diff --git a/ChangeLog.md b/ChangeLog.md
index d36617de9ca..93452151280 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,14 @@
 # Change Log
 
+### 2020-09-17 - 5.3.3
+Autorest core version: 3.0.6318
+
+Modelerfour version: 4.15.419
+
+**Bug fixes**
+
+- Fix trailing comma issues in metadata.json (unblocks resource multiapi generation)  #777
+
 ### 2020-09-14 - 5.3.2
 Autorest core version: 3.0.6318
 
diff --git a/autorest/codegen/templates/metadata.json.jinja2 b/autorest/codegen/templates/metadata.json.jinja2
index 37322018bdb..c6cab5c0b82 100644
--- a/autorest/codegen/templates/metadata.json.jinja2
+++ b/autorest/codegen/templates/metadata.json.jinja2
@@ -36,10 +36,8 @@
             {% endfor %}
         },
         "constant": {
-            {% for gp in code_model.global_parameters.constant %}
-            {% if gp.serialized_name != "api_version" %}
+            {% for gp in code_model.global_parameters.constant | rejectattr("serialized_name", "equalto", "api_version") %}
             {{ gp.serialized_name | tojson }}: {{ gp.constant_declaration | tojson }}{{ "," if not loop.last else "" }}
-            {% endif %}
             {% endfor %}
         },
         "call": {{ code_model.global_parameters.method | map(attribute="serialized_name") | join(', ') | tojson }}
@@ -52,10 +50,8 @@
         "credential_key_header_name": {{ code_model.options['credential_key_header_name'] | tojson }}
     },
     "operation_groups": {
-        {% for operation_group in code_model.operation_groups %}
-            {% if not operation_group.is_empty_operation_group %}
+        {% for operation_group in code_model.operation_groups | rejectattr('is_empty_operation_group') %}
         {{ operation_group.name | tojson }}: {{ operation_group.class_name | tojson }}{{ "," if not loop.last else "" }}
-            {% endif %}
         {% endfor %}
     },
     "operation_mixins": {
diff --git a/package.json b/package.json
index 254d1d68985..79372b358c8 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@autorest/python",
-  "version": "5.3.2",
+  "version": "5.3.3",
   "description": "The Python extension for generators in AutoRest.",
   "scripts": {
     "prepare": "node run-python3.js prepare.py",