diff --git a/CHANGELOG.md b/CHANGELOG.md
index b8998536..eb59db2f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@ The format is based on [Keep a Changelog], and this project adheres to
 # Unreleased
 
 - **changed**: Updated `tower` from `0.4` to `0.5`.
+- **added**: Support reading PKCS\#1 and SEC1 private keys with Rustls.
 
 # 0.7.1 (31. July 2024)
 
diff --git a/src/tls_rustls/mod.rs b/src/tls_rustls/mod.rs
index fabb983c..ab7e5fd1 100644
--- a/src/tls_rustls/mod.rs
+++ b/src/tls_rustls/mod.rs
@@ -338,9 +338,9 @@ async fn config_from_pem_chain_file(
     let key_cert: PrivateKeyDer = match rustls_pemfile::read_one(&mut key.as_ref())?
         .ok_or_else(|| io_other("could not parse pem file"))?
     {
-        Item::Pkcs8Key(key) => {
-            Ok(PrivateKeyDer::try_from(key.secret_pkcs8_der().to_vec()).map_err(io_other)?)
-        }
+        Item::Pkcs8Key(key) => Ok(key.into()),
+        Item::Sec1Key(key) => Ok(key.into()),
+        Item::Pkcs1Key(key) => Ok(key.into()),
         x => Err(io_other(format!(
             "invalid certificate format, received: {x:?}"
         ))),