diff --git a/.travis.yml b/.travis.yml
index 164405b..93d7413 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,7 +18,7 @@ matrix:
 
     # Minimum Rust supported channel.
     - os: linux
-      rust: 1.31.0
+      rust: 1.36.0
       env: TARGET=x86_64-unknown-linux-gnu
 
 
diff --git a/README.md b/README.md
index 10d8dc9..be5ac38 100644
--- a/README.md
+++ b/README.md
@@ -82,7 +82,7 @@ or Windows Terminal since Windows 10 1903).
 
 ### Via cargo
 
-If you have Rust 1.31 or higher, you can install `hexyl` from source via `cargo`:
+If you have Rust 1.36 or higher, you can install `hexyl` from source via `cargo`:
 ```
 cargo install hexyl
 ```
diff --git a/src/bin/hexyl.rs b/src/bin/hexyl.rs
index db0a82d..a9e8bb9 100644
--- a/src/bin/hexyl.rs
+++ b/src/bin/hexyl.rs
@@ -3,7 +3,6 @@ extern crate clap;
 
 use atty;
 
-use std::cell::RefCell;
 use std::fs::File;
 use std::io::{self, prelude::*, SeekFrom};
 
@@ -91,7 +90,7 @@ fn run() -> Result<(), Box<dyn std::error::Error>> {
 
     let mut reader: Input = match matches.value_of("file") {
         Some(filename) => Input::File(File::open(filename)?),
-        None => Input::Stdin(RefCell::new(stdin.lock())),
+        None => Input::Stdin(stdin.lock()),
     };
 
     let skip_arg = matches.value_of("skip");
diff --git a/src/input.rs b/src/input.rs
index 131541a..4de746b 100644
--- a/src/input.rs
+++ b/src/input.rs
@@ -1,17 +1,16 @@
-use std::cell::RefCell;
 use std::fs;
 use std::io::{self, Read, Seek, SeekFrom};
 
 pub enum Input<'a> {
     File(fs::File),
-    Stdin(RefCell<io::StdinLock<'a>>),
+    Stdin(io::StdinLock<'a>),
 }
 
 impl<'a> Read for Input<'a> {
     fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
         match *self {
             Input::File(ref mut file) => file.read(buf),
-            Input::Stdin(ref mut stdin) => stdin.borrow_mut().read(buf),
+            Input::Stdin(ref mut stdin) => stdin.read(buf),
         }
     }
 }
@@ -31,8 +30,8 @@ impl<'a> Seek for Input<'a> {
 impl<'a> Input<'a> {
     pub fn into_inner(self) -> Box<dyn Read + 'a> {
         match self {
-            Self::File(file) => Box::new(file),
-            Self::Stdin(stdin) => Box::new(stdin.into_inner()),
+            Input::File(file) => Box::new(file),
+            Input::Stdin(stdin) => Box::new(stdin),
         }
     }
 }