diff --git a/parser/src/parsing/common.rs b/parser/src/parsing/common.rs
index 3c9a585..9d9aef6 100644
--- a/parser/src/parsing/common.rs
+++ b/parser/src/parsing/common.rs
@@ -17,7 +17,10 @@ pub fn parse_identifier(input: &str) -> IResult<&str, &str> {
     let (_, first) = peek(anychar)(input)?;
     if first.is_alphabetic() || first == '_' {
         take_while(|c: char| {
-            is_alphanumeric(c as u8) || c == '_'
+            match c {
+                'a'..='z' | 'A'..='Z' | '_' | '0'..='9' => true,
+                _ => false
+            }
         })(input)
     } else {
         Err(nom::Err::Error(make_error(
diff --git a/server/src/config.rs b/server/src/config.rs
index 2f15935..efdb3c4 100644
--- a/server/src/config.rs
+++ b/server/src/config.rs
@@ -18,6 +18,8 @@ pub struct Configuration {
     port: u16,
     #[arg(short, long, help = "Path to the data file")]
     file: PathBuf,
+    #[arg(short, long, help = "Delay between rows in milliseconds")]
+    throttle: Option<u64>,
 }
 
 impl Configuration {
@@ -30,4 +32,9 @@ impl Configuration {
     pub fn get_file_path(&self) -> &PathBuf {
         &self.file
     }
+
+    #[inline]
+    pub fn get_throttle(&self) -> Option<u64> {
+        self.throttle
+    }
 }
diff --git a/server/src/main.rs b/server/src/main.rs
index e54677e..74d35e4 100644
--- a/server/src/main.rs
+++ b/server/src/main.rs
@@ -223,6 +223,10 @@ where
                                 token.reset();
                                 break;
                             }
+                            if let Some(throttle) = config.get_throttle() {
+                                writer.flush().await?;
+                                tokio::time::sleep(tokio::time::Duration::from_millis(throttle)).await;
+                            }
                         }
 
                         writer