diff --git a/modules/cloudwatch-metrics/USAGE.md b/modules/cloudwatch-metrics/USAGE.md
index fcb32f1..1e0ab01 100644
--- a/modules/cloudwatch-metrics/USAGE.md
+++ b/modules/cloudwatch-metrics/USAGE.md
@@ -43,7 +43,7 @@
 | <a name="input_name"></a> [name](#input\_name) | A unique name for this CloudWatch Metric Stream. | `string` | `"honeycomb-cloudwatch-metrics"` | no |
 | <a name="input_namespace_exclude_filters"></a> [namespace\_exclude\_filters](#input\_namespace\_exclude\_filters) | DEPRECATED: use `include_filters` instead.<br><br>An optional list of CloudWatch Metric namespaces to exclude. If set, we'll only stream metrics that are not in these namespaces.<br>Mutually exclusive with `namespace_include_filters`. | `list(string)` | `[]` | no |
 | <a name="input_namespace_include_filters"></a> [namespace\_include\_filters](#input\_namespace\_include\_filters) | DEPRECATED: use `include_filters` instead.<br><br>An optional list of CloudWatch Metric namespaces to include. If set, we'll only stream metrics from these namespaces.<br>Mutually exclusive with `namespace_exclude_filters`. | `list(string)` | `[]` | no |
-| <a name="input_output_format"></a> [output\_format](#input\_output\_format) | Output format of metrics. You should probably not modify this value; the default format is supported, but others may not be. | `string` | `"opentelemetry0.7"` | no |
+| <a name="input_output_format"></a> [output\_format](#input\_output\_format) | Output format of metrics. You should probably not modify this value; the default format is supported, but others may not be. | `string` | `"opentelemetry1.0"` | no |
 | <a name="input_s3_backup_mode"></a> [s3\_backup\_mode](#input\_s3\_backup\_mode) | Should we only backup to S3 data that failed delivery, or all data? | `string` | `"FailedDataOnly"` | no |
 | <a name="input_s3_buffer_interval"></a> [s3\_buffer\_interval](#input\_s3\_buffer\_interval) | In seconds. See https://docs.aws.amazon.com/firehose/latest/dev/create-configure.html | `number` | `400` | no |
 | <a name="input_s3_buffer_size"></a> [s3\_buffer\_size](#input\_s3\_buffer\_size) | In MiB. See https://docs.aws.amazon.com/firehose/latest/dev/create-configure.html | `number` | `10` | no |
@@ -57,4 +57,4 @@
 |------|-------------|
 | <a name="output_cloudwatch_metric_stream_arn"></a> [cloudwatch\_metric\_stream\_arn](#output\_cloudwatch\_metric\_stream\_arn) | n/a |
 | <a name="output_cloudwatch_metric_stream_name"></a> [cloudwatch\_metric\_stream\_name](#output\_cloudwatch\_metric\_stream\_name) | n/a |
-<!-- END_TF_DOCS -->
\ No newline at end of file
+<!-- END_TF_DOCS -->
diff --git a/modules/cloudwatch-metrics/variables.tf b/modules/cloudwatch-metrics/variables.tf
index 44444a9..d39fc6e 100644
--- a/modules/cloudwatch-metrics/variables.tf
+++ b/modules/cloudwatch-metrics/variables.tf
@@ -144,11 +144,11 @@ variable "s3_backup_mode" {
 
 variable "output_format" {
   type        = string
-  default     = "opentelemetry0.7"
+  default     = "opentelemetry1.0"
   description = "Output format of metrics. You should probably not modify this value; the default format is supported, but others may not be."
 
   validation {
-    condition     = contains(["json", "opentelemetry0.7"], var.output_format)
+    condition     = contains(["json", "opentelemetry0.7", "opentelemetry1.0"], var.output_format)
     error_message = "Not an allowed output format."
   }
 }