diff --git a/CHANGELOG.md b/CHANGELOG.md
index 57ca2ae..91ade9a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,9 +7,10 @@ Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## Unreleased
 
+## [0.5.0] - 2021-10-18
+
 ### Added
 - Added --metrics option to change output into something Sensu agent can register as tagged metrics
-- Added --metrics-format option to make tagged metrics format selectable
 - Added --tags option to make it possible to add additional tags for all metrics
 - Added --human-readable option to support ignoring human-readable option like df unix/linux command
 
diff --git a/README.md b/README.md
index 9c61268..130ade3 100644
--- a/README.md
+++ b/README.md
@@ -47,7 +47,6 @@ Flags:
   -f, --fail-on-error             Fail and exit on errors getting file system usage (e.g. permission denied) (default false)
   -H, --human-readable            print sizes in powers of 1024 (default false)
       --metrics                   Output metrics instead of human readable output
-      --metrics-format string     Metrics output format, supports opentsdb_line or prometheus_text (default "opentsdb_line")
       --tags strings              Comma separated list of additional metrics tags using key=value format.
   -h, --help                      help for check-disk-usage
 
@@ -82,7 +81,6 @@ continue to check the remaining file systems as expected.
 * The `--human-readable` (False by default) option determines if you prefer
 to display sizes of different drives in a human format. (Like df Unix/linux
 command.)
-* The `--metrics` (False by default) option will change text output to conform to selected metrics format (`--metrics-format`)
 
 ## Configuration