diff --git a/Cargo.toml b/Cargo.toml
index 91d7da42..b9913068 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "yaml-rust"
-version = "0.4.5" # remember to update html_root_url
+version = "0.4.6" # remember to update html_root_url
 authors = ["Yuheng Chen <yuhengchen@sensetime.com>"]
 homepage = "http://chyh1990.github.io/yaml-rust/"
 documentation = "https://docs.rs/yaml-rust"
@@ -14,4 +14,4 @@ edition = "2018"
 linked-hash-map = "0.5.3"
 
 [dev-dependencies]
-quickcheck = "0.9"
+quickcheck = "1"
diff --git a/src/emitter.rs b/src/emitter.rs
index f20a3ed6..d9cc5a19 100644
--- a/src/emitter.rs
+++ b/src/emitter.rs
@@ -365,7 +365,7 @@ a4:
         println!("emitted:\n{}", writer);
         let docs_new = match YamlLoader::load_from_str(&writer) {
             Ok(y) => y,
-            Err(e) => panic!(format!("{}", e)),
+            Err(e) => panic!("{}", e),
         };
         let doc_new = &docs_new[0];
 
@@ -402,7 +402,7 @@ products:
         }
         let docs_new = match YamlLoader::load_from_str(&writer) {
             Ok(y) => y,
-            Err(e) => panic!(format!("{}", e)),
+            Err(e) => panic!("{}", e),
         };
         let doc_new = &docs_new[0];
         assert_eq!(doc, doc_new);
diff --git a/src/lib.rs b/src/lib.rs
index ae95e0fb..caf42707 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -36,7 +36,7 @@
 //!
 //! ```
 
-#![doc(html_root_url = "https://docs.rs/yaml-rust/0.4.5")]
+#![doc(html_root_url = "https://docs.rs/yaml-rust/0.4.6")]
 #![cfg_attr(feature = "cargo-clippy", allow(renamed_and_removed_lints))]
 #![cfg_attr(feature = "cargo-clippy", warn(cyclomatic_complexity))]
 #![cfg_attr(