diff --git a/src/http/module.rs b/src/http/module.rs
index fbe9e11..5ba9b1c 100644
--- a/src/http/module.rs
+++ b/src/http/module.rs
@@ -12,7 +12,8 @@ pub enum MergeConfigError {
     NoValue,
 }
 
-impl core::error::Error for MergeConfigError {}
+#[cfg(feature = "std")]
+impl std::error::Error for MergeConfigError {}
 
 impl core::fmt::Display for MergeConfigError {
     fn fmt(&self, fmt: &mut core::fmt::Formatter) -> core::fmt::Result {
diff --git a/src/http/request.rs b/src/http/request.rs
index eb74edb..1ddfb24 100644
--- a/src/http/request.rs
+++ b/src/http/request.rs
@@ -1,4 +1,3 @@
-use core::error::Error;
 use core::ffi::c_void;
 use core::fmt;
 use core::marker::PhantomData;
@@ -718,7 +717,8 @@ impl fmt::Display for InvalidMethod {
     }
 }
 
-impl Error for InvalidMethod {}
+#[cfg(feature = "std")]
+impl std::error::Error for InvalidMethod {}
 
 #[derive(Clone, PartialEq, Eq, Hash)]
 enum MethodInner {
diff --git a/src/http/status.rs b/src/http/status.rs
index b067a93..ec77a92 100644
--- a/src/http/status.rs
+++ b/src/http/status.rs
@@ -1,4 +1,3 @@
-use core::error::Error;
 use core::fmt;
 
 use crate::core::Status;
@@ -29,7 +28,8 @@ impl fmt::Display for InvalidHTTPStatusCode {
     }
 }
 
-impl Error for InvalidHTTPStatusCode {}
+#[cfg(feature = "std")]
+impl std::error::Error for InvalidHTTPStatusCode {}
 
 impl From<HTTPStatus> for Status {
     fn from(val: HTTPStatus) -> Self {