diff --git a/Cargo.toml b/Cargo.toml
index eb75a8dba..064fb0461 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -26,7 +26,7 @@ authors = [
 ]
 license = "Apache-2.0"
 repository = "https://github.com/tokio-rs/prost"
-rust-version = "1.71.1"
+rust-version = "1.80"
 edition = "2021"
 
 [profile.bench]
diff --git a/prost-build/Cargo.toml b/prost-build/Cargo.toml
index 08331b5ef..c8f20dfa8 100644
--- a/prost-build/Cargo.toml
+++ b/prost-build/Cargo.toml
@@ -24,7 +24,6 @@ petgraph = { version = "0.6", default-features = false }
 prost = { version = "0.13.2", path = "../prost", default-features = false }
 prost-types = { version = "0.13.2", path = "../prost-types", default-features = false }
 tempfile = "3"
-once_cell = "1.17.1"
 regex = { version = "1.8.1", default-features = false, features = ["std", "unicode-bool"] }
 
 # feature: format
diff --git a/prost-build/src/ast.rs b/prost-build/src/ast.rs
index 9a6a0de99..07c6394ad 100644
--- a/prost-build/src/ast.rs
+++ b/prost-build/src/ast.rs
@@ -1,8 +1,8 @@
-use once_cell::sync::Lazy;
 use prost_types::source_code_info::Location;
 #[cfg(feature = "cleanup-markdown")]
 use pulldown_cmark::{CodeBlockKind, Event, Options, Parser, Tag};
 use regex::Regex;
+use std::sync::LazyLock;
 
 /// Comments on a Protobuf item.
 #[derive(Debug, Default, Clone)]
@@ -110,9 +110,10 @@ impl Comments {
     ///     - escape urls as <http://foo.com>
     ///     - escape `[` & `]` if not already escaped and not followed by a parenthesis or bracket
     fn sanitize_line(line: &str) -> String {
-        static RULE_URL: Lazy<Regex> = Lazy::new(|| Regex::new(r"https?://[^\s)]+").unwrap());
-        static RULE_BRACKETS: Lazy<Regex> =
-            Lazy::new(|| Regex::new(r"(^|[^\]\\])\[(([^\]]*[^\\])?)\]([^(\[]|$)").unwrap());
+        static RULE_URL: LazyLock<Regex> =
+            LazyLock::new(|| Regex::new(r"https?://[^\s)]+").unwrap());
+        static RULE_BRACKETS: LazyLock<Regex> =
+            LazyLock::new(|| Regex::new(r"(^|[^\]\\])\[(([^\]]*[^\\])?)\]([^(\[]|$)").unwrap());
 
         let mut s = RULE_URL.replace_all(line, r"<$0>").to_string();
         s = RULE_BRACKETS.replace_all(&s, r"$1\[$2\]$4").to_string();