diff --git a/slsSupportLib/include/sls/sls_detector_defs.h b/slsSupportLib/include/sls/sls_detector_defs.h
index 99b31ba13..9a145700b 100644
--- a/slsSupportLib/include/sls/sls_detector_defs.h
+++ b/slsSupportLib/include/sls/sls_detector_defs.h
@@ -45,8 +45,8 @@
 
 #define MAX_UDP_DESTINATION 32
 
-#define SLS_DETECTOR_HEADER_VERSION      0x3
-#define SLS_DETECTOR_JSON_HEADER_VERSION 0x5
+#define SLS_DETECTOR_HEADER_VERSION      0x2
+#define SLS_DETECTOR_JSON_HEADER_VERSION 0x4
 
 // ctb/ moench 1g udp (read from fifo)
 #define UDP_PACKET_DATA_BYTES (1344)