diff --git a/src/wallet/address_validator.rs b/src/wallet/address_validator.rs
index 1a76feb9..cb4087aa 100644
--- a/src/wallet/address_validator.rs
+++ b/src/wallet/address_validator.rs
@@ -106,7 +106,7 @@ impl std::error::Error for AddressValidatorError {}
 /// validator will be propagated up to the original caller that triggered the address generation.
 ///
 /// For a usage example see [this module](crate::address_validator)'s documentation.
-pub trait AddressValidator {
+pub trait AddressValidator: Send + Sync {
     /// Validate or inspect an address
     fn validate(
         &self,
diff --git a/src/wallet/signer.rs b/src/wallet/signer.rs
index f0392a80..24f08aef 100644
--- a/src/wallet/signer.rs
+++ b/src/wallet/signer.rs
@@ -162,7 +162,7 @@ impl std::error::Error for SignerError {}
 ///
 /// This trait can be implemented to provide customized signers to the wallet. For an example see
 /// [`this module`](crate::wallet::signer)'s documentation.
-pub trait Signer: fmt::Debug {
+pub trait Signer: fmt::Debug + Send + Sync {
     /// Sign a PSBT
     ///
     /// The `input_index` argument is only provided if the wallet doesn't declare to sign the whole