diff --git a/src/extract.rs b/src/extract.rs
index 07fe944..a5be89e 100644
--- a/src/extract.rs
+++ b/src/extract.rs
@@ -9,7 +9,7 @@ use std::path::Path;
 use std::{collections::HashSet, convert::TryFrom};
 use url::Url;
 
-#[derive(Clone, Debug)]
+#[derive(Clone, Debug, PartialEq, Eq)]
 pub enum FileType {
     Html,
     Markdown,
@@ -28,7 +28,7 @@ impl<P: AsRef<Path>> From<P> for FileType {
         let path = p.as_ref();
         match path.extension() {
             Some(ext) => match ext {
-                _ if ext == "md" => FileType::Markdown,
+                _ if (ext == "md" || ext == "markdown") => FileType::Markdown,
                 _ if (ext == "htm" || ext == "html") => FileType::Html,
                 _ => FileType::Plaintext,
             },
@@ -202,6 +202,25 @@ mod test {
         content
     }
 
+    #[test]
+    fn test_file_type() {
+        assert_eq!(FileType::from(Path::new("test.md")), FileType::Markdown);
+        assert_eq!(
+            FileType::from(Path::new("test.markdown")),
+            FileType::Markdown
+        );
+        assert_eq!(FileType::from(Path::new("test.html")), FileType::Html);
+        assert_eq!(FileType::from(Path::new("test.txt")), FileType::Plaintext);
+        assert_eq!(
+            FileType::from(Path::new("test.something")),
+            FileType::Plaintext
+        );
+        assert_eq!(
+            FileType::from(Path::new("/absolute/path/to/test.something")),
+            FileType::Plaintext
+        );
+    }
+
     #[test]
     fn test_extract_markdown_links() {
         let input = "This is [a test](https://endler.dev). This is a relative link test [Relative Link Test](relative_link)";