diff --git a/Cargo.toml b/Cargo.toml
index 0fa4332..ae965c6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -45,7 +45,7 @@ expr-count = ["expressions", "rusty_expressions/expr-count"]
 # Pin exactly: earlier releases had UAFs on all targets. Kept in step with
 # rusty_expressions, which moved to 1.1.4 -- a consumer that enables both
 # crates' allocators would otherwise pull two incompatible majors.
-rusty_alloc-api = { version = "=1.1.6", optional = true }
+rusty_alloc-api = { version = "=2.2.2", optional = true }
 # The Oniguruma remake, split out of this repo and published standalone.
 # `default-features = false` is LOAD-BEARING: rusty_expressions installs
 # rusty_alloc as a #[global_allocator] by default, and so does this crate --