diff --git a/Cargo.toml b/Cargo.toml
index 8d73167..32fd792 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,5 +7,7 @@ edition = "2018"
 [dependencies]
 rocket = "0.4.4"
 rocket_contrib = {version = "0.4.4", features = ["tera_templates"]}
-qrcode-generator = "1.0.6"
 base64 = "0.12.0"
+serde = "1.0"
+serde_json = "1.0"
+serde_derive = "1.0"