diff --git a/src/datetime.rs b/src/datetime.rs
index 9239593..b77621a 100644
--- a/src/datetime.rs
+++ b/src/datetime.rs
@@ -99,7 +99,7 @@ impl fmt::Display for Time {
         write!(f, "{:02}:{:02}:{:02}", self.hour, self.minute, self.second)?;
         if self.nanosecond != 0 {
             let s = format!("{:09}", self.nanosecond);
-            write!(f, ".{}", s.trim_right_matches('0'))?;
+            write!(f, ".{}", s.trim_end_matches('0'))?;
         }
         Ok(())
     }
diff --git a/src/de.rs b/src/de.rs
index 92db5d0..6b7c43b 100644
--- a/src/de.rs
+++ b/src/de.rs
@@ -1321,7 +1321,7 @@ impl<'a> Deserializer<'a> {
         if suffix != "" {
             return Err(self.error(start, ErrorKind::NumberInvalid));
         }
-        i64::from_str_radix(&prefix.replace("_", "").trim_left_matches('+'), radix)
+        i64::from_str_radix(&prefix.replace("_", "").trim_start_matches('+'), radix)
             .map_err(|_e| self.error(start, ErrorKind::NumberInvalid))
     }
 
@@ -1399,7 +1399,7 @@ impl<'a> Deserializer<'a> {
         }
 
         let mut number = integral
-            .trim_left_matches('+')
+            .trim_start_matches('+')
             .chars()
             .filter(|c| *c != '_')
             .collect::<String>();
diff --git a/test-suite/tests/valid.rs b/test-suite/tests/valid.rs
index 7c1691c..68e0ea2 100644
--- a/test-suite/tests/valid.rs
+++ b/test-suite/tests/valid.rs
@@ -19,7 +19,7 @@ fn to_json(toml: toml::Value) -> Json {
         Toml::Integer(i) => doit("integer", Json::String(i.to_string())),
         Toml::Float(f) => doit("float", Json::String({
             let s = format!("{:.15}", f);
-            let s = format!("{}", s.trim_right_matches('0'));
+            let s = format!("{}", s.trim_end_matches('0'));
             if s.ends_with('.') {format!("{}0", s)} else {s}
         })),
         Toml::Boolean(b) => doit("bool", Json::String(format!("{}", b))),