diff --git a/server.c b/server.c
index 97dd1fb..41350d1 100644
--- a/server.c
+++ b/server.c
@@ -292,11 +292,11 @@ void execute_cgi(int client, const char *path, const char *method, const char *q
 off_t get_file_size(const char *filepath) {
     struct stat statbuf;
     if (stat(filepath, &statbuf) == 0) {
-        printf("file size: %u\n", statbuf.st_size);
+        printf("file size: %lu\n", statbuf.st_size);
         if(statbuf.st_size == 0) {
             FILE* fp = fopen(filepath, "ab+");
             off_t sz = ftell(fp);
-            printf("ftell size: %u\n", sz);
+            printf("ftell size: %lu\n", sz);
             return sz;
         }
         return statbuf.st_size;