diff --git a/ibc-apps/ics20-transfer/src/lib.rs b/ibc-apps/ics20-transfer/src/lib.rs
index 8c2c31d9c..2f2bec601 100644
--- a/ibc-apps/ics20-transfer/src/lib.rs
+++ b/ibc-apps/ics20-transfer/src/lib.rs
@@ -24,7 +24,6 @@ pub mod types {
     pub use ibc_app_transfer_types::*;
 }
 
-#[cfg(feature = "serde")]
 pub mod context;
 #[cfg(feature = "serde")]
 pub mod handler;
diff --git a/ibc-apps/ics20-transfer/types/src/amount.rs b/ibc-apps/ics20-transfer/types/src/amount.rs
index 435cdc571..7754f4723 100644
--- a/ibc-apps/ics20-transfer/types/src/amount.rs
+++ b/ibc-apps/ics20-transfer/types/src/amount.rs
@@ -16,8 +16,8 @@ use super::error::TokenTransferError;
 #[derive(Copy, Clone, Debug, Eq, PartialEq, PartialOrd, Ord, Display, From, Into)]
 pub struct Amount(
     #[cfg_attr(feature = "schema", schemars(with = "String"))]
-    #[serde(serialize_with = "serializers::serialize")]
-    #[serde(deserialize_with = "deserialize")]
+    #[cfg_attr(feature = "serde", serde(serialize_with = "serializers::serialize"))]
+    #[cfg_attr(feature = "serde", serde(deserialize_with = "deserialize"))]
     U256,
 );
 
diff --git a/ibc-apps/ics20-transfer/types/src/lib.rs b/ibc-apps/ics20-transfer/types/src/lib.rs
index 44fe89603..9ef3e8413 100644
--- a/ibc-apps/ics20-transfer/types/src/lib.rs
+++ b/ibc-apps/ics20-transfer/types/src/lib.rs
@@ -15,27 +15,18 @@
 #[cfg(any(test, feature = "std"))]
 extern crate std;
 
-#[cfg(feature = "serde")]
 mod amount;
-#[cfg(feature = "serde")]
-pub use amount::*;
-#[cfg(feature = "serde")]
 mod coin;
-#[cfg(feature = "serde")]
-pub use coin::*;
-#[cfg(feature = "serde")]
 mod denom;
-#[cfg(feature = "serde")]
+mod memo;
+
+pub use amount::*;
+pub use coin::*;
 pub use denom::*;
-#[cfg(feature = "serde")]
+pub mod error;
 pub mod events;
-#[cfg(feature = "serde")]
 pub mod msgs;
-#[cfg(feature = "serde")]
 pub mod packet;
-
-pub mod error;
-mod memo;
 pub use memo::*;
 /// Re-exports `U256` from `primitive-types` crate for convenience.
 pub use primitive_types::U256;
diff --git a/ibc-apps/ics721-nft-transfer/types/src/data.rs b/ibc-apps/ics721-nft-transfer/types/src/data.rs
index 098c8c094..c94e9ee31 100644
--- a/ibc-apps/ics721-nft-transfer/types/src/data.rs
+++ b/ibc-apps/ics721-nft-transfer/types/src/data.rs
@@ -2,7 +2,9 @@
 use core::fmt::{self, Display, Formatter};
 use core::str::FromStr;
 
+#[cfg(feature = "serde")]
 use base64::prelude::BASE64_STANDARD;
+#[cfg(feature = "serde")]
 use base64::Engine;
 use ibc_core::primitives::prelude::*;
 use mime::Mime;
@@ -25,6 +27,7 @@ use crate::error::NftTransferError;
 #[derive(Clone, Debug, Default, PartialEq, Eq, derive_more::From)]
 pub struct Data(String);
 
+#[cfg(feature = "serde")]
 impl Data {
     /// Parses the data in the format specified by ICS-721.
     pub fn parse_as_ics721_data(&self) -> Result<Ics721Data, NftTransferError> {
@@ -46,6 +49,7 @@ impl FromStr for Data {
     }
 }
 
+#[cfg(feature = "serde")]
 impl serde::Serialize for Data {
     fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
     where
@@ -55,6 +59,7 @@ impl serde::Serialize for Data {
     }
 }
 
+#[cfg(feature = "serde")]
 impl<'de> serde::Deserialize<'de> for Data {
     fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
     where
@@ -86,6 +91,7 @@ impl<'de> serde::Deserialize<'de> for Data {
 #[derive(Clone, Debug, Default, PartialEq, Eq)]
 pub struct Ics721Data(BTreeMap<String, DataValue>);
 
+#[cfg(feature = "serde")]
 impl FromStr for Ics721Data {
     type Err = NftTransferError;
 
diff --git a/ibc-apps/ics721-nft-transfer/types/src/lib.rs b/ibc-apps/ics721-nft-transfer/types/src/lib.rs
index 8ca548269..7a55e1368 100644
--- a/ibc-apps/ics721-nft-transfer/types/src/lib.rs
+++ b/ibc-apps/ics721-nft-transfer/types/src/lib.rs
@@ -17,28 +17,19 @@
 #[cfg(any(test, feature = "std"))]
 extern crate std;
 
-#[cfg(feature = "serde")]
 mod class;
-#[cfg(feature = "serde")]
-pub use class::*;
-#[cfg(feature = "serde")]
 mod data;
-#[cfg(feature = "serde")]
-pub use data::*;
-#[cfg(feature = "serde")]
+mod memo;
+mod token;
+
 pub mod events;
-#[cfg(feature = "serde")]
 pub mod msgs;
-#[cfg(feature = "serde")]
+pub use class::*;
+pub use data::*;
 pub mod packet;
-#[cfg(feature = "serde")]
-mod token;
-#[cfg(feature = "serde")]
+pub use memo::*;
 pub use token::*;
-
 pub mod error;
-mod memo;
-pub use memo::*;
 
 /// Re-exports ICS-721 NFT transfer proto types from the `ibc-proto` crate.
 pub mod proto {
diff --git a/ibc-apps/ics721-nft-transfer/types/src/packet.rs b/ibc-apps/ics721-nft-transfer/types/src/packet.rs
index 90120935a..efa8e6264 100644
--- a/ibc-apps/ics721-nft-transfer/types/src/packet.rs
+++ b/ibc-apps/ics721-nft-transfer/types/src/packet.rs
@@ -17,7 +17,7 @@ use crate::token::{TokenData, TokenIds, TokenUri};
 
 /// Defines the structure of token transfers' packet bytes
 #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
-#[serde(rename_all = "camelCase")]
+#[cfg_attr(feature = "serde", serde(rename_all = "camelCase"))]
 #[cfg_attr(feature = "schema", derive(schemars::JsonSchema))]
 #[cfg_attr(
     feature = "parity-scale-codec",