diff --git a/src/git.rs b/src/git.rs
index 136e3e5..e54e26e 100644
--- a/src/git.rs
+++ b/src/git.rs
@@ -63,6 +63,17 @@ fn extract_commit_messages(input: &str) -> Vec<String> {
 }
 
 /// Parse a commit message and return the subject, body, and footers.
+///
+/// Please refer the official documentation for the commit message format.
+/// See: https://www.conventionalcommits.org/en/v1.0.0/#summary
+///
+/// ```
+/// <type>[optional scope]: <description> <-- Subject
+///
+/// [optional body] <-- Body
+///
+/// [optional footer(s)] <-- Footer
+/// ```
 pub fn parse_commit_message(
     message: &str,
 ) -> (String, Option<String>, Option<HashMap<String, String>>) {
@@ -107,7 +118,7 @@ pub fn parse_commit_message(
 /// Note that exclamation mark is not respected as the existing commitlint
 /// does not have any rules for it.
 /// See: https://commitlint.js.org/#/reference-rules
-pub fn parse_subject(subject: &str) -> Option<(String, Option<String>, String)> {
+pub fn parse_subject(subject: &str) -> (String, Option<String>, String) {
     let re =
         regex::Regex::new(r"^(?P<type>\w+)(?:\((?P<scope>[^\)]+)\))?(!)?\:\s(?P<description>.+)$")
             .unwrap();
@@ -116,9 +127,10 @@ pub fn parse_subject(subject: &str) -> Option<(String, Option<String>, String)>
         let scope = captures.name("scope").map(|m| m.as_str().to_string());
         let description = captures.name("description").unwrap().as_str().to_string();
 
-        return Some((r#type, scope, description));
+        return (r#type, scope, description);
     }
-    None
+    // Fall back to the description.
+    ("".to_string(), None, subject.to_string())
 }
 
 #[cfg(test)]
@@ -179,10 +191,7 @@ Name: Keke";
             footer.clone().unwrap().get("Link"),
             Some(&"Hello".to_string())
         );
-        assert_eq!(
-            footer.unwrap().get("Name"),
-            Some(&"Keke".to_string())
-        );
+        assert_eq!(footer.unwrap().get("Name"), Some(&"Keke".to_string()));
     }
 
     #[test]
@@ -190,11 +199,11 @@ Name: Keke";
         let input = "feat(cli): add dummy option";
         assert_eq!(
             parse_subject(input),
-            Some((
+            (
                 "feat".to_string(),
                 Some("cli".to_string()),
                 "add dummy option".to_string()
-            ))
+            )
         );
     }
 
@@ -203,11 +212,11 @@ Name: Keke";
         let input = "feat(cli)!: add dummy option";
         assert_eq!(
             parse_subject(input),
-            Some((
+            (
                 "feat".to_string(),
                 Some("cli".to_string()),
                 "add dummy option".to_string()
-            ))
+            )
         );
     }
 
@@ -216,7 +225,7 @@ Name: Keke";
         let input = "feat: add dummy option";
         assert_eq!(
             parse_subject(input),
-            Some(("feat".to_string(), None, "add dummy option".to_string()))
+            ("feat".to_string(), None, "add dummy option".to_string())
         );
     }
 
@@ -225,23 +234,20 @@ Name: Keke";
         let input = "feat!: add dummy option";
         assert_eq!(
             parse_subject(input),
-            Some(("feat".to_string(), None, "add dummy option".to_string()))
+            ("feat".to_string(), None, "add dummy option".to_string())
         );
     }
     #[test]
     fn test_parse_subject_without_message() {
         let input = "";
-        assert_eq!(
-            parse_subject(input),
-            None
-        );
+        assert_eq!(parse_subject(input), ("".to_string(), None, "".to_string()));
     }
-      #[test]
+    #[test]
     fn test_parse_subject_with_error_message() {
         let input = "test";
         assert_eq!(
             parse_subject(input),
-            None
+            ("".to_string(), None, "test".to_string())
         );
     }
 }
diff --git a/src/message.rs b/src/message.rs
index f8cb621..527ec91 100644
--- a/src/message.rs
+++ b/src/message.rs
@@ -45,25 +45,15 @@ impl Message {
     /// Create a new Message.
     pub fn new(raw: String) -> Self {
         let (subject, body, footers) = parse_commit_message(&raw);
-        match parse_subject(&subject) {
-            Some((r#type, scope, description)) => Self {
-                body,
-                description: Some(description),
-                footers,
-                raw,
-                r#type: Some(r#type),
-                scope,
-                subject: Some(subject),
-            },
-            None => Self {
-                raw,
-                description: None,
-                r#type: None,
-                scope: None,
-                body,
-                footers,
-                subject: Some(subject),
-            },
+        let (r#type, scope, description) = parse_subject(&subject);
+        Self {
+            body,
+            description: Some(description),
+            footers,
+            raw,
+            r#type: Some(r#type),
+            scope,
+            subject: Some(subject),
         }
     }
 }
diff --git a/src/rule/type_empty.rs b/src/rule/type_empty.rs
index fd3e84d..2030467 100644
--- a/src/rule/type_empty.rs
+++ b/src/rule/type_empty.rs
@@ -23,7 +23,7 @@ impl Rule for TypeEmpty {
     }
 
     fn validate(&self, message: &Message) -> Option<Violation> {
-        if message.r#type.is_none() {
+        if message.r#type.is_none() || message.r#type.as_ref().unwrap().is_empty() {
             return Some(Violation {
                 level: self.level.unwrap_or(Self::LEVEL),
                 message: self.message(message),
@@ -79,9 +79,6 @@ mod tests {
         let violation = rule.validate(&message);
         assert!(violation.is_some());
         assert_eq!(violation.clone().unwrap().level, Level::Error);
-        assert_eq!(
-            violation.unwrap().message,
-            "type is empty".to_string()
-        );
+        assert_eq!(violation.unwrap().message, "type is empty".to_string());
     }
 }