diff --git a/Cargo.toml b/Cargo.toml
index 4388f30b5..af34f5fa9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -33,7 +33,6 @@ filetime = "0.2"
 fnv = "1.0"
 getopts = "0.2"
 glob = "0.3"
-lazy_static = "1.4"
 indexmap = "2"
 num-traits = "0.2"
 packedvec = "1.2"
diff --git a/cfgrammar/Cargo.toml b/cfgrammar/Cargo.toml
index af2ae3696..5acf3affa 100644
--- a/cfgrammar/Cargo.toml
+++ b/cfgrammar/Cargo.toml
@@ -19,7 +19,6 @@ path = "src/lib/mod.rs"
 
 [dependencies]
 bincode = { workspace = true, optional = true, features = ["derive"] }
-lazy_static.workspace = true
 indexmap.workspace = true
 num-traits.workspace = true
 regex.workspace = true
diff --git a/cfgrammar/src/lib/header.rs b/cfgrammar/src/lib/header.rs
index ec2fb4ccc..a0e729ac1 100644
--- a/cfgrammar/src/lib/header.rs
+++ b/cfgrammar/src/lib/header.rs
@@ -5,9 +5,8 @@ use crate::{
         YaccGrammarError, YaccGrammarErrorKind, YaccKind, YaccOriginalActionKind, parser::SpansKind,
     },
 };
-use lazy_static::lazy_static;
 use regex::{Regex, RegexBuilder};
-use std::{error::Error, fmt};
+use std::{error::Error, fmt, sync::LazyLock};
 
 /// An error regarding the `%grmtools` header section.
 ///
@@ -247,15 +246,16 @@ impl<T> Value<T> {
     }
 }
 
-lazy_static! {
-    static ref RE_LEADING_WS: Regex = Regex::new(r"^[\p{Pattern_White_Space}]*").unwrap();
-    static ref RE_NAME: Regex = RegexBuilder::new(r"^[A-Z][A-Z_]*")
+static RE_LEADING_WS: LazyLock<Regex> =
+    LazyLock::new(|| Regex::new(r"^[\p{Pattern_White_Space}]*").unwrap());
+static RE_NAME: LazyLock<Regex> = LazyLock::new(|| {
+    RegexBuilder::new(r"^[A-Z][A-Z_]*")
         .case_insensitive(true)
         .build()
-        .unwrap();
-    static ref RE_DIGITS: Regex = Regex::new(r"^[0-9]+").unwrap();
-    static ref RE_STRING: Regex = Regex::new(r#"^\"(\\.|[^"\\])*\""#).unwrap();
-}
+        .unwrap()
+});
+static RE_DIGITS: LazyLock<Regex> = LazyLock::new(|| Regex::new(r"^[0-9]+").unwrap());
+static RE_STRING: LazyLock<Regex> = LazyLock::new(|| Regex::new(r#"^\"(\\.|[^"\\])*\""#).unwrap());
 
 const MAGIC: &str = "%grmtools";
 
diff --git a/cfgrammar/src/lib/yacc/parser.rs b/cfgrammar/src/lib/yacc/parser.rs
index b73fc3767..eaab7dead 100644
--- a/cfgrammar/src/lib/yacc/parser.rs
+++ b/cfgrammar/src/lib/yacc/parser.rs
@@ -2,7 +2,6 @@
 
 #[cfg(feature = "bincode")]
 use bincode::{Decode, Encode};
-use lazy_static::lazy_static;
 use num_traits::PrimInt;
 use regex::Regex;
 #[cfg(feature = "serde")]
@@ -12,6 +11,7 @@ use std::{
     error::Error,
     fmt,
     str::FromStr,
+    sync::LazyLock,
 };
 
 use crate::{
@@ -286,11 +286,10 @@ pub(crate) struct YaccParser<'a> {
     global_actiontype: Option<(String, Span)>,
 }
 
-lazy_static! {
-    static ref RE_NAME: Regex = Regex::new(r"^[a-zA-Z_.][a-zA-Z0-9_.]*").unwrap();
-    static ref RE_TOKEN: Regex =
-        Regex::new("^(?:(\".+?\")|('.+?')|([a-zA-Z_][a-zA-Z_0-9]*))").unwrap();
-}
+static RE_NAME: LazyLock<Regex> =
+    LazyLock::new(|| Regex::new(r"^[a-zA-Z_.][a-zA-Z0-9_.]*").unwrap());
+static RE_TOKEN: LazyLock<Regex> =
+    LazyLock::new(|| Regex::new("^(?:(\".+?\")|('.+?')|([a-zA-Z_][a-zA-Z_0-9]*))").unwrap());
 
 fn add_duplicate_occurrence(
     errs: &mut Vec<YaccGrammarError>,
diff --git a/lrlex/Cargo.toml b/lrlex/Cargo.toml
index c72afbedf..1c8ea0da5 100644
--- a/lrlex/Cargo.toml
+++ b/lrlex/Cargo.toml
@@ -28,7 +28,6 @@ cfgrammar = { path = "../cfgrammar", version = "0.13" }
 lrpar = { path = "../lrpar", version = "0.13" }
 
