diff --git a/src/pkcs1v15/signature.rs b/src/pkcs1v15/signature.rs
index 4a69512..0d274d5 100644
--- a/src/pkcs1v15/signature.rs
+++ b/src/pkcs1v15/signature.rs
@@ -36,7 +36,7 @@ impl TryFrom<&[u8]> for Signature {
     fn try_from(bytes: &[u8]) -> signature::Result<Self> {
         let len = bytes.len();
         let inner = BoxedUint::from_be_slice(bytes, len as u32 * 8)
-            .map_err(|e| Box::new(e) as Box<dyn std::error::Error + Send + Sync + 'static>)?;
+            .map_err(|e| Box::new(e) as Box<dyn core::error::Error + Send + Sync + 'static>)?;
 
         Ok(Self { inner })
     }
diff --git a/src/pss/signature.rs b/src/pss/signature.rs
index 665e8d9..5e986cd 100644
--- a/src/pss/signature.rs
+++ b/src/pss/signature.rs
@@ -36,7 +36,7 @@ impl TryFrom<&[u8]> for Signature {
     fn try_from(bytes: &[u8]) -> signature::Result<Self> {
         let len = bytes.len();
         let inner = BoxedUint::from_be_slice(bytes, len as u32 * 8)
-            .map_err(|e| Box::new(e) as Box<dyn std::error::Error + Send + Sync + 'static>)?;
+            .map_err(|e| Box::new(e) as Box<dyn core::error::Error + Send + Sync + 'static>)?;
 
         Ok(Self { inner })
     }