diff --git a/CHANGELOG.md b/CHANGELOG.md
index de56cf59..b14b04de 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,21 @@
 # Changelog
 
+## 4.4.0
+
+* Use ``dict`` and ``set`` in pynamo models rather than ``{}`` and ``set()``,
+  to avoid potential corrupted data in model saves. Based on how confidant
+  currently uses the pynamo models, the default arguments can't lead to data
+  corruption, but to avoid potential future issues, we're fixing the default
+  args to not be mutable.
+
+## 4.3.1
+
+* Packaging fix
+
+## 4.3.0
+
+* Case insentive sort for service and credential list API responses
+
 ## 4.2.0
 
 * Don't in-memory cache the USERS\_FILE, but re-read it every time, so that
diff --git a/confidant/models/blind_credential.py b/confidant/models/blind_credential.py
index cac8e951..1296722c 100644
--- a/confidant/models/blind_credential.py
+++ b/confidant/models/blind_credential.py
@@ -42,12 +42,12 @@ class Meta:
     data_type_date_index = DataTypeDateIndex()
     name = UnicodeAttribute()
     credential_pairs = JSONAttribute()
-    credential_keys = NonNullUnicodeSetAttribute(default=set([]), null=True)
+    credential_keys = NonNullUnicodeSetAttribute(default=set, null=True)
     enabled = BooleanAttribute(default=True)
     data_key = JSONAttribute()
     cipher_version = NumberAttribute()
     cipher_type = UnicodeAttribute()
-    metadata = JSONAttribute(default={}, null=True)
+    metadata = JSONAttribute(default=dict, null=True)
     modified_date = UTCDateTimeAttribute(default=datetime.now)
     modified_by = UnicodeAttribute()
     documentation = UnicodeAttribute(null=True)
diff --git a/confidant/models/credential.py b/confidant/models/credential.py
index bdf38b2d..6ae3fb70 100644
--- a/confidant/models/credential.py
+++ b/confidant/models/credential.py
@@ -44,7 +44,7 @@ class Meta:
     data_key = BinaryAttribute()
     # TODO: add cipher_type
     cipher_version = NumberAttribute(null=True)
-    metadata = JSONAttribute(default={}, null=True)
+    metadata = JSONAttribute(default=dict, null=True)
     modified_date = UTCDateTimeAttribute(default=datetime.now)
     modified_by = UnicodeAttribute()
     documentation = UnicodeAttribute(null=True)
diff --git a/confidant/models/service.py b/confidant/models/service.py
index 704f0348..f45d176f 100644
--- a/confidant/models/service.py
+++ b/confidant/models/service.py
@@ -40,8 +40,8 @@ class Meta:
     data_type_date_index = DataTypeDateIndex()
     revision = NumberAttribute()
     enabled = BooleanAttribute(default=True)
-    credentials = NonNullUnicodeSetAttribute(default=set())
-    blind_credentials = NonNullUnicodeSetAttribute(default=set())
+    credentials = NonNullUnicodeSetAttribute(default=set)
+    blind_credentials = NonNullUnicodeSetAttribute(default=set)
     account = UnicodeAttribute(null=True)
     modified_date = UTCDateTimeAttribute(default=datetime.now)
     modified_by = UnicodeAttribute()
diff --git a/setup.py b/setup.py
index 500f2cab..53354a33 100644
--- a/setup.py
+++ b/setup.py
@@ -18,7 +18,7 @@
 
 setup(
     name="confidant",
-    version="4.3.1",
+    version="4.4.0",
     packages=find_packages(exclude=["test*"]),
     include_package_data=True,
     zip_safe=False,