diff --git a/Cargo.toml b/Cargo.toml
index c27784a..977ecf1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "duration-str"
-version = "0.3.2"
+version = "0.3.3"
 authors = ["baoyachi <liaoymxsdl@gmail.com>"]
 edition = "2018"
 description = "duration string parser"
diff --git a/README.md b/README.md
index 8c824dc..15df692 100644
--- a/README.md
+++ b/README.md
@@ -11,16 +11,17 @@ The default duration unit is second.Also use below **duration unit**
 ## Duration Unit List
 
 Parse string to `Duration` . The String duration unit support for one of:`["y","mon","w","d","h","m","s", "ms", "µs", "ns"]`
-- y:Year. Support string value: `["y" | "year" | "Y" | "YEAR" | "Year"]`. e.g. 1y
-- mon:Month.Support string value:`["mon" | "MON" | "Month" | "month" | "MONTH"]`. e.g. 1mon
-- w:Week.Support string value: `["w" | "W" | "Week" | "WEEK" | "week"]`. e.g. 1w
-- d:Day.Support string value: `["d" | "D" | "Day" | "DAY" | "day"]`. e.g. 1d
-- h:Hour.Support string value: `["h" | "H" | "Hour" | "HOUR" | "hour"]`. e.g. 1h
-- m:Minute.Support string value: `["m" | "M" | "Minute" | "MINUTE" | "minute"]`. e.g. 1m
-- s:Second.Support string value: `["s" | "S" | "Second" | "SECOND" | "second"]`. e.g. 1s
-- ms:Millisecond.Support string value: `["ms" | "MS" | "Millisecond" | "MilliSecond" | "MILLISECOND" | "millisecond", "mSEC"]`. e.g. 1ms
-- µs:Microsecond.Support string value: `["µs" | "µS" | "µsecond" | "Microsecond" | "MicroSecond" | "MICROSECOND" | "microsecond", "µSEC"]`. e.g. 1µs
-- ns:Nanosecond.Support string value: `["ns" | "NS" | "Nanosecond" | "NanoSecond" | "NANOSECOND" | "nanosecond", "nSEC"]`. e.g. 1ns
+
+* y:Year. Support string value: ["y" | "year" | "Y" | "YEAR" | "Year"]. e.g. 1y
+* mon:Month.Support string value: ["mon" | "MON" | "Month" | "month" | "MONTH"]. e.g. 1mon
+* w:Week.Support string value: ["w" | "W" | "Week" | "WEEK" | "week"]. e.g. 1w
+* d:Day.Support string value: ["d" | "D" | "Day" | "DAY" | "day"]. e.g. 1d
+* h:Hour.Support string value: ["h" | "H" | "Hour" | "HOUR" | "hour"]. e.g. 1h
+* m:Minute.Support string value: ["m" | "M" | "Minute" | "MINUTE" | "minute" | "min" | "MIN"]. e.g. 1m
+* s:Second.Support string value: ["s" | "S" | "Second" | "SECOND" | "second" | "sec" | "SEC"]. e.g. 1s
+* ms:Millisecond.Support string value: ["ms" | "MS" | "Millisecond" | "MilliSecond" | "MILLISECOND" | "millisecond" | "mSEC" ]. e.g. 1ms
+* µs:Microsecond.Support string value: ["µs" | "µS" | "µsecond" | "Microsecond" | "MicroSecond" | "MICROSECOND" | "microsecond" | "µSEC"]. e.g. 1µs
+* ns:Nanosecond.Support string value: ["ns" | "NS" | "Nanosecond" | "NanoSecond" | "NANOSECOND" | "nanosecond" | "nSEC"]. e.g. 1ns
 
 Also,`duration_str` support time duration simple evaluation(+,*). See example:
 
diff --git a/src/lib.rs b/src/lib.rs
index 4e431d6..113d7c5 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -12,15 +12,15 @@
 //!
 //! - h:Hour.Support string value: ["h" | "H" | "Hour" | "HOUR" | "hour"]. e.g. 1h
 //!
-//! - m:Minute.Support string value: ["m" | "M" | "Minute" | "MINUTE" | "minute"]. e.g. 1m
+//! - m:Minute.Support string value: ["m" | "M" | "Minute" | "MINUTE" | "minute" | "min" | "MIN"]. e.g. 1m
 //!
-//! - s:Second.Support string value: ["s" | "S" | "Second" | "SECOND" | "second", "sec"]. e.g. 1s
+//! - s:Second.Support string value: ["s" | "S" | "Second" | "SECOND" | "second" | "sec" | "SEC"]. e.g. 1s
 //!
-//! - ms:Millisecond.Support string value: ["ms" | "MS" | "Millisecond" | "MilliSecond" | "MILLISECOND" | "millisecond", "mSEC"]. e.g. 1ms
+//! - ms:Millisecond.Support string value: ["ms" | "MS" | "Millisecond" | "MilliSecond" | "MILLISECOND" | "millisecond" | "mSEC" ]. e.g. 1ms
 //!
-//! - µs:Microsecond.Support string value: ["µs" | "µS" | "µsecond" | "Microsecond" | "MicroSecond" | "MICROSECOND" | "microsecond", "µSEC"]. e.g. 1µs
+//! - µs:Microsecond.Support string value: ["µs" | "µS" | "µsecond" | "Microsecond" | "MicroSecond" | "MICROSECOND" | "microsecond" | "µSEC"]. e.g. 1µs
 //!
-//! - ns:Nanosecond.Support string value: ["ns" | "NS" | "Nanosecond" | "NanoSecond" | "NANOSECOND" | "nanosecond", "nSEC"]. e.g. 1ns
+//! - ns:Nanosecond.Support string value: ["ns" | "NS" | "Nanosecond" | "NanoSecond" | "NANOSECOND" | "nanosecond" | "nSEC"]. e.g. 1ns
 //!
 //! Also,`duration_str` support time duration simple evaluation(+,*). See example:
 //!