaging>
-	<version>1.1.6</version>
+	<version>1.1.7</version>
 	<name>Harmony Client</name>
 	<description>Logitech Harmony WebSocket Client</description>
 	<url>https://github.com/digitaldan/harmony-client</url>
 	<properties>
-		<maven.compiler.target>1.8</maven.compiler.target>
-		<maven.compiler.source>1.8</maven.compiler.source>
+		<maven.compiler.release>17</maven.compiler.release>
 	</properties>
 	<licenses>
 		<license>
@@ -42,7 +41,7 @@
 					<plugin>
 						<groupId>org.apache.maven.plugins</groupId>
 						<artifactId>maven-gpg-plugin</artifactId>
-						<version>3.0.1</version>
+						<version>3.2.3</version>
 						<configuration>
 							<!-- Prevent gpg from using pinentry programs -->
 							<gpgArguments>
@@ -63,7 +62,7 @@
 					<plugin>
 						<groupId>org.sonatype.plugins</groupId>
 						<artifactId>nexus-staging-maven-plugin</artifactId>
-						<version>1.6.2</version>
+						<version>1.6.6</version>
 						<extensions>true</extensions>
 						<configuration>
 							<serverId>ossrh</serverId>
@@ -87,7 +86,7 @@
 					<plugin>
 						<groupId>org.apache.maven.plugins</groupId>
 						<artifactId>maven-gpg-plugin</artifactId>
-						<version>3.0.1</version>
+						<version>3.2.3</version>
 						<configuration>
 							<!-- Prevent gpg from using pinentry programs -->
 							<gpgArguments>
@@ -124,7 +123,7 @@
 			<plugin>
 				<groupId>biz.aQute.bnd</groupId>
 				<artifactId>bnd-maven-plugin</artifactId>
-				<version>4.2.0</version>
+				<version>7.0.0</version>
 				<executions>
 					<execution>
 						<goals>
@@ -135,7 +134,7 @@
 			</plugin>
 			<plugin>
 				<artifactId>maven-jar-plugin</artifactId>
-				<version>2.6</version>
+				<version>3.3.0</version>
 				<configuration>
 					<archive>
 						<manifestFile>${project.build.outputDirectory}/META-INF/MANIFEST.MF</manifestFile>
@@ -158,7 +157,7 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-source-plugin</artifactId>
-				<version>2.2.1</version>
+				<version>3.3.0</version>
 				<executions>
 					<execution>
 						<id>attach-sources</id>
diff --git a/src/main/java/com/digitaldan/harmony/HarmonyClient.java b/src/main/java/com/digitaldan/harmony/HarmonyClient.java
index 37617cb..1f51160 100644
--- a/src/main/java/com/digitaldan/harmony/HarmonyClient.java
+++ b/src/main/java/com/digitaldan/harmony/HarmonyClient.java
@@ -206,7 +206,7 @@ public CompletableFuture<Activity> getCurrentActivity() {
         final CompletableFuture<Activity> future = new CompletableFuture<Activity>();
         if (this.currentActivity == null) {
             sendMessage(new GetCurrentActivityMessage.GetCurrentActivityRequestMessage()).thenAccept(m -> {
-                int activityId = ((GetCurrentActivityMessage.GetCurrentActivityResponseMessage) m).getActivityId();
+                String activityId = ((GetCurrentActivityMessage.GetCurrentActivityResponseMessage) m).getActivityId();
                 this.currentActivity = this.cachedConfig.getActivityById(activityId);
                 future.complete(this.currentActivity);
             });
@@ -223,10 +223,10 @@ public CompletableFuture<Activity> getCurrentActivity() {
      * @return {@link CompletableFuture}
      * @throws IllegalArgumentException if activity does not exist
      */
-    public CompletableFuture<?> startActivity(int activityId) throws IllegalArgumentException {
+    public CompletableFuture<?> startActivity(String activityId) throws IllegalArgumentException {
         if (cachedConfig != null) {
             if (cachedConfig.getActivityById(activityId) == null) {
-                throw new IllegalArgumentException(String.format("Unknown activity '%d'", activityId));
+                throw new IllegalArgumentException(String.format("Unknown activity '%s'", activityId));
             }
             return sendMessage(new StartActivityMessage.StartActivityRequestMessage(activityId,
                     System.currentTimeMillis() - connectedTime));
diff --git a/src/main/java/com/digitaldan/harmony/config/Activity.java b/src/main/java/com/digitaldan/harmony/config/Activity.java
index a8a979f..71928f4 100644
--- a/src/main/java/com/digitaldan/harmony/config/Activity.java
+++ b/src/main/java/com/digitaldan/harmony/config/Activity.java
@@ -12,7 +12,7 @@
 public class Activity {
     private String label;
     private String suggestedDisplay;
-    private Integer id;
+    private String id;
     private String activityTypeDisplayName;
     private List<ControlGroup> controlGroup = new ArrayList<>();
     private Integer activityOrder;
@@ -56,11 +56,11 @@ public void setSuggestedDisplay(String suggestedDisplay) {
         this.suggestedDisplay = suggestedDisplay;
     }
 
-    public Integer getId() {
+    public String getId() {
         return id;
     }
 
-    public void setId(Integer id) {
+    public void setId(String id) {
         this.id = id;
     }
 
