diff --git a/multi-service/hex_converter/Cargo.toml b/multi-service/hex_converter/Cargo.toml
index 8af964c..3af1628 100644
--- a/multi-service/hex_converter/Cargo.toml
+++ b/multi-service/hex_converter/Cargo.toml
@@ -7,6 +7,6 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-fluence = { version = "0.2.18", features = ["logger"]}
+fluence = { version = "=0.3.3", features = ["logger"] }
 log = "0.4.8"
 serde_json = "1.0.64"
diff --git a/multi-service/hex_converter/src/main.rs b/multi-service/hex_converter/src/main.rs
index 372f411..bd0c6a9 100644
--- a/multi-service/hex_converter/src/main.rs
+++ b/multi-service/hex_converter/src/main.rs
@@ -40,4 +40,4 @@ pub fn hex_to_int(data: String) -> u64 {
     }
 
     0u64
-}
+}
\ No newline at end of file