diff --git a/core/Cargo.toml b/core/Cargo.toml
index 31ac4df4..28e8ed27 100644
--- a/core/Cargo.toml
+++ b/core/Cargo.toml
@@ -24,7 +24,7 @@ backtrace = { version = "0.3.60", optional = true }
 libc = "0.2.95"
 
 [target.'cfg(target_os = "redox")'.dependencies]
-redox_syscall = "0.4"
+redox_syscall = "0.5"
 
 [target.'cfg(windows)'.dependencies]
 windows-targets = "0.52.0"