diff --git a/include/Configuration.h b/include/Configuration.h
index c4e5d26..7f3d7db 100644
--- a/include/Configuration.h
+++ b/include/Configuration.h
@@ -27,7 +27,7 @@
 
 #define CHAN_MAX_NAME_STRLEN 31
 
-#define DEV_MAX_MAPPING_NAME_STRLEN 31
+#define DEV_MAX_MAPPING_NAME_STRLEN 63
 
 #define JSON_BUFFER_SIZE 6144