diff --git a/rust/ares/Cargo.lock b/rust/ares/Cargo.lock
index 679043f..49c4044 100644
--- a/rust/ares/Cargo.lock
+++ b/rust/ares/Cargo.lock
@@ -62,8 +62,6 @@ dependencies = [
 [[package]]
 name = "assert_no_alloc"
 version = "1.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "55ca83137a482d61d916ceb1eba52a684f98004f18e0cafea230fe5579c178a3"
 
 [[package]]
 name = "atty"
diff --git a/rust/ares/Cargo.toml b/rust/ares/Cargo.toml
index 2b3cfe6..0babd64 100644
--- a/rust/ares/Cargo.toml
+++ b/rust/ares/Cargo.toml
@@ -15,9 +15,9 @@ ares_macros = { path = "../ares_macros" }
 # Use this when debugging requires the debug printfs in the PMA
 # ares_pma = { path = "../ares_pma", features=["debug_prints"] }
 ares_pma = { path = "../ares_pma" }
-assert_no_alloc = "1.1.2"
+assert_no_alloc = { path = "../rust-assert-no-alloc" }
 # use this when debugging requires allocation (e.g. eprintln)
-# assert_no_alloc = {version="1.1.2", features=["warn_debug"]}
+# assert_no_alloc = { path = "../rust-assert-no-alloc", features=["warn_debug"] }
 bitvec = "1.0.0"
 criterion = "0.4"
 either = "1.9.0"
diff --git a/rust/rust-assert-no-alloc b/rust/rust-assert-no-alloc
new file mode 160000
index 0000000..11f0f41
--- /dev/null
+++ b/rust/rust-assert-no-alloc
@@ -0,0 +1 @@
+Subproject commit 11f0f41123f7fcaf0ad1c23a6a17d97f4650e824