@@ -130,6 +130,6 @@ public void setBaseImageUri(String baseImageUri) {
 
     @Override
     public String toString() {
-        return format("Activity[%d]:%s", getId(), getLabel());
+        return format("Activity[%s]:%s", getId(), getLabel());
     }
 }
diff --git a/src/main/java/com/digitaldan/harmony/config/HarmonyConfig.java b/src/main/java/com/digitaldan/harmony/config/HarmonyConfig.java
index b74d8be..d6ba2a1 100644
--- a/src/main/java/com/digitaldan/harmony/config/HarmonyConfig.java
+++ b/src/main/java/com/digitaldan/harmony/config/HarmonyConfig.java
@@ -66,9 +66,9 @@ public void setGlobal(Global global) {
         this.global = global;
     }
 
-    public Activity getActivityById(int result) {
+    public Activity getActivityById(String result) {
         for (Activity activity : activities) {
-            if (activity.getId() == result) {
+            if (activity.getId().equals(result)) {
                 return activity;
             }
         }
diff --git a/src/main/java/com/digitaldan/harmony/messages/ActivityFinishedMessage.java b/src/main/java/com/digitaldan/harmony/messages/ActivityFinishedMessage.java
index 16bde64..db12b6d 100644
--- a/src/main/java/com/digitaldan/harmony/messages/ActivityFinishedMessage.java
+++ b/src/main/java/com/digitaldan/harmony/messages/ActivityFinishedMessage.java
@@ -17,7 +17,7 @@ public ActivityFinished getActivityFinished() {
     }
 
     public static class ActivityFinished {
-        Integer activityId;
+        String activityId;
         Integer errorCode;
         String errorString;
 
@@ -25,7 +25,7 @@ public ActivityFinished() {
 
         }
 
-        public Integer getActivityId() {
+        public String getActivityId() {
             return activityId;
         }
 
diff --git a/src/main/java/com/digitaldan/harmony/messages/DigestMessage.java b/src/main/java/com/digitaldan/harmony/messages/DigestMessage.java
index 63bddfa..e711499 100644
--- a/src/main/java/com/digitaldan/harmony/messages/DigestMessage.java
+++ b/src/main/java/com/digitaldan/harmony/messages/DigestMessage.java
@@ -50,14 +50,8 @@ public class Digest {
         private Integer configVersion;
         private String accountId;
 
-        public Integer getActivityId() {
-            if (activityId != null) {
-                try {
-                    return Integer.parseInt(activityId);
-                } catch (NumberFormatException ignored) {
-                }
-            }
-            return null;
+        public String getActivityId() {
+            return activityId;
         }
 
         public Status getActivityStatus() {
diff --git a/src/main/java/com/digitaldan/harmony/messages/GetCurrentActivityMessage.java b/src/main/java/com/digitaldan/harmony/messages/GetCurrentActivityMessage.java
index 06e387a..b82ec5e 100644
--- a/src/main/java/com/digitaldan/harmony/messages/GetCurrentActivityMessage.java
+++ b/src/main/java/com/digitaldan/harmony/messages/GetCurrentActivityMessage.java
@@ -33,12 +33,8 @@ public GetCurrentActivityResponseMessage(int code, String id, String msg) {
             super(code, id, msg);
         }
 
-        public int getActivityId() {
-            try {
-                return Integer.parseInt(currentActivityResult.result);
-            } catch (Exception e) {
-                return -1;
-            }
+        public String getActivityId() {
+            return currentActivityResult.result;
         }
 
         private class CurrentActivityResult {
diff --git a/src/main/java/com/digitaldan/harmony/messages/StartActivityMessage.java b/src/main/java/com/digitaldan/harmony/messages/StartActivityMessage.java
index b51dc7f..295a1be 100644
--- a/src/main/java/com/digitaldan/harmony/messages/StartActivityMessage.java
+++ b/src/main/java/com/digitaldan/harmony/messages/StartActivityMessage.java
@@ -10,11 +10,11 @@ public static class StartActivityRequestMessage extends RequestMessage {
 
         HashMap<String, Object> params = new HashMap<>();
 
-        public StartActivityRequestMessage(int activityId, long timeStamp) {
+        public StartActivityRequestMessage(String activityId, long timeStamp) {
             super(MIME_TYPE);
             HashMap<String, Object> args = new HashMap<>();
             args.put("rule", "start");
-            params.put("activityId", String.valueOf(activityId));
+            params.put("activityId", activityId);
             params.put("timeStamp", timeStamp);
             params.put("args", args);
         }
diff --git a/src/main/java/com/digitaldan/harmony/shell/StartActivityCommand.java b/src/main/java/com/digitaldan/harmony/shell/StartActivityCommand.java
index fc7c3d8..41ff15e 100644
--- a/src/main/java/com/digitaldan/harmony/shell/StartActivityCommand.java
+++ b/src/main/java/com/digitaldan/harmony/shell/StartActivityCommand.java
@@ -11,8 +11,8 @@ public class StartActivityCommand extends ShellCommand {
     @Override
     public void execute(HarmonyClient harmonyClient) {
         try {
-            harmonyClient.startActivity(Integer.parseInt(activity));
-        } catch (NumberFormatException e) {
+            harmonyClient.startActivity(activity);
+        } catch (IllegalArgumentException e) {
             harmonyClient.startActivityByName(activity);
         }
         println("Activity %s started", activity);