diff --git a/auditlog/encoder.py b/auditlog/encoder.py
new file mode 100644
index 0000000..43c32b1
--- /dev/null
+++ b/auditlog/encoder.py
@@ -0,0 +1,16 @@
+from django.core.serializers.json import DjangoJSONEncoder
+
+from decimal import Decimal
+
+AUDITLOG_BUGGY_REPR_DATATYPES = (Decimal,)
+
+
+class AuditLogChangesJSONEncoder(DjangoJSONEncoder):
+    def default(self, obj):
+        if isinstance(obj, list) and obj:
+            return [
+                str(o) if isinstance(o, AUDITLOG_BUGGY_REPR_DATATYPES) else o
+                for o in obj
+            ]
+
+        return super().default(obj)
diff --git a/auditlog/models.py b/auditlog/models.py
index c28cb1b..4f2069c 100644
--- a/auditlog/models.py
+++ b/auditlog/models.py
@@ -24,6 +24,7 @@ from django.utils.encoding import smart_str
 from django.utils.translation import gettext_lazy as _
 
 from auditlog.diff import mask_str
+from auditlog.encoder import AuditLogChangesJSONEncoder
 
 DEFAULT_OBJECT_REPR = "<error forming object repr>"
 
@@ -350,7 +351,7 @@ class LogEntry(models.Model):
         choices=Action.choices, verbose_name=_("action"), db_index=True
     )
     changes_text = models.TextField(blank=True, verbose_name=_("change message"))
-    changes = models.JSONField(null=True, verbose_name=_("change message"))
+    changes = models.JSONField(null=True, verbose_name=_("change message"), encoder=AuditLogChangesJSONEncoder)
     actor = models.ForeignKey(
         to=settings.AUTH_USER_MODEL,
         on_delete=models.SET_NULL,