diff --git a/lib/src/main/java/net/monarchpass/piecannon/impl/WebDavServer.java b/lib/src/main/java/net/monarchpass/piecannon/impl/WebDavServer.java
index d43dbcd..55aa1c1 100644
--- a/lib/src/main/java/net/monarchpass/piecannon/impl/WebDavServer.java
+++ b/lib/src/main/java/net/monarchpass/piecannon/impl/WebDavServer.java
@@ -6,6 +6,7 @@ import java.net.URI;
 import com.google.common.io.ByteSource;
 
 import jodd.http.HttpRequest;
+import jodd.http.HttpResponse;
 import lombok.Data;
 import net.monarchpass.piecannon.Server;
 
@@ -28,7 +29,11 @@ public class WebDavServer implements Server {
                 request.basicAuthentication(username, password);
             }
             
-            request.send();
+            final HttpResponse response = request.send();
+            if (response.statusCode() >= 400) {
+                throw new RuntimeException(response.statusCode() + ": " + response.statusPhrase());
+            }
+            
             return target;        
         } catch (final IOException exception) {
             throw new RuntimeException(exception);