diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3fbcc5c4e..3c8d4b025 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,19 @@
 Moto Changelog
 ==============
 
+4.0.0
+-----
+Docker Digest for 4.0.0: <autopopulateddigest>
+
+    General:
+        * Introduces MultiAccount support (see http://docs.getmoto.org/en/latest/docs/multi_account.html)
+        * Removes deprecated decorators mock_dynamodb2 and mock_rds2
+        * The API for the TreadedMotoServer is now considered stable
+
+    Dependencies:
+        * The responses-module now has a minimum version of 0.13.0
+
+
 3.1.18
 -----
 Docker Digest for 3.1.18: _sha256:52fa7fdf8deee66d47fa760fafce1231ec9007d7bfc9c7a3080a8badd372b300_
diff --git a/IMPLEMENTATION_COVERAGE.md b/IMPLEMENTATION_COVERAGE.md
index 8c6c0045d..b1a53f753 100644
--- a/IMPLEMENTATION_COVERAGE.md
+++ b/IMPLEMENTATION_COVERAGE.md
@@ -713,7 +713,7 @@
 
 ## cloudwatch
 <details>
-<summary>38% implemented</summary>
+<summary>36% implemented</summary>
 
 - [X] delete_alarms
 - [ ] delete_anomaly_detector
@@ -736,6 +736,7 @@
 - [ ] get_metric_stream
 - [ ] get_metric_widget_image
 - [X] list_dashboards
+- [ ] list_managed_insight_rules
 - [ ] list_metric_streams
 - [X] list_metrics
 - [X] list_tags_for_resource
@@ -743,6 +744,7 @@
 - [ ] put_composite_alarm
 - [X] put_dashboard
 - [ ] put_insight_rule
+- [ ] put_managed_insight_rules
 - [X] put_metric_alarm
 - [X] put_metric_data
 - [ ] put_metric_stream
@@ -1459,7 +1461,7 @@
 
 ## dynamodb
 <details>
-<summary>58% implemented</summary>
+<summary>54% implemented</summary>
 
 - [ ] batch_execute_statement
 - [X] batch_get_item
@@ -1477,6 +1479,7 @@
 - [ ] describe_export
 - [ ] describe_global_table
 - [ ] describe_global_table_settings
+- [ ] describe_import
 - [ ] describe_kinesis_streaming_destination
 - [ ] describe_limits
 - [X] describe_table
@@ -1488,10 +1491,12 @@
 - [ ] execute_transaction
 - [ ] export_table_to_point_in_time
 - [X] get_item
+- [ ] import_table
 - [X] list_backups
 - [ ] list_contributor_insights
 - [ ] list_exports
 - [ ] list_global_tables
+- [ ] list_imports
 - [X] list_tables
 - [X] list_tags_of_resource
 - [X] put_item
@@ -2577,7 +2582,7 @@
 - [ ] list_job_runs
 - [ ] list_tags_for_resource
 - [X] start_application
-- [X] start_job_run
+- [ ] start_job_run
 - [X] stop_application
 - [ ] tag_resource
 - [ ] untag_resource
@@ -4779,6 +4784,7 @@
 <summary>6% implemented</summary>
 
 - [ ] compare_faces
+- [ ] copy_project_version
 - [ ] create_collection
 - [ ] create_dataset
 - [ ] create_project
@@ -4788,6 +4794,7 @@
 - [ ] delete_dataset
 - [ ] delete_faces
 - [ ] delete_project
+- [ ] delete_project_policy
 - [ ] delete_project_version
 - [ ] delete_stream_processor
 - [ ] describe_collection
@@ -4816,8 +4823,10 @@
 - [ ] list_dataset_entries
 - [ ] list_dataset_labels
 - [ ] list_faces
+- [ ] list_project_policies
 - [ ] list_stream_processors
 - [ ] list_tags_for_resource
+- [ ] put_project_policy
 - [ ] recognize_celebrities
 - [ ] search_faces
 - [ ] search_faces_by_image
diff --git a/docs/docs/services/cloudwatch.rst b/docs/docs/services/cloudwatch.rst
index e9ec5491e..0f44583e3 100644
--- a/docs/docs/services/cloudwatch.rst
+++ b/docs/docs/services/cloudwatch.rst
@@ -46,6 +46,7 @@ cloudwatch
 - [ ] get_metric_stream
 - [ ] get_metric_widget_image
 - [X] list_dashboards
+- [ ] list_managed_insight_rules
 - [ ] list_metric_streams
 - [X] list_metrics
 - [X] list_tags_for_resource
@@ -53,6 +54,7 @@ cloudwatch
 - [ ] put_composite_alarm
 - [X] put_dashboard
 - [ ] put_insight_rule
+- [ ] put_managed_insight_rules
 - [X] put_metric_alarm
 - [X] put_metric_data
 - [ ] put_metric_stream
diff --git a/docs/docs/services/dynamodb.rst b/docs/docs/services/dynamodb.rst
index bcb1a19f6..be78bb51e 100644
--- a/docs/docs/services/dynamodb.rst
+++ b/docs/docs/services/dynamodb.rst
@@ -41,6 +41,7 @@ dynamodb
 - [ ] describe_export
 - [ ] describe_global_table
 - [ ] describe_global_table_settings
+- [ ] describe_import
 - [ ] describe_kinesis_streaming_destination
 - [ ] describe_limits
 - [X] describe_table
@@ -52,10 +53,12 @@ dynamodb
 - [ ] execute_transaction
 - [ ] export_table_to_point_in_time
 - [X] get_item
+- [ ] import_table
 - [X] list_backups
 - [ ] list_contributor_insights
 - [ ] list_exports
 - [ ] list_global_tables
+- [ ] list_imports
 - [X] list_tables
 - [X] list_tags_of_resource
 - [X] put_item
diff --git a/docs/docs/services/rekognition.rst b/docs/docs/services/rekognition.rst
index f38bdf7bf..c46f5d42e 100644
--- a/docs/docs/services/rekognition.rst
+++ b/docs/docs/services/rekognition.rst
@@ -28,6 +28,7 @@ rekognition
 |start-h3| Implemented features for this service |end-h3|
 
 - [ ] compare_faces
+- [ ] copy_project_version
 - [ ] create_collection
 - [ ] create_dataset
 - [ ] create_project
@@ -37,6 +38,7 @@ rekognition
 - [ ] delete_dataset
 - [ ] delete_faces
 - [ ] delete_project
+- [ ] delete_project_policy
 - [ ] delete_project_version
 - [ ] delete_stream_processor
 - [ ] describe_collection
@@ -73,8 +75,10 @@ rekognition
 - [ ] list_dataset_entries
 - [ ] list_dataset_labels
 - [ ] list_faces
+- [ ] list_project_policies
 - [ ] list_stream_processors
 - [ ] list_tags_for_resource
+- [ ] put_project_policy
 - [ ] recognize_celebrities
 - [ ] search_faces
 - [ ] search_faces_by_image
diff --git a/docs/docs/services/sts.rst b/docs/docs/services/sts.rst
index d4d787fb8..b4596bf33 100644
--- a/docs/docs/services/sts.rst
+++ b/docs/docs/services/sts.rst
@@ -26,6 +26,10 @@ sts
 |start-h3| Implemented features for this service |end-h3|
 
 - [X] assume_role
+  
+        Assume an IAM Role. Note that the role does not need to exist. The ARN can point to another account, providing an opportunity to switch accounts.
+        
+
 - [X] assume_role_with_saml
 - [X] assume_role_with_web_identity
 - [ ] decode_authorization_message