diff --git a/os_collect_config/merger.py b/os_collect_config/merger.py
index f9e7479..e069893 100644
--- a/os_collect_config/merger.py
+++ b/os_collect_config/merger.py
@@ -42,4 +42,4 @@ def merged_list_from_content(final_content, deployment_keys, collector_name):
                     final_list.append((deployment['name'],
                                        deployment['config']))
     final_list.insert(0, (collector_name, final_content))
-    return final_list
\ No newline at end of file
+    return final_list
diff --git a/test-requirements.txt b/test-requirements.txt
index bb445cb..cdbf637 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,7 +1,7 @@
 # The order of packages is significant, because pip processes them in the order
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
-hacking<0.10,>=0.9.2
+hacking>=0.12.0,!=0.13.0,<0.14 # Apache-2.0
 
 coverage>=4.0 # Apache-2.0
 fixtures>=3.0.0 # Apache-2.0/BSD