diff --git a/R/helpers.R b/R/helpers.R
index 06f4c1b..7e0390c 100644
--- a/R/helpers.R
+++ b/R/helpers.R
@@ -39,3 +39,16 @@ set_rownames = function(vec) {
 
   return(vec)
 }
+
+# check for empty URLs in a file
+check_empty_urls <- function(file_path) {
+  content <- readLines(file_path)
+  # Regex to match empty URLs like [text]()
+  empty_url_pattern <- "\\[.*?\\]\\(\\s*\\)"
+
+  # Look for any lines that match the pattern
+  empty_urls <- grep(empty_url_pattern, content, value = TRUE)
+
+  # Return all found empty URLs
+  return(empty_urls)
+}
diff --git a/README.Rmd b/README.Rmd
index 13d3be0..3e4e2f0 100644
--- a/README.Rmd
+++ b/README.Rmd
@@ -23,7 +23,7 @@ Friendly & Fast Input-Output Analysis <img src="man/figures/leontief.jpg" align=
 [![R-universe](https://albersonmiranda.r-universe.dev/badges/fio)](https://albersonmiranda.r-universe.dev/fio)
 [![R-CMD-check](https://github.com/albersonmiranda/fio/actions/workflows/R-CMD-check.yaml/badge.svg)](https://github.com/albersonmiranda/fio/actions/workflows/R-CMD-check.yaml)
 [![Codecov test coverage](https://codecov.io/gh/albersonmiranda/fio/branch/main/graph/badge.svg)](https://app.codecov.io/gh/albersonmiranda/fio?branch=main)
-[![Downloads](https://cranlogs.r-pkg.org/badges/grand-total/fio)]()
+[![Downloads](https://cranlogs.r-pkg.org/badges/grand-total/fio)](https://CRAN.R-project.org/package=fio)
 <!-- badges: end -->
 
 `{fio}` (*Friendly Input-Output*) is a R package designed for input-output analysis, emphasizing usability for Excel users and performance. It includes an [RStudio Addin](https://rstudio.github.io/rstudioaddins/) and a suite of functions for straightforward import of input-output tables from Excel, either programmatically or directly from the clipboard.
diff --git a/README.md b/README.md
index 153860b..12bdd65 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@ status](https://www.r-pkg.org/badges/version/fio)](https://CRAN.R-project.org/pa
 [![R-CMD-check](https://github.com/albersonmiranda/fio/actions/workflows/R-CMD-check.yaml/badge.svg)](https://github.com/albersonmiranda/fio/actions/workflows/R-CMD-check.yaml)
 [![Codecov test
 coverage](https://codecov.io/gh/albersonmiranda/fio/branch/main/graph/badge.svg)](https://app.codecov.io/gh/albersonmiranda/fio?branch=main)
-[![Downloads](https://cranlogs.r-pkg.org/badges/grand-total/fio)]()
+[![Downloads](https://cranlogs.r-pkg.org/badges/grand-total/fio)](https://CRAN.R-project.org/package=fio)
 <!-- badges: end -->
 
 `{fio}` (*Friendly Input-Output*) is a R package designed for
diff --git a/cran-comments.md b/cran-comments.md
index 71cb4c8..56b3186 100644
--- a/cran-comments.md
+++ b/cran-comments.md
@@ -13,6 +13,15 @@
   - Fedora 37, 38, 39, 40; R and all dependencies installed from default repository (`dnf install`).
 * All tests passed successfully, except macOS 13 (R-devel). Transitive dependency `fs` could not be installed due to a compilation error. The error is not related to `fio`. The error is being tracked in the following issue: [Compilation fail macOS 13 (R 4.5)](https://github.com/r-lib/fs/issues/467)
 
+## Resubmission
+
+This is a resubmission. In this version I have:
+
+* Fixed empty URL in README.md.
+* Added unit test for empty URLs in .Rd, .Rmd and .md files.
+
+## CRAN requests
+
 In this version I have addressed CRAN requests (e-mail received in 2024-08-23):
 
 * Update messages in `msrv.R`:
@@ -23,4 +32,4 @@ In this version I have addressed CRAN requests (e-mail received in 2024-08-23):
   - Evidence: Evidence of the fix can be found in the following CI run:
     - [GitHub Actions - Rust-check](https://github.com/albersonmiranda/fio/actions/runs/10536150893)
     - Job `no-install` for evidence that build fails when `cargo` and `rustc` are not found and install instructions are displayed along with the minimum version required.
-    - Job `msrv-lower` for evidence that build fails when `cargo` and `rustc` are found but the minimum version required is not met and an error message is displayed containing both installed and required Rust versions.
\ No newline at end of file
+    - Job `msrv-lower` for evidence that build fails when `cargo` and `rustc` are found but the minimum version required is not met and an error message is displayed containing both installed and required Rust versions.
diff --git a/tests/testthat/test-empty-urls.R b/tests/testthat/test-empty-urls.R
new file mode 100644
index 0000000..1dc2af3
--- /dev/null
+++ b/tests/testthat/test-empty-urls.R
@@ -0,0 +1,16 @@
+# CRAN requires that URLs in the documentation are valid and not empty, including badges
+test_that("No empty URLs in markdown files", {
+  # Specify the path to the package directory
+  package_path <- file.path(c(".", "man"))  # Adjust this if your tests directory is nested
+
+  # Find all documentation files in the package directory
+  files <- list.files(package_path, pattern = "\\.Rmd$|\\.md$|\\.Rd$", recursive = TRUE, full.names = TRUE)
+
+  # Check each markdown file for empty URLs
+  for (file in files) {
+    empty_urls <- check_empty_urls(file)
+
+    # Expect no empty URLs in the file
+    expect_length(empty_urls, 0)
+  }
+})