diff --git a/src/expr/Cargo.toml b/src/expr/Cargo.toml
index 94e274a0343..2f40d3bbe26 100644
--- a/src/expr/Cargo.toml
+++ b/src/expr/Cargo.toml
@@ -10,7 +10,7 @@ path = "expr.rs"
 
 [dependencies]
 libc = "0.2.42"
-onig = "3.1.1"
+onig = "4.2.1"
 uucore = { path="../uucore" }
 
 [[bin]]