diff --git a/ext/ruby_native_statistics/Cargo.toml b/ext/ruby_native_statistics/Cargo.toml
index 9a98762..5ef655b 100644
--- a/ext/ruby_native_statistics/Cargo.toml
+++ b/ext/ruby_native_statistics/Cargo.toml
@@ -11,7 +11,7 @@ rb-sys-env = "0.2"
 
 [dev-dependencies]
 rb-sys-env = { version = "0.2" }
-rb-sys-test-helpers = { version = "0.2" }
+rb-sys-test-helpers = { version = "0.3" }
 
 [dependencies]
 magnus = { version = "0.8.0" }