 getopts.workspace = true
-lazy_static.workspace = true
 regex.workspace = true
 regex-syntax.workspace = true
 num-traits.workspace = true
diff --git a/lrlex/src/lib/ctbuilder.rs b/lrlex/src/lib/ctbuilder.rs
index 3614cae9d..194dba24b 100644
--- a/lrlex/src/lib/ctbuilder.rs
+++ b/lrlex/src/lib/ctbuilder.rs
@@ -11,7 +11,7 @@ use std::{
     hash::Hash,
     io::Write,
     path::{Path, PathBuf},
-    sync::Mutex,
+    sync::{LazyLock, Mutex},
 };
 
 use bincode::Encode;
@@ -24,7 +24,6 @@ use cfgrammar::{
     span::{Location, Span},
 };
 use glob::glob;
-use lazy_static::lazy_static;
 use lrpar::{
     CTParserBuilder, LexerTypes,
     diagnostics::{DiagnosticFormatter, SpannedDiagnosticFormatter},
@@ -41,10 +40,11 @@ const RUST_FILE_EXT: &str = "rs";
 const ERROR: &str = "[Error]";
 const WARNING: &str = "[Warning]";
 
-lazy_static! {
-    static ref RE_TOKEN_ID: Regex = Regex::new(r"^[a-zA-Z_][a-zA-Z_0-9]*$").unwrap();
-    static ref GENERATED_PATHS: Mutex<HashSet<PathBuf>> = Mutex::new(HashSet::new());
-}
+static RE_TOKEN_ID: LazyLock<Regex> =
+    LazyLock::new(|| Regex::new(r"^[a-zA-Z_][a-zA-Z_0-9]*$").unwrap());
+
+static GENERATED_PATHS: LazyLock<Mutex<HashSet<PathBuf>>> =
+    LazyLock::new(|| Mutex::new(HashSet::new()));
 
 #[non_exhaustive]
 pub enum LexerKind {
diff --git a/lrlex/src/lib/parser.rs b/lrlex/src/lib/parser.rs
index 636844733..784a83f11 100644
--- a/lrlex/src/lib/parser.rs
+++ b/lrlex/src/lib/parser.rs
@@ -1,5 +1,4 @@
 use cfgrammar::Span;
-use lazy_static::lazy_static;
 use lrpar::LexerTypes;
 use num_traits::AsPrimitive;
 use proc_macro2::TokenStream;
@@ -12,28 +11,34 @@ use crate::{
 };
 use std::borrow::{Borrow as _, Cow};
 use std::ops::Not;
+use std::sync::LazyLock;
 
 type LexInternalBuildResult<T> = Result<T, LexBuildError>;
 
