diff --git a/oxrlib/errors.py b/oxrlib/errors.py
index 242d553f7a65a4dd3f87133c609607f2c09aef7f..37c59c8081a4050b0af1d0f0f99a1fa98d5254df 100644
--- a/oxrlib/errors.py
+++ b/oxrlib/errors.py
@@ -1,5 +1,9 @@
+class CacheError(Exception): pass
+class CacheConfigurationError(CacheError): pass
 class LoaderError(Exception): pass
+class LoaderConfigurationError(LoaderError): pass
 class LoaderNoDataError(LoaderError): pass
 class LoaderBadRequestError(LoaderError): pass
 class LoaderSourceError(LoaderError): pass
+class CacheLoaderConfigurationError(CacheConfigurationError, LoaderConfigurationError): pass
 class NoLoadersError(Exception): pass