diff --git a/README.md b/README.md
index 3ce6e70..aa58325 100644
--- a/README.md
+++ b/README.md
@@ -46,7 +46,7 @@ snac2nex -s /path/to/snac/storage -t /path/to/nex -u user1 -u user2
 
           * escaped with `%%`
 
-          [default: %H:%M:%S.txt]
+          [default: %H:%M:%S]
 
       --format-updated <FORMAT_UPDATED>
           Post `{updated}` time format
diff --git a/src/config.rs b/src/config.rs
index e8b71a0..019b579 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -30,7 +30,7 @@ pub struct Config {
     /// Post filenames format
     ///
     /// * escaped with `%%`
-    #[arg(long, default_value_t = String::from("%H:%M:%S.txt"))]
+    #[arg(long, default_value_t = String::from("%H:%M:%S"))]
     pub format_filename: String,
 
     /// Post `{updated}` time format
diff --git a/src/nex.rs b/src/nex.rs
index f1478c0..59d7204 100644
--- a/src/nex.rs
+++ b/src/nex.rs
@@ -128,7 +128,11 @@ impl Nex {
             );
 
         // write the data
-        p.push(published.format(&self.filename).to_string());
+        p.push(
+            published
+                .format(&self.filename.trim_matches(std::path::MAIN_SEPARATOR))
+                .to_string(),
+        );
         fs::write(p, c)?; // @TODO skip overwrite operations
 
         Ok(())