readme adapted for old TLD #233
diff --git a/README.md b/README.md
index e7835a0..4eacb5c 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@
 Edit `pom.xml`, and add this between \<dependencies\>:
  
 	<dependency>
-		<groupId>org.nanohttpd</groupId>
+		<groupId>org.nanohttpd</groupId> <!-- <groupId>com.nanohttpd</groupId> for 2.1.0 and earlier -->
 		<artifactId>nanohttpd</artifactId>
 		<version>2.2.0-SNAPSHOT</version>
 	</dependency>
@@ -141,7 +141,7 @@
 
 	<dependencies>
 		<dependency>
-			<groupId>org.nanohttpd</groupId>
+			<groupId>org.nanohttpd</groupId> <!-- <groupId>com.nanohttpd</groupId> for 2.1.0 and earlier -->
 			<artifactId>nanohttpd</artifactId>
 			<version>CURRENT_VERSION</version>
 		</dependency>
@@ -158,7 +158,7 @@
 For a specialized HTTP (HTTPS) service you can use the module with artifactId *nanohttpd*.
 
 		<dependency>
-			<groupId>org.nanohttpd</groupId>
+			<groupId>org.nanohttpd</groupId> <!-- <groupId>com.nanohttpd</groupId> for 2.1.0 and earlier -->
 			<artifactId>nanohttpd</artifactId>
 			<version>CURRENT_VERSION</version>
 		</dependency>
@@ -170,7 +170,7 @@
 For a specialized websocket service you can use the module with artifactId *nanohttpd-websocket*.
 
 		<dependency>
-			<groupId>org.nanohttpd</groupId>
+			<groupId>org.nanohttpd</groupId> <!-- <groupId>com.nanohttpd</groupId> for 2.1.0 and earlier -->
 			<artifactId>nanohttpd-websocket</artifactId>
 			<version>CURRENT_VERSION</version>
 		</dependency>