diff --git a/SDBlockDevice.cpp b/SDBlockDevice.cpp
index a86cb8f..8de7d9b 100644
--- a/SDBlockDevice.cpp
+++ b/SDBlockDevice.cpp
@@ -151,8 +151,16 @@
 #warning "mbed-os version 5.6.1 or above required"
 #endif
 
-#define SD_COMMAND_TIMEOUT                       5000   /*!< Timeout in ms for response */
-#define SD_CMD0_GO_IDLE_STATE_RETRIES            5      /*!< Number of retries for sending CMDO */
+#ifndef MBED_CONF_SD_CMD_TIMEOUT
+#define MBED_CONF_SD_CMD_TIMEOUT                 5000   /*!< Timeout in ms for response */
+#endif
+
+#ifndef MBED_CONF_SD_CMD0_IDLE_STATE_RETRIES
+#define MBED_CONF_SD_CMD0_IDLE_STATE_RETRIES     5      /*!< Number of retries for sending CMDO */
+#endif
+
+#define SD_COMMAND_TIMEOUT                       MBED_CONF_SD_CMD_TIMEOUT
+#define SD_CMD0_GO_IDLE_STATE_RETRIES            MBED_CONF_SD_CMD0_IDLE_STATE_RETRIES
 #define SD_DBG                                   0      /*!< 1 - Enable debugging */
 #define SD_CMD_TRACE                             0      /*!< 1 - Enable SD command tracing */
 
diff --git a/config/mbed_lib.json b/config/mbed_lib.json
index d146d55..e4bddc9 100644
--- a/config/mbed_lib.json
+++ b/config/mbed_lib.json
@@ -6,7 +6,9 @@
         "SPI_MISO": "D12",
         "SPI_CLK": "D13",
         "DEVICE_SPI": 1,
-        "FSFAT_SDCARD_INSTALLED": 1
+        "FSFAT_SDCARD_INSTALLED": 1,
+        "CMD_TIMEOUT": 5000,
+        "CMD0_IDLE_STATE_RETRIES" : 5
     },
     "target_overrides": {
         "DISCO_F051R8": {