diff --git a/core/src/main/java/fi/iki/elonen/NanoHTTPD.java b/core/src/main/java/fi/iki/elonen/NanoHTTPD.java
index <HASH>..<HASH> 100644
--- a/core/src/main/java/fi/iki/elonen/NanoHTTPD.java
+++ b/core/src/main/java/fi/iki/elonen/NanoHTTPD.java
@@ -1102,9 +1102,12 @@ public abstract class NanoHTTPD {
             FORBIDDEN(403, "Forbidden"),
             NOT_FOUND(404, "Not Found"),
             METHOD_NOT_ALLOWED(405, "Method Not Allowed"),
+            NOT_ACCEPTABLE(406, "Not Acceptable"),
             REQUEST_TIMEOUT(408, "Request Timeout"),
+            CONFLICT(409, "Conflict"),
             RANGE_NOT_SATISFIABLE(416, "Requested Range Not Satisfiable"),
             INTERNAL_ERROR(500, "Internal Server Error"),
+            NOT_IMPLEMENTED(501, "Not Implemented"),
             UNSUPPORTED_HTTP_VERSION(505, "HTTP Version Not Supported");
 
             private final int requestStatus;
Added some HTTP status codes. Closes #<I>