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-rw-r--r--heat/engine/template_files.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/heat/engine/template_files.py b/heat/engine/template_files.py
index 93e68b5e6..55a54e0d6 100644
--- a/heat/engine/template_files.py
+++ b/heat/engine/template_files.py
@@ -28,7 +28,7 @@ class ReadOnlyDict(dict):
raise ValueError("Attempted to write to internal TemplateFiles cache")
-class TemplateFiles(collections.Mapping):
+class TemplateFiles(collections.abc.Mapping):
def __init__(self, files):
self.files = None