diff --git a/pgdog/src/net/tls.rs b/pgdog/src/net/tls.rs
index ee5f0ecc3..4976ec52d 100644
--- a/pgdog/src/net/tls.rs
+++ b/pgdog/src/net/tls.rs
@@ -140,7 +140,29 @@ pub fn reload() -> Result<(), Error> {
 }
 
 fn build_acceptor(cert: &Path, key: &Path, client_ca: Option<&Path>) -> Result<TlsAcceptor, Error> {
-    let pem = CertificateDer::from_pem_file(cert)?;
+    // Read the whole PEM file so intermediate certificates in a chain are kept.
+    let certs = CertificateDer::pem_file_iter(cert)
+        .map_err(|e| {
+            Error::Io(std::io::Error::new(
+                std::io::ErrorKind::InvalidData,
+                format!("Failed to read TLS certificate file: {}", e),
+            ))
+        })?
+        .collect::<Result<Vec<_>, _>>()
+        .map_err(|e| {
+            Error::Io(std::io::Error::new(
+                std::io::ErrorKind::InvalidData,
+                format!("Failed to parse TLS certificates: {}", e),
+            ))
+        })?;
+
+    if certs.is_empty() {
+        return Err(Error::Io(std::io::Error::new(
+            std::io::ErrorKind::InvalidData,
+            "No valid certificates found in TLS certificate file",
+        )));
+    }
+
     let key = PrivateKeyDer::from_pem_file(key)?;
 
     let builder = rustls::ServerConfig::builder();
@@ -151,7 +173,7 @@ fn build_acceptor(cert: &Path, key: &Path, client_ca: Option<&Path>) -> Result<T
         }
         None => builder.with_no_client_auth(),
     }
-    .with_single_cert(vec![pem], key)?;
+    .with_single_cert(certs, key)?;
 
     ACCEPTOR_BUILD_COUNT.fetch_add(1, Ordering::SeqCst);
 
@@ -552,6 +574,29 @@ mod tests {
         crate::config::set(crate::config::ConfigAndUsers::default()).unwrap();
     }
 
+    #[test]
+    fn acceptor_loads_certificate_chain() {
+        crate::logger();
+
+        super::test_reset_acceptor();
+
+        let cert = PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("tests/tls/chain_cert.pem");
+        let key = PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("tests/tls/chain_key.pem");
+
+        let mut cfg = crate::config::ConfigAndUsers::default();
+        cfg.config.general.tls_certificate = Some(cert);
+        cfg.config.general.tls_private_key = Some(key);
+
+        crate::config::set(cfg).unwrap();
+        super::reload().expect("acceptor builds from a certificate chain");
+
+        super::acceptor().expect("acceptor installed");
+        assert_eq!(super::test_acceptor_build_count(), 1);
+
+        super::test_reset_acceptor();
+        crate::config::set(crate::config::ConfigAndUsers::default()).unwrap();
+    }
+
     #[tokio::test]
     async fn test_connector_with_verify_mode() {
         crate::logger();
diff --git a/pgdog/tests/tls/chain_cert.pem b/pgdog/tests/tls/chain_cert.pem
new file mode 100644
index 000000000..354c5e0d6
--- /dev/null
+++ b/pgdog/tests/tls/chain_cert.pem
@@ -0,0 +1,38 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/pgdog/tests/tls/chain_key.pem b/pgdog/tests/tls/chain_key.pem
new file mode 100644
index 000000000..fb5365ae3
--- /dev/null
+++ b/pgdog/tests/tls/chain_key.pem
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----