diff --git a/CanUds.h b/CanUds.h
index 0cae96c..b343f3f 100644
--- a/CanUds.h
+++ b/CanUds.h
@@ -165,7 +165,7 @@ typedef struct {
         uint32_t time_counter_max_attempts_default;
     } SA;
 
-    tStaticThreadBlock(512) T_can_Uds;
+    tStaticThreadBlock(256) T_can_Uds;
 } tCanUds;
 
 typedef uint16_t (*uds_func_ptr)(tCanUds *env);