-lazy_static! {
-    static ref RE_START_STATE_NAME: Regex = Regex::new(r"^[a-zA-Z][a-zA-Z0-9_.]*$").unwrap();
-    static ref RE_INCLUSIVE_START_STATE_DECLARATION: Regex =
-        Regex::new(r"^%[sS][a-zA-Z0-9]*$").unwrap();
-    static ref RE_EXCLUSIVE_START_STATE_DECLARATION: Regex =
-        Regex::new(r"^%[xX][a-zA-Z0-9]*$").unwrap();
-    // Documented in `Escape sequences` in lexcompatibility.m
-    static ref RE_LEX_ESC_LITERAL: Regex =
-        Regex::new(r"^(([xuU][[:xdigit:]])|[[:digit:]]|[afnrtv\\]|[pP]|[dDsSwW]|[Az])").unwrap();
-    // Vertical line separators.
-    static ref RE_LINE_SEP: Regex = Regex::new(r"[\p{Pattern_White_Space}&&[\p{Zl}\p{Zp}\n\r\v]]").unwrap();
-    static ref RE_LEADING_LINE_SEPS: Regex = Regex::new(r"^[\p{Pattern_White_Space}&&[\p{Zl}\p{Zp}\n\r\v]]*").unwrap();
-    // Horizontal space separators
-    static ref RE_SPACE_SEP: Regex = Regex::new(r"[\p{Pattern_White_Space}&&[\p{Zs}\t]]").unwrap();
-    static ref RE_LEADING_SPACE_SEPS: Regex = Regex::new(r"^[\p{Pattern_White_Space}&&[\p{Zs}\t]]*").unwrap();
-    static ref RE_LEADING_WS: Regex = Regex::new(r"^[\p{Pattern_White_Space}]*").unwrap();
-    static ref RE_WS: Regex = Regex::new(r"\p{Pattern_White_Space}").unwrap();
-    static ref RE_LEADING_DIGITS: Regex = Regex::new(r"^[0-9]+").unwrap();
-}
+static RE_START_STATE_NAME: LazyLock<Regex> =
+    LazyLock::new(|| Regex::new(r"^[a-zA-Z][a-zA-Z0-9_.]*$").unwrap());
+static RE_INCLUSIVE_START_STATE_DECLARATION: LazyLock<Regex> =
+    LazyLock::new(|| Regex::new(r"^%[sS][a-zA-Z0-9]*$").unwrap());
+static RE_EXCLUSIVE_START_STATE_DECLARATION: LazyLock<Regex> =
+    LazyLock::new(|| Regex::new(r"^%[xX][a-zA-Z0-9]*$").unwrap());
+// Documented in `Escape sequences` in lexcompatibility.m
+static RE_LEX_ESC_LITERAL: LazyLock<Regex> = LazyLock::new(|| {
+    Regex::new(r"^(([xuU][[:xdigit:]])|[[:digit:]]|[afnrtv\\]|[pP]|[dDsSwW]|[Az])").unwrap()
+});
+// Vertical line separators.
+static RE_LINE_SEP: LazyLock<Regex> =
+    LazyLock::new(|| Regex::new(r"[\p{Pattern_White_Space}&&[\p{Zl}\p{Zp}\n\r\v]]").unwrap());
+static RE_LEADING_LINE_SEPS: LazyLock<Regex> =
+    LazyLock::new(|| Regex::new(r"^[\p{Pattern_White_Space}&&[\p{Zl}\p{Zp}\n\r\v]]*").unwrap());
+// Horizontal space separators
+static RE_SPACE_SEP: LazyLock<Regex> =
+    LazyLock::new(|| Regex::new(r"[\p{Pattern_White_Space}&&[\p{Zs}\t]]").unwrap());
+static RE_LEADING_SPACE_SEPS: LazyLock<Regex> =
+    LazyLock::new(|| Regex::new(r"^[\p{Pattern_White_Space}&&[\p{Zs}\t]]*").unwrap());
+static RE_LEADING_WS: LazyLock<Regex> =
+    LazyLock::new(|| Regex::new(r"^[\p{Pattern_White_Space}]*").unwrap());
+static RE_WS: LazyLock<Regex> = LazyLock::new(|| Regex::new(r"\p{Pattern_White_Space}").unwrap());
+
 const INITIAL_START_STATE_NAME: &str = "INITIAL";
 
 #[derive(Debug, Clone)]
diff --git a/lrpar/Cargo.toml b/lrpar/Cargo.toml
index d05d41072..bdaa91ccc 100644
--- a/lrpar/Cargo.toml
+++ b/lrpar/Cargo.toml
@@ -30,7 +30,6 @@ bincode = { workspace = true, features = ["derive"] }
 cactus.workspace = true
 filetime.workspace = true
 indexmap.workspace = true
-lazy_static.workspace = true
 num-traits.workspace = true
 packedvec.workspace = true
 proc-macro2.workspace = true
diff --git a/lrpar/src/lib/ctbuilder.rs b/lrpar/src/lib/ctbuilder.rs
index 19e287c29..0c6bd7d2b 100644
--- a/lrpar/src/lib/ctbuilder.rs
+++ b/lrpar/src/lib/ctbuilder.rs
@@ -11,7 +11,7 @@ use std::{
     io::Write,
     marker::PhantomData,
     path::{Path, PathBuf},
-    sync::Mutex,
+    sync::{LazyLock, Mutex},
 };
 
 use crate::{
@@ -30,12 +30,10 @@ use cfgrammar::{
     yacc::{YaccGrammar, YaccKind, YaccOriginalActionKind, ast::ASTWithValidityInfo},
 };
 use filetime::FileTime;
-use lazy_static::lazy_static;
 use lrtable::{Minimiser, StateGraph, StateTable, from_yacc, statetable::Conflicts};
 use num_traits::{AsPrimitive, PrimInt, Unsigned};
 use proc_macro2::{Literal, TokenStream};
 use quote::{ToTokens, TokenStreamExt, format_ident, quote};
-use regex::Regex;
 
 const ACTION_PREFIX: &str = "__gt_";
 const GLOBAL_PREFIX: &str = "__GT_";
@@ -48,10 +46,8 @@ const RUST_FILE_EXT: &str = "rs";
 const WARNING: &str = "[Warning]";
 const ERROR: &str = "[Error]";
 
-lazy_static! {
-    static ref RE_DOL_NUM: Regex = Regex::new(r"\$([0-9]+)").unwrap();
-    static ref GENERATED_PATHS: Mutex<HashSet<PathBuf>> = Mutex::new(HashSet::new());
-}
+static GENERATED_PATHS: LazyLock<Mutex<HashSet<PathBuf>>> =
+    LazyLock::new(|| Mutex::new(HashSet::new()));
 
 struct CTConflictsError<StorageT: Eq + Hash> {
     conflicts_diagnostic: String,