diff --git a/libs/aarch64-apple-darwin/librln.a b/libs/aarch64-apple-darwin/librln.a
index 6ef1bed..e7b0e94 100644
Binary files a/libs/aarch64-apple-darwin/librln.a and b/libs/aarch64-apple-darwin/librln.a differ
diff --git a/libs/x86_64-apple-darwin/librln.a b/libs/x86_64-apple-darwin/librln.a
index bb13f75..aa76dd3 100644
Binary files a/libs/x86_64-apple-darwin/librln.a and b/libs/x86_64-apple-darwin/librln.a differ
diff --git a/rln/librln.h b/rln/librln.h
index b7c6a71..60e4545 100644
--- a/rln/librln.h
+++ b/rln/librln.h
@@ -45,6 +45,11 @@ bool set_leaves_from(struct RLN *ctx, uintptr_t index, const struct Buffer *inpu
 
 bool init_tree_with_leaves(struct RLN *ctx, const struct Buffer *input_buffer);
 
+bool atomic_operation(struct RLN *ctx,
+                      uintptr_t index,
+                      const struct Buffer *leaves_buffer,
+                      const struct Buffer *indices_buffer);
+
 bool get_root(const struct RLN *ctx, struct Buffer *output_buffer);
 
 bool get_proof(const struct RLN *ctx, uintptr_t index, struct Buffer *output_buffer);
diff --git a/rln/wrapper.go b/rln/wrapper.go
index 1a5e336..0d6c153 100644
--- a/rln/wrapper.go
+++ b/rln/wrapper.go
@@ -132,6 +132,12 @@ func (r *RLN) SetLeavesFrom(index uint, idcommitments []byte) bool {
 	return bool(C.set_leaves_from(r.ptr, C.uintptr_t(index), idCommBuffer))
 }
 
+func (r *RLN) AtomicOperation(index uint, leaves []byte, indices []byte) bool {
+	leavesBuffer := toCBufferPtr(leaves)
+	indicesBuffer := toCBufferPtr(indices)
+	return bool(C.atomic_operation(r.ptr, C.uintptr_t(index), leavesBuffer, indicesBuffer))
+}
+
 func (r *RLN) DeleteLeaf(index uint) bool {
 	return bool(C.delete_leaf(r.ptr, C.uintptr_t(index)))
 }
diff --git a/scripts/build.sh b/scripts/build.sh
index 03e7e43..8699062 100755
--- a/scripts/build.sh
+++ b/scripts/build.sh
@@ -4,8 +4,6 @@ export RUSTFLAGS="-Ccodegen-units=1"
 
 rustup default stable
 
-cargo install cross --git https://github.com/cross-rs/cross --branch main
-
 pushd zerokit/rln
 
 cargo clean
diff --git a/zerokit b/zerokit
index 2e868d6..c2d386c 160000
--- a/zerokit
+++ b/zerokit
@@ -1 +1 @@
-Subproject commit 2e868d6cbf68ee0f87975a89a25aa0333971d398
+Subproject commit c2d386cb749f551541bb34c4386a3849485356f9