diff --git a/Cargo.lock b/Cargo.lock
index 6ce8e52..bee9597 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,5 +1,7 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+version = 3
+
 [[package]]
 name = "aho-corasick"
 version = "0.7.15"
@@ -453,12 +455,11 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 [[package]]
 name = "lexical-core"
 version = "0.7.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "db65c6da02e61f55dae90a0ae427b2a5f6b3e8db09f58d10efab23af92592616"
+source = "git+https://github.com/Gelbpunkt/rust-lexical?branch=fix-warnings-and-update-deps#601c9bfe16c944948d4c4a07e3c67878d72f6445"
 dependencies = [
  "arrayvec",
  "bitflags",
- "cfg-if 0.1.10",
+ "cfg-if 1.0.0",
  "ryu",
  "static_assertions",
 ]
@@ -868,7 +869,7 @@ dependencies = [
 
 [[package]]
 name = "rtfcre"
-version = "2.0.0-dev3"
+version = "2.0.0-dev4"
 dependencies = [
  "criterion",
  "encoding_rs",
diff --git a/Cargo.toml b/Cargo.toml
index 49db763..2239c17 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,6 +10,9 @@ readme = "README.md"
 [package.metadata.maturin]
 classifier = ["Programming Language :: Python :: Implementation :: CPython", "Programming Language :: Python :: 3.7", "Programming Language :: Python :: 3.8", "Programming Language :: Python :: 3.9"]
 
+[patch.crates-io]
+lexical-core = {git = 'https://github.com/Gelbpunkt/rust-lexical', branch = 'fix-warnings-and-update-deps'}
+
 [lib]
 name = "rtfcre"
 crate_type = ["cdylib"]