diff --git a/.rustfmt.toml b/.rustfmt.toml
new file mode 100644
index 0000000..c0778a0
--- /dev/null
+++ b/.rustfmt.toml
@@ -0,0 +1,2 @@
+# Rust formatting configuration
+edition = "2021"
\ No newline at end of file
diff --git a/src/lib.rs b/src/lib.rs
index 6097622..16ee1cb 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,5 +1,5 @@
 //! crabrl - High-performance XBRL parser and validator
-//! 
+//!
 //! Licensed under AGPL-3.0
 
 pub mod model;
@@ -26,7 +26,7 @@ impl Validator {
             strict: false,
         }
     }
-    
+
     pub fn with_config(config: ValidationConfig) -> Self {
         let mut inner = validator::XbrlValidator::new();
         if config.strict {
@@ -37,14 +37,14 @@ impl Validator {
             strict: config.strict,
         }
     }
-    
+
     pub fn sec_edgar() -> Self {
         Self {
             inner: validator::XbrlValidator::new().strict(),
             strict: true,
         }
     }
-    
+
     pub fn validate(&self, doc: &Document) -> Result<ValidationResult> {
         let start = std::time::Instant::now();