diff --git a/src/main/java/de/malkusch/km200/http/Http.java b/src/main/java/de/malkusch/km200/http/Http.java
index 6659b4f..11e3d8c 100644
--- a/src/main/java/de/malkusch/km200/http/Http.java
+++ b/src/main/java/de/malkusch/km200/http/Http.java
@@ -41,19 +41,15 @@ public final Response post(String path, byte[] body) throws KM200Exception, IOEx
     protected abstract Response exchange(Request request) throws IOException, InterruptedException, KM200Exception;
 
     static Response assertHttpOk(Request request, Response response) throws KM200Exception {
-        var status = response.status();
-        if (status >= 200 && status <= 299) {
-            return response;
-
-        } else {
-            throw switch (status) {
-            case 400 -> new KM200Exception.BadRequest(request + " was a bad request");
-            case 403 -> new KM200Exception.Forbidden(request + " is forbidden");
-            case 404 -> new KM200Exception.NotFound(request + " was not found");
-            case 423 -> new KM200Exception.Locked(request + " was locked");
-            case 500 -> new KM200Exception.ServerError(request + " resulted in a server error");
-            default -> new KM200Exception(request + " failed with response code " + status);
-            };
-        }
+        return switch ((Integer) response.status()) {
+        case Integer status when (status >= 200 && status <= 299) -> response;
+
+        case 400 -> throw new KM200Exception.BadRequest(request + " was a bad request");
+        case 403 -> throw new KM200Exception.Forbidden(request + " is forbidden");
+        case 404 -> throw new KM200Exception.NotFound(request + " was not found");
+        case 423 -> throw new KM200Exception.Locked(request + " was locked");
+        case 500 -> throw new KM200Exception.ServerError(request + " resulted in a server error");
+        default -> throw new KM200Exception(request + " failed with response code " + response.status());
+        };
     }
 }
diff --git a/src/main/java/de/malkusch/km200/http/RetryHttp.java b/src/main/java/de/malkusch/km200/http/RetryHttp.java
index 56c36f2..b95695f 100644
--- a/src/main/java/de/malkusch/km200/http/RetryHttp.java
+++ b/src/main/java/de/malkusch/km200/http/RetryHttp.java
@@ -38,7 +38,8 @@ public Response exchange(Request request) throws IOException, InterruptedExcepti
             case IOException cause -> throw cause;
             case InterruptedException cause -> throw cause;
             case KM200Exception cause -> throw cause;
-            default -> throw new KM200Exception("Unexpected retry error for " + request.path(), e);
+            case Throwable cause -> throw new KM200Exception("Unexpected retry error for " + request.path(), cause);
+            case null -> throw new KM200Exception("Unexpected retry error for " + request.path(), e);
             }
         }
     }
diff --git a/src/main/java/de/malkusch/km200/http/UrlHttp.java b/src/main/java/de/malkusch/km200/http/UrlHttp.java
index 65654d9..fe445fe 100644
--- a/src/main/java/de/malkusch/km200/http/UrlHttp.java
+++ b/src/main/java/de/malkusch/km200/http/UrlHttp.java
@@ -1,6 +1,7 @@
 package de.malkusch.km200.http;
 
 import java.io.IOException;
+import java.io.InputStream;
 import java.net.HttpURLConnection;
 import java.net.MalformedURLException;
 import java.net.SocketTimeoutException;
@@ -45,9 +46,11 @@ protected Response exchange(Request request) throws IOException, InterruptedExce
                 throw new IOException(request + " received invalid HTTP response");
             }
 
-            try (var input = connection.getErrorStream() != null ? connection.getErrorStream()
-                    : connection.getInputStream()) {
-
+            var input = switch (connection.getErrorStream()) {
+            case InputStream error -> error;
+            case null -> connection.getInputStream();
+            };
+            try (input) {
                 var body = input.readAllBytes();
                 var response = new Response(status, body);
                 return assertHttpOk(request, response);