diff --git a/src/cmd/pick.rs b/src/cmd/pick.rs
index a881d94..9297a93 100644
--- a/src/cmd/pick.rs
+++ b/src/cmd/pick.rs
@@ -44,7 +44,7 @@ impl PickArgs {
     /// `pick` handler
     pub async fn run(&self) -> Result<(), Error> {
         use crate::cache::Cache;
-        use rand::Rng;
+        use rand::RngExt;
 
         let cache = Cache::new()?;
         let mut problems = cache.get_problems()?;
diff --git a/src/plugins/mod.rs b/src/plugins/mod.rs
index 0102ca0..24a944f 100644
--- a/src/plugins/mod.rs
+++ b/src/plugins/mod.rs
@@ -1,10 +1,10 @@
-//! Leetcode-cil plugins
+//! Leetcode-cli plugins
 //!
 //! + chrome cookie parser
 //! + leetcode API
 //!
 //! ## login to `leetcode.com`
-//! Leetcode-cli use chrome cookie directly, do not need to login, please make sure you have loggined in `leetcode.com` before usnig `leetcode-cli`
+//! Leetcode-cli use chrome cookie directly, do not need to login, please make sure you have logged into `leetcode.com` before using `leetcode-cli`
 //!
 
 // FIXME: Read cookies from local storage. (issue #122)