diff --git a/R/scan-deps.R b/R/scan-deps.R
index e841869d..5e814222 100644
--- a/R/scan-deps.R
+++ b/R/scan-deps.R
@@ -109,6 +109,8 @@ scan_deps_pattern <- function() {
     "[.]r$",
     "[.]Rmd$",
     "[.]rmd$",
+    "[.]rmarkdown",
+    "[.]Rmarkdown",
     "[.]qmd$",
     "^_bookdown[.]yml$",
     "^_quarto[.]yml$",
@@ -261,6 +263,7 @@ scan_path_deps_do <- function(code, path) {
     ext,
     ".r" = scan_path_deps_do_r(code, path),
     ".qmd" = ,
+    ".rmarkdown" = ,
     ".rmd" = scan_path_deps_do_rmd(code, path),
     "DESCRIPTION" = scan_path_deps_do_dsc(code, path),
     "NAMESPACE" = scan_path_deps_do_namespace(code, path),
diff --git a/tests/testthat/_snaps/unix/scan-deps.md b/tests/testthat/_snaps/unix/scan-deps.md
index 1b718566..b8be090f 100644
--- a/tests/testthat/_snaps/unix/scan-deps.md
+++ b/tests/testthat/_snaps/unix/scan-deps.md
@@ -3,15 +3,17 @@
     Code
       scan_deps(project)[]
     Output
-      # A data frame: 6 x 9
-        path      ref     package version type  code              start_row start_column start_byte
-        <chr>     <chr>   <chr>   <chr>   <chr> <chr>                 <int>        <int>      <int>
-      1 R/code.R  CD      CD      *       prod  CD::pkg                   4            1         26
-      2 R/code.R  AB      AB      *       prod  library(AB)               1            1          1
-      3 R/code.R  BC      BC      *       prod  require(BC)               2            1         13
-      4 doc.qmd   pkgload pkgload *       prod  pkgload::load_all        12            1        174
-      5 index.Rmd ST      ST      *       prod  ST::fun                  10            1         97
-      6 index.Rmd RS      RS      *       prod  library(RS)               9            1         85
+      # A data frame: 8 x 9
+        path            ref     package version type  code              start_row start_column start_byte
+        <chr>           <chr>   <chr>   <chr>   <chr> <chr>                 <int>        <int>      <int>
+      1 R/code.R        CD      CD      *       prod  CD::pkg                   4            1         26
+      2 R/code.R        AB      AB      *       prod  library(AB)               1            1          1
+      3 R/code.R        BC      BC      *       prod  require(BC)               2            1         13
+      4 doc.qmd         pkgload pkgload *       prod  pkgload::load_all        12            1        174
+      5 index.Rmarkdown ST      ST      *       prod  ST::fun                  10            1         97
+      6 index.Rmarkdown RS      RS      *       prod  library(RS)               9            1         85
+      7 index.Rmd       ST      ST      *       prod  ST::fun                  10            1         97
+      8 index.Rmd       RS      RS      *       prod  library(RS)               9            1         85
 
 ---
 
@@ -23,8 +25,8 @@
       + AB      @ R/code.R
       + BC      @ R/code.R
       + CD      @ R/code.R
-      + RS      @ index.Rmd
-      + ST      @ index.Rmd
+      + RS      @ index.Rmarkdown, index.Rmd
+      + ST      @ index.Rmarkdown, index.Rmd
       + pkgload @ doc.qmd
 
 # scan_path_deps
diff --git a/tests/testthat/fixtures/scan/project-1/index.Rmarkdown b/tests/testthat/fixtures/scan/project-1/index.Rmarkdown
new file mode 100644
index 00000000..87205409
--- /dev/null
+++ b/tests/testthat/fixtures/scan/project-1/index.Rmarkdown
@@ -0,0 +1,11 @@
+---
+title: pkgdepends
+output:
+  github_document:
+always_allow_html: yes
+---
+
+```{r}
+library(RS)
+ST::fun()
+```