diff --git a/Cargo.toml b/Cargo.toml
index 4f39ac3..ed2dcb5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -32,6 +32,7 @@ ansi-to-tui = "7"
 anyhow = "1"
 bumpalo = "3.16.0"
 clap = { version = "4.0.0", features = ["cargo", "derive", "env", "string", "wrap_help"] }
+clap_lex = ">= 1.0.0, < 1.1.0"
 crossterm = { version = "0.28", features = ["windows"] }
 encoding_rs = "0.8.35"
 glob = "0.3.1"
diff --git a/README.md b/README.md
index 322553c..a200d7d 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,7 @@ Uses [difftastic](https://difftastic.wilfred.me/) for structural, syntax-aware d
 ### Install from crates.io
 
 ```bash
-cargo install ripdiff
+cargo install --locked ripdiff
 ```
 
 This installs `ripdiff` into `~/.cargo/bin/`.