diff --git a/aqua-examples/decentralized-blockchain-gateway/wasm-modules/multi-provider-query/Cargo.toml b/aqua-examples/decentralized-blockchain-gateway/wasm-modules/multi-provider-query/Cargo.toml
index b12ffc5..5a9b3a3 100644
--- a/aqua-examples/decentralized-blockchain-gateway/wasm-modules/multi-provider-query/Cargo.toml
+++ b/aqua-examples/decentralized-blockchain-gateway/wasm-modules/multi-provider-query/Cargo.toml
@@ -9,6 +9,8 @@ path = "src/main.rs"
 
 [dependencies]
 marine-rs-sdk = "0.7.1"
+serde = "1.0.152"
+serde_json = "1.0.92"
 
 [dev-dependencies]
 marine-rs-sdk-test = "0.8.1"