diff --git a/project/Core/Src/tftp.c b/project/Core/Src/tftp.c
index 790c733..c3b8aa4 100644
--- a/project/Core/Src/tftp.c
+++ b/project/Core/Src/tftp.c
@@ -24,7 +24,11 @@ static tftp_custom_file_t virt_file[] = {{.name = "index.txt", .data = NULL, .le
                                          {.name = "virtImage.bmp", .data = NULL, .len = 0, .offset = 0},
                                          {.name = "virtImage.gif", .data = NULL, .len = 0, .offset = 0},
                                          {.name = "virtText.txt", .data = NULL, .len = 0, .offset = 0}};
-
+static void* tftp_open(const char* fname, const char* mode, uint8_t write);
+static void tftp_close(void* handle);
+static int tftp_read(void* handle, void* buf, int bytes);
+static int tftp_write(void* handle, struct pbuf* p);
+static struct tftp_context tftpContext_s = {.open = tftp_open, .close = tftp_close, .read = tftp_read, .write = tftp_write};
 /**
  * @brief tftp custom file functions to set the offset and read the data
  * @param[in,out] handle Custom file handles
@@ -109,7 +113,7 @@ size_t tftp_custom_fwrite(const void* buf, size_t bytes, tftp_custom_file_t* han
  * @param write Flag indicating read (0) or write (!= 0) access
  * @return void* File handle supplied to other functions
  */
-void* tftp_open(const char* fname, const char* mode, uint8_t write) {
+static void* tftp_open(const char* fname, const char* mode, uint8_t write) {
     LOG_INFO(TAG, "Opening %s", fname);
 
     UNUSED(mode);
@@ -133,7 +137,7 @@ void* tftp_open(const char* fname, const char* mode, uint8_t write) {
  *
  * @param handle The handle to the file to close
  */
-void tftp_close(void* handle) {
+static void tftp_close(void* handle) {
     LOG_INFO(TAG, "closing file");
     if (handle == NULL) {
         LOG_CRIT(TAG, "handle is null");
@@ -177,7 +181,7 @@ void tftp_close(void* handle) {
  * @param bytes Number of bytes to copy to buf
  * @return int >= 0: Success; < 0: Error
  */
-int tftp_read(void* handle, void* buf, int bytes) {
+static int tftp_read(void* handle, void* buf, int bytes) {
     int ret = 0;
     LOG_INFO(TAG, "reading file");
     if (handle == NULL) {
@@ -215,7 +219,7 @@ int tftp_read(void* handle, void* buf, int bytes) {
  * In other words, TFTP headers are stripped off.
  * @return int >= 0: Success; < 0: Error
  */
-int tftp_write(void* handle, struct pbuf* p) {
+static int tftp_write(void* handle, struct pbuf* p) {
     LOG_INFO(TAG, "Writing file");
     tftp_custom_file_t* file = (tftp_custom_file_t*)handle;
     if (file == &virt_file[VIRT_IMAGE_BMP] || file == &virt_file[VIRT_IMAGE_GIF] || file == &virt_file[VIRT_TEXT_TXT]) {
@@ -264,8 +268,6 @@ void init_index(void) {
     LOG_INFO(TAG, "index.txt created");
 }
 
-struct tftp_context tftpContext_s = {.open = tftp_open, .close = tftp_close, .read = tftp_read, .write = tftp_write};
-
 /**
  * @brief Initialize tftp server
  */