diff --git a/src/main/java/de/stklcode/jvault/connector/HTTPVaultConnector.java b/src/main/java/de/stklcode/jvault/connector/HTTPVaultConnector.java
index fa7176c..af3038a 100644
--- a/src/main/java/de/stklcode/jvault/connector/HTTPVaultConnector.java
+++ b/src/main/java/de/stklcode/jvault/connector/HTTPVaultConnector.java
@@ -849,7 +849,7 @@ public class HTTPVaultConnector implements VaultConnector {
                                 if (!er.getErrors().isEmpty() && er.getErrors().get(0).equals("permission denied"))
                                     throw new PermissionDeniedException();
                                 throw new InvalidResponseException(Error.RESPONSE_CODE,
-                                        response.getStatusLine().getStatusCode(), er.getErrors().get(0));
+                                        response.getStatusLine().getStatusCode(), er.toString());
                             } catch (IOException ignored) {
                                 // Exception ignored.
                             }
diff --git a/src/main/java/de/stklcode/jvault/connector/model/response/ErrorResponse.java b/src/main/java/de/stklcode/jvault/connector/model/response/ErrorResponse.java
index 5612f9c..ed0f766 100644
--- a/src/main/java/de/stklcode/jvault/connector/model/response/ErrorResponse.java
+++ b/src/main/java/de/stklcode/jvault/connector/model/response/ErrorResponse.java
@@ -38,4 +38,13 @@ public final class ErrorResponse implements VaultResponse {
     public List<String> getErrors() {
         return errors;
     }
+
+    @Override
+    public String toString() {
+        if (errors == null || errors.isEmpty()) {
+            return "error response";
+        } else {
+            return errors.get(0);
+        }
+    }
 }