diff --git a/src/main.rs b/src/main.rs
index ffa1f31..7c87c49 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -501,7 +501,7 @@ impl TryFrom<&str> for SubDuration {
 
     fn try_from(value: &str) -> Result<Self, Self::Error> {
         lazy_static! {
-            static ref TIME_RE: Regex = Regex::new(r"^(?P<n>-)?(?:(?:(?P<h>\d+):)?(?P<m>\d+):)?(?P<s>\d+(?:[.,]\d+)?)$").unwrap();
+            static ref TIME_RE: Regex = Regex::new(r"^(?U)(?P<n>-)?(?:(?P<h>\d+):)?(?:(?P<m>\d+):)?(?P<s>\d+(?:[.,]\d+)?)$").unwrap();
         }
 
         match TIME_RE.captures(value) {