diff --git a/src/siproxd.h b/src/siproxd.h
index d1c5f86..d26319f 100644
--- a/src/siproxd.h
+++ b/src/siproxd.h
@@ -282,13 +282,13 @@ int unload_plugins(void);
 #define TCP_IDLE_TO	300	/* TCP connection idle timeout in seconds */
 #define TCP_CONNECT_TO	500	/* TCP connect() timeout in msec */
 
-#define URLMAP_SIZE	128	/* number of URL mapping table entries	*/
+#define URLMAP_SIZE	512	/* number of URL mapping table entries	*/
 				/* this limits the number of clients!	*/
 
 #define SOURCECACHE_SIZE 256	/* number of return addresses		*/
 #define DEJITTERLIMIT	1500000	/* max value for dejitter configuration */
 
-#define RTPPROXY_SIZE	256	/* number of rtp proxy entries		*/
+#define RTPPROXY_SIZE	1024	/* number of rtp proxy entries		*/
 				/* this limits the number of calls!	*/
 
 #define BUFFER_SIZE	8196	/* input buffer for read from socket	*/