diff --git a/Cargo.lock b/Cargo.lock
index 9a6dd2e2c0..45ed9fdd6a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -979,15 +979,6 @@ version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e4a24736216ec316047a1fc4252e27dabb04218aa4a3f37c6e7ddbf1f9782b54"
 
-[[package]]
-name = "nom8"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ae01545c9c7fc4486ab7debaf2aad7003ac19431791868fb2e8066df97fad2f8"
-dependencies = [
- "memchr",
-]
-
 [[package]]
 name = "normalize-line-endings"
 version = "0.3.0"
@@ -1483,15 +1474,6 @@ dependencies = [
  "serde",
 ]
 
-[[package]]
-name = "serde_spanned"
-version = "0.6.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0efd8caf556a6cebd3b285caf480045fcc1ac04f6bd786b09a6f11af30c4fcf4"
-dependencies = [
- "serde",
-]
-
 [[package]]
 name = "serde_urlencoded"
 version = "0.7.1"
@@ -1759,36 +1741,11 @@ dependencies = [
 
 [[package]]
 name = "toml"
-version = "0.7.2"
+version = "0.5.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f7afcae9e3f0fe2c370fd4657108972cbb2fa9db1b9f84849cefd80741b01cb6"
+checksum = "1333c76748e868a4d9d1017b5ab53171dfd095f70c712fdb4653a406547f598f"
 dependencies = [
  "serde",
- "serde_spanned",
- "toml_datetime",
- "toml_edit",
-]
-
-[[package]]
-name = "toml_datetime"
-version = "0.6.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3ab8ed2edee10b50132aed5f331333428b011c99402b5a534154ed15746f9622"
-dependencies = [
- "serde",
-]
-
-[[package]]
-name = "toml_edit"
-version = "0.19.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5e6a7712b49e1775fb9a7b998de6635b299237f48b404dde71704f2e0e7f37e5"
-dependencies = [
- "indexmap",
- "nom8",
- "serde",
- "serde_spanned",
- "toml_datetime",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index e84b09fa6c..a9efe64589 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -33,7 +33,7 @@ serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 shlex = "1"
 tempfile = "3.0"
-toml = "0.7.2"
+toml = "0.5.1"
 topological-sort = "0.2.2"
 
 # Watch feature
diff --git a/src/book/init.rs b/src/book/init.rs
index b3d6dd397a..ebcdd9349c 100644
--- a/src/book/init.rs
+++ b/src/book/init.rs
@@ -99,9 +99,7 @@ impl BookBuilder {
     fn write_book_toml(&self) -> Result<()> {
         debug!("Writing book.toml");
         let book_toml = self.root.join("book.toml");
-        let cfg = toml::to_string(&self.config)
-            .with_context(|| "Unable to serialize the config")?
-            .into_bytes();
+        let cfg = toml::to_vec(&self.config).with_context(|| "Unable to serialize the config")?;
 
         File::create(book_toml)
             .with_context(|| "Couldn't create book.toml")?