diff --git a/acertmgr/authority/v1.py b/acertmgr/authority/v1.py
index d5a4766..921838f 100644
--- a/acertmgr/authority/v1.py
+++ b/acertmgr/authority/v1.py
@@ -175,6 +175,9 @@ class ACMEAuthority(AbstractACMEAuthority):
             for domain in reversed(domains):
                 try:
                     challenge_handlers[domain].destroy_challenge(domain, account_thumbprint, tokens[domain])
+                except (KeyboardInterrupt, SystemError, SystemExit):
+                    # Re-raise runtime/system exceptions
+                    raise
                 except:
                     pass
 
diff --git a/setup.py b/setup.py
index 61504f3..dc7ba1e 100644
--- a/setup.py
+++ b/setup.py
@@ -67,5 +67,5 @@ setup(
         ],
     },
     data_files=[('readme', ['README.md']),
-                ('config', ['docs/acertmgr.conf','docs/domain.conf'])]
+                ('config', ['docs/acertmgr.conf', 'docs/domain.conf'])]
 )