diff --git a/dap-sdk b/dap-sdk
index 48ad279825c269200cb4a86c36d32d9bf15f2949..9a4290d80e07e8a2192477ae013cea9d78ce2cba 160000
--- a/dap-sdk
+++ b/dap-sdk
@@ -1 +1 @@
-Subproject commit 48ad279825c269200cb4a86c36d32d9bf15f2949
+Subproject commit 9a4290d80e07e8a2192477ae013cea9d78ce2cba
diff --git a/modules/net/dap_chain_node_cli_cmd.c b/modules/net/dap_chain_node_cli_cmd.c
index 12e8342a63d10bb586c7de019674f9b091e90a4e..6e99d9415169af1640c059de5a28544b118845ee 100644
--- a/modules/net/dap_chain_node_cli_cmd.c
+++ b/modules/net/dap_chain_node_cli_cmd.c
@@ -1259,6 +1259,7 @@ int com_node(int a_argc, char ** a_argv, void **a_str_reply)
     } break;
 
     case CMD_CONNECTIONS: {
+
         if (l_net) {
             dap_cluster_t *l_links_cluster = dap_cluster_by_mnemonim(l_net->pub.name);
             if (!l_links_cluster) {
@@ -1271,8 +1272,14 @@ int com_node(int a_argc, char ** a_argv, void **a_str_reply)
             dap_cluster_t *l_cluster = NULL;
             dap_cli_server_cmd_find_option_val(a_argv, arg_index, a_argc, "-cluster", &l_guuid_str);
             if (l_guuid_str) {
-                dap_guuid_t l_guuid = dap_guuid_from_hex_str(l_guuid_str);
+                bool l_success = false;
+                dap_guuid_t l_guuid = dap_guuid_from_hex_str(l_guuid_str, &l_success);
+                if (!l_success) {
+                    dap_cli_server_cmd_set_reply_text(a_str_reply, "Can't parse cluster guid %s", l_guuid_str);
+                    break;
+                }
                 l_cluster = dap_cluster_find(l_guuid);
+                
                 if (!l_cluster) {
                     dap_cli_server_cmd_set_reply_text(a_str_reply, "Not found cluster with ID %s", l_guuid_str);
                     break;