diff --git a/src/main/java/eu/m724/jarupdater/download/SimpleDownloader.java b/src/main/java/eu/m724/jarupdater/download/SimpleDownloader.java
index ca74fd3..f76b36b 100644
--- a/src/main/java/eu/m724/jarupdater/download/SimpleDownloader.java
+++ b/src/main/java/eu/m724/jarupdater/download/SimpleDownloader.java
@@ -33,7 +33,7 @@ public class SimpleDownloader implements Downloader {
 		
 		HttpRequest request = HttpRequest.newBuilder()
 				.uri(URI.create(url))
-				.header("User-Agent", "rwu/1") // real weather updater v1
+				.header("User-Agent", "ju/1") // jar updater v1
 				.build();
 		
 		CompletableFuture<HttpResponse<InputStream>> responseFuture =
diff --git a/src/main/java/eu/m724/jarupdater/object/Version.java b/src/main/java/eu/m724/jarupdater/object/Version.java
index d648b23..587d093 100644
--- a/src/main/java/eu/m724/jarupdater/object/Version.java
+++ b/src/main/java/eu/m724/jarupdater/object/Version.java
@@ -8,20 +8,23 @@ public class Version {
 	 */
 	public static final int SPEC = 1;
 
-	public Version(int id, long timestamp, String label, String fileUrl, String sha256) {
+	public Version(int id, long timestamp, String label, String fileUrl, String changelogUrl, String sha256) {
 		this.id = id;
 		this.timestamp = timestamp;
 		this.label = label;
 		this.fileUrl = fileUrl;
+		this.changelogUrl = changelogUrl;
 		this.sha256 = sha256;
 	}
 
-	private int id;
-	private long timestamp;
-	private String label;
+	private final int id;
+	private final long timestamp;
+	private final String label;
 	@SerializedName("file")
-	private String fileUrl;
-	private String sha256;
+	private final String fileUrl;
+	@SerializedName("changelog")
+	private final String changelogUrl;
+	private final String sha256;
 
 	/**
 	 * version id. increments with each version
@@ -38,7 +41,7 @@ public class Version {
 	}
 
 	/**
-	 * label aka version string
+	 * label aka version string<br>
 	 * example: 1.0.0
 	 */
 	public String getLabel() {
@@ -52,6 +55,13 @@ public class Version {
 		return fileUrl;
 	}
 
+	/**
+	 * url of changelog file
+	 */
+	public String getChangelogUrl() {
+		return changelogUrl;
+	}
+
 	/**
 	 * sha256 hash of that file
 	 */