diff --git a/modules/type/blocks/include/dap_chain_cs_blocks.h b/modules/type/blocks/include/dap_chain_cs_blocks.h
index 7ffbaf4d63249c13a7266d6d4d4c08fc59149815..4e1cf5494e0e1dc5d23a39bbd55b79853362a7a7 100644
--- a/modules/type/blocks/include/dap_chain_cs_blocks.h
+++ b/modules/type/blocks/include/dap_chain_cs_blocks.h
@@ -29,7 +29,7 @@
 #ifdef DAP_TPS_TEST
 #define DAP_CHAIN_CS_BLOCKS_MAX_BLOCK_SIZE (100 * 1024 * 1024)
 #else
-#define DAP_CHAIN_CS_BLOCKS_MAX_BLOCK_SIZE (1 * 1024 * 1024)    // 1 Mb
+#define DAP_CHAIN_CS_BLOCKS_MAX_BLOCK_SIZE (256 * 1024) // 256 KB
 #endif
 
 typedef struct dap_chain_cs_blocks dap_chain_cs_blocks_t;