diff --git a/src/contracts.rs b/src/contracts.rs
index 09549ae..3783b2c 100644
--- a/src/contracts.rs
+++ b/src/contracts.rs
@@ -8,6 +8,8 @@ use serde_derive::Deserialize;
     clippy::needless_update
 )]
 pub mod v2 {
+    use ethabi_contract::use_contract;
+
     use_contract!(key_mgr, "abi/v2/KeysManager.abi.json");
     use_contract!(val_meta, "abi/v2/ValidatorMetadata.abi.json");
     use_contract!(voting, "abi/v2/VotingToChangeKeys.abi.json");
@@ -17,6 +19,8 @@ pub mod v2 {
 // The `use_contract!` macro triggers several Clippy warnings.
 #[allow(clippy::redundant_closure, clippy::needless_update)]
 pub mod v1 {
+    use ethabi_contract::use_contract;
+
     use_contract!(voting, "abi/v1/VotingToChangeKeys.abi.json");
 }
 
diff --git a/src/error.rs b/src/error.rs
index 714b432..995a07a 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -1,3 +1,7 @@
+use error_chain::{
+    error_chain, error_chain_processing, impl_error_chain_kind, impl_error_chain_processed,
+    impl_extract_backtrace,
+};
 use ethabi;
 use web3;
 
diff --git a/src/main.rs b/src/main.rs
index 6d02714..de8ba73 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,7 +1,3 @@
-#[macro_use]
-extern crate error_chain;
-#[macro_use(use_contract)]
-extern crate ethabi_contract;
 #[macro_use(EthabiContract)]
 extern crate ethabi_derive;