--- a/examples/test1.rs	Thu Dec 10 22:48:52 2020 +0800
+++ b/examples/test1.rs	Fri Dec 11 00:52:49 2020 +0800
@@ -9,7 +9,7 @@
     i: Instant,
 }
 
-#[memoize(Capacity: 123, TimeToLive: Duration::from_secs(2))]
+#[memoize(TimeToLive: Duration::from_secs(2), Capacity: 123)]
 fn hello(key: String) -> ComplexStruct {
     println!("hello: {}", key);
     ComplexStruct {
@@ -25,7 +25,7 @@
     println!("result: {:?}", hello("ABC".to_string()));
     println!("result: {:?}", hello("DEF".to_string()));
     println!("result: {:?}", hello("ABC".to_string()));  //Same as first
-    thread::sleep(Duration::from_millis(2100));
+    thread::sleep(core::time::Duration::from_millis(2100));
     println!("result: {:?}", hello("EFG".to_string()));
     println!("result: {:?}", hello("ABC".to_string()));  //Refreshed
     println!("result: {:?}", hello("EFG".to_string()));  //Same as first

--- a/src/lib.rs	Thu Dec 10 22:48:52 2020 +0800
+++ b/src/lib.rs	Fri Dec 11 00:52:49 2020 +0800
@@ -46,8 +46,7 @@
 #[cfg(feature = "full")]
 mod store {
     use proc_macro::TokenStream;
-    use syn::{parse as p, ExprCall};
-    use std::time::Duration;
+    use syn::{parse as p, ExprCall, ExprMethodCall, Expr};
     use syn::export::ToTokens;
     use syn::spanned::Spanned;
     use std::ops::Deref;
@@ -56,13 +55,13 @@
     #[derive(Default, Clone)]
     pub(crate) struct CacheOptions {
         lru_max_entries: Option<usize>,
-        pub(crate) time_to_live: Option<ExprCall>,
+        pub(crate) time_to_live: Option<Expr>,
     }
 
     #[derive(Clone)]
     enum CacheOption {
         LRUMaxEntries(usize),
-        TimeToLive(ExprCall),
+        TimeToLive(Expr),
     }
 
     syn::custom_keyword!(Capacity);
@@ -83,7 +82,7 @@
             if la.peek(TimeToLive) {
                 let _: TimeToLive = input.parse().unwrap();
                 let _: Colon = input.parse().unwrap();
-                let cap: syn::ExprCall = input.parse().unwrap();
+                let cap: syn::Expr = input.parse().unwrap();
 
                 return Ok(CacheOption::TimeToLive(cap));
             }