diff --git a/rust/Cargo.toml b/rust/Cargo.toml
index a870cd09..2997bc7a 100644
--- a/rust/Cargo.toml
+++ b/rust/Cargo.toml
@@ -22,7 +22,7 @@ ripemd = {version = "0.1.1", optional = true, default-features = false}
 sha2 = {version = "0.10.2", optional = true, default-features = false}
 sha3 = {version = "0.10.2", optional = true, default-features = false}
 serde = {version = "1.0", optional = true, default-features = false}
-informalsystems-pbjson = { git = "https://github.com/informalsystems/pbjson", rev = "e54f504", default-features = false, optional = true }
+informalsystems-pbjson = { git = "https://github.com/informalsystems/pbjson", rev = "e54f504", optional = true, default-features = false }
 
 [dev-dependencies]
 ripemd = {version = "0.1.1"}
@@ -32,10 +32,10 @@ sha2 = {version = "0.10.2"}
 sha3 = {version = "0.10.2"}
 
 [features]
-default = ["std", "host-functions", "serde"]
+default = ["std", "host-functions"]
 
-std = ["prost/std", "bytes/std", "hex/std", "anyhow/std"]
+std = ["prost/std", "bytes/std", "hex/std", "anyhow/std", "informalsystems-pbjson/std", "serde/std"]
 
 host-functions = ["sha2", "sha3", "ripemd"]
 
-serde = ["serde/std", "informalsystems-pbjson/std"]
+serde = ["dep:serde", "informalsystems-pbjson"]