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-rw-r--r--synapse/util/frozenutils.py6
1 files changed, 3 insertions, 3 deletions
diff --git a/synapse/util/frozenutils.py b/synapse/util/frozenutils.py
index 7223af1a36..889caa2601 100644
--- a/synapse/util/frozenutils.py
+++ b/synapse/util/frozenutils.py
@@ -14,14 +14,14 @@
 import collections.abc
 from typing import Any
 
-from frozendict import frozendict
+from immutabledict import immutabledict
 
 
 def freeze(o: Any) -> Any:
     if isinstance(o, dict):
-        return frozendict({k: freeze(v) for k, v in o.items()})
+        return immutabledict({k: freeze(v) for k, v in o.items()})
 
-    if isinstance(o, frozendict):
+    if isinstance(o, immutabledict):
         return o
 
     if isinstance(o, (bytes, str)):