diff --git a/client/src/cmdhflegic.c b/client/src/cmdhflegic.c
index b202ba170..bd63057ce 100644
--- a/client/src/cmdhflegic.c
+++ b/client/src/cmdhflegic.c
@@ -28,21 +28,6 @@ static int CmdHelp(const char *Cmd);
 
 #define MAX_LENGTH 1024
 
-static int usage_legic_rdbl(void) {
-    PrintAndLogEx(NORMAL, "Read data from a LEGIC Prime tag\n");
-    PrintAndLogEx(NORMAL, "Usage:  hf legic rdbl [h] [o <offset>] [l <length>] [iv <IV>]\n");
-    PrintAndLogEx(NORMAL, "Options:");
-    PrintAndLogEx(NORMAL, "      h             : this help");
-    PrintAndLogEx(NORMAL, "      o <offset>    : (hex) offset in data array to start download from");
-    PrintAndLogEx(NORMAL, "      l <length>    : (hex) number of bytes to read");
-    PrintAndLogEx(NORMAL, "      i <IV>        : (hex) (optional) Initialization vector to use. Must be odd and 7bits max");
-    PrintAndLogEx(NORMAL, "");
-    PrintAndLogEx(NORMAL, "Examples:");
-    PrintAndLogEx(NORMAL, _YELLOW_("      hf legic rdbl o 0 l 16        - reads from byte[0] 0x16 bytes(system header)"));
-    PrintAndLogEx(NORMAL, _YELLOW_("      hf legic rdbl o 0 l 4 iv 55      - reads from byte[0] 0x4 bytes with IV 0x55"));
-    PrintAndLogEx(NORMAL, _YELLOW_("      hf legic rdbl o 0 l 100 iv 55    - reads 0x100 bytes with IV 0x55"));
-    return PM3_SUCCESS;
-}
 static int usage_legic_sim(void) {
     PrintAndLogEx(NORMAL, "Simulates a LEGIC Prime tag. MIM22, MIM256, MIM1024 types can be emulated");
     PrintAndLogEx(NORMAL, "Use " _YELLOW_("`hf legic eload`") " to upload a dump into emulator memory\n");
@@ -512,34 +497,32 @@ out:
 // offset in data memory
 // number of bytes to read
 static int CmdLegicRdbl(const char *Cmd) {
+    CLIParserContext *ctx;
+    CLIParserInit(&ctx, "hf legic rdbl",
+                  "Read data from a LEGIC Prime tag",
+                  "hf legic rdbl -o 0 -l 16  <- reads from byte[0] 16 bytes(system header)\n"
+                  "hf legic rdbl -o 0 -l 4 --iv 55  <- reads from byte[0] 4 bytes with IV 0x55\n"
+                  "hf legic rdbl -o 0 -l 256 --iv 55  <- reads from byte[0] 256 bytes with IV 0x55");
 
-    uint32_t offset = 0, len = 0, iv = 1;
-    bool errors = false;
-    uint8_t cmdp = 0;
-    while (param_getchar(Cmd, cmdp) != 0x00 && !errors) {
-        switch (tolower(param_getchar(Cmd, cmdp))) {
-            case 'h' :
-                return usage_legic_rdbl();
-            case 'o' :
-                offset = param_get32ex(Cmd, cmdp + 1, 0, 16);
-                cmdp += 2;
-                break;
-            case 'l' :
-                len = param_get32ex(Cmd, cmdp + 1, 0, 16);
-                cmdp += 2;
-                break;
-            case 'i' :
-                iv = param_get32ex(Cmd, cmdp + 1, 1, 16);
-                cmdp += 2;
-                break;
-            default :
-                PrintAndLogEx(WARNING, "Unknown parameter '%c'", param_getchar(Cmd, cmdp));
-                errors = true;
-                break;
-        }
-    }
-    //Validations
-    if (errors || strlen(Cmd) == 0) return usage_legic_rdbl();
+    void *argtable[] = {
+        arg_param_begin,
+        arg_int1("o", "offset", "<dec>", "offset in data array to start download from"),
+        arg_int1("l", "length", "<dec>", "number of bytes to read"),
+        arg_str0(NULL, "iv", "<hex>", "Initialization vector to use. Must be odd and 7bits max"),
+        arg_param_end
+    };
+    CLIExecWithReturn(ctx, Cmd, argtable, false);
+
+    int offset = arg_get_int_def(ctx, 1, 0);
+
+    int len = arg_get_int_def(ctx, 2, 0);
+
+    int iv_len = 0;
+    uint8_t iv[1] = {0x01};  // formerly uidcrc
+
+    CLIGetHexWithReturn(ctx, 3, iv, &iv_len);
+
+    CLIParserFree(ctx);
 
     // sanity checks
     if (len + offset >= MAX_LENGTH) {
@@ -557,9 +540,9 @@ static int CmdLegicRdbl(const char *Cmd) {
     }
 
     uint16_t datalen = 0;
-    int status = legic_read_mem(offset, len, iv, data, &datalen);
+    int status = legic_read_mem(offset, len, iv[0], data, &datalen);
     if (status == PM3_SUCCESS) {
-        PrintAndLogEx(NORMAL, "\n ##  |  0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F");
+        PrintAndLogEx(NORMAL, " ##  |  0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F");
         PrintAndLogEx(NORMAL, "-----+------------------------------------------------------------------------------------------------");
         print_hex_break(data, datalen, 32);
     }
diff --git a/doc/cliparser_todo.txt b/doc/cliparser_todo.txt
index 6e06c5278..c8a21d606 100644
--- a/doc/cliparser_todo.txt
+++ b/doc/cliparser_todo.txt
@@ -82,7 +82,6 @@ hf legic reader
 hf legic info
 hf legic dump
 hf legic restore
-hf legic rdbl
 hf legic sim
 hf legic wrbl
 hf legic eload