diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index de84723..f95f704 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -20,7 +20,7 @@ jobs:
       endpoint: alecmocatta
       default:
         rust_toolchain: nightly
-        rust_lint_toolchain: nightly-2019-11-14
+        rust_lint_toolchain: nightly-2020-01-18
         rust_flags: ''
         rust_features: 'no_alloc;no_alloc distribute_binaries'
         rust_target_check: ''
diff --git a/constellation-internal/src/ext.rs b/constellation-internal/src/ext.rs
index d6a7c3b..eff51ba 100644
--- a/constellation-internal/src/ext.rs
+++ b/constellation-internal/src/ext.rs
@@ -153,7 +153,7 @@ pub fn parse_mem_size(input: &str) -> Result<u64, ()> {
 	if index == input.len() {
 		return Ok(a);
 	}
-	let (b, b1): (u64, u32) = if input[index..=index].chars().nth(0).ok_or(())? == '.' {
+	let (b, b1): (u64, u32) = if input[index..=index].chars().next().ok_or(())? == '.' {
 		index += 1;
 		let index1 = index;
 		index = index
@@ -172,7 +172,7 @@ pub fn parse_mem_size(input: &str) -> Result<u64, ()> {
 	} else {
 		(0, 0)
 	};
-	if index + 1 < input.len() && input[index..=index].chars().nth(0).ok_or(())? == ' ' {
+	if index + 1 < input.len() && input[index..=index].chars().next().ok_or(())? == ' ' {
 		index += 1;
 	}
 	let c: u64 = match &input[index..] {
@@ -203,7 +203,7 @@ pub fn parse_cpu_size(input: &str) -> Result<u32, ()> {
 	if index == input.len() {
 		return Ok(a * 65536);
 	}
-	let (b, b1): (u64, u32) = if input[index..=index].chars().nth(0).ok_or(())? == '.' {
+	let (b, b1): (u64, u32) = if input[index..=index].chars().next().ok_or(())? == '.' {
 		index += 1;
 		let index1 = index;
 		index = index
diff --git a/constellation-internal/src/lib.rs b/constellation-internal/src/lib.rs
index 0bfae4a..6cec597 100644
--- a/constellation-internal/src/lib.rs
+++ b/constellation-internal/src/lib.rs
@@ -20,7 +20,8 @@
 	clippy::if_not_else,
 	clippy::inline_always,
 	clippy::must_use_candidate,
-	clippy::double_must_use
+	clippy::double_must_use,
+	clippy::missing_errors_doc
 )]
 
 mod ext;
@@ -280,8 +281,8 @@ pub enum Format {
 /// ```
 /// # use constellation_internal::Resources;
 /// pub const RESOURCES_DEFAULT: Resources = Resources {
-/// 	mem: 100 * 1024 * 1024, // 100 MiB
-/// 	cpu: 65536 / 16,        // 1/16th of a logical CPU core
+///     mem: 100 * 1024 * 1024, // 100 MiB
+///     cpu: 65536 / 16,        // 1/16th of a logical CPU core
 /// };
 /// ```
 #[derive(Copy, Clone, PartialEq, Serialize, Deserialize, Debug)]
@@ -301,8 +302,8 @@ impl Default for Resources {
 /// ```
 /// # use constellation_internal::Resources;
 /// pub const RESOURCES_DEFAULT: Resources = Resources {
-/// 	mem: 100 * 1024 * 1024, // 100 MiB
-/// 	cpu: 65536 / 16,        // 1/16th of a logical CPU core
+///     mem: 100 * 1024 * 1024, // 100 MiB
+///     cpu: 65536 / 16,        // 1/16th of a logical CPU core
 /// };
 /// ```
 pub const RESOURCES_DEFAULT: Resources = Resources {
diff --git a/src/bin/cargo-deploy.rs b/src/bin/cargo-deploy.rs
index 322d08e..6e226af 100644
--- a/src/bin/cargo-deploy.rs
+++ b/src/bin/cargo-deploy.rs
@@ -53,7 +53,7 @@ fn main() {
 			if artifact.target.kind == vec![String::from("bin")] {
 				assert_eq!(artifact.filenames.len(), 1);
 				assert!(bin.is_none());
-				bin = Some(artifact.filenames.into_iter().nth(0).unwrap());
+				bin = Some(artifact.filenames.into_iter().next().unwrap());
 			}
 		}
 	}
diff --git a/tests/tester/ext.rs b/tests/tester/ext.rs
index 70f92de..cafd7bd 100644
--- a/tests/tester/ext.rs
+++ b/tests/tester/ext.rs
@@ -69,8 +69,8 @@ pub mod serde_regex {
 		S: Serializer,
 	{
 		let x = value.as_str();
-		assert_eq!(x.chars().nth(0).unwrap(), '^');
-		assert_eq!(x.chars().rev().nth(0).unwrap(), '$');
+		assert_eq!(x.chars().next().unwrap(), '^');
+		assert_eq!(x.chars().rev().next().unwrap(), '$');
 		serializer.serialize_str(&x[1..x.len() - 1])
 	}
 	pub fn deserialize<'de, D>(deserializer: D) -> Result<Regex, D::Error>
diff --git a/tests/tester/main.rs b/tests/tester/main.rs
index 1553a3f..91dbbbf 100644
--- a/tests/tester/main.rs
+++ b/tests/tester/main.rs
@@ -314,7 +314,7 @@ fn main() {
 					// assert_eq!(artifact.filenames.len(), 1, "{:?}", artifact);
 					let x = products.insert(
 						path.to_owned(),
-						artifact.filenames.into_iter().nth(0).unwrap(),
+						artifact.filenames.into_iter().next().unwrap(),
 					);
 					assert!(x.is_none());
 				}