diff --git a/src/yamlfmt/devcontainer-feature.json b/src/yamlfmt/devcontainer-feature.json
index f232f6e..f3a0f41 100644
--- a/src/yamlfmt/devcontainer-feature.json
+++ b/src/yamlfmt/devcontainer-feature.json
@@ -7,7 +7,7 @@
     "version": {
       "type": "string",
       "proposals": ["v0.14.0", "v0.16.0"],
-      "default": "v0.20.0",
+      "default": "v0.21.0",
       "description": "Select or enter yamlfmt version to install."
     }
   },
diff --git a/test/yamlfmt/test.sh b/test/yamlfmt/test.sh
index 21d1134..5d37685 100644
--- a/test/yamlfmt/test.sh
+++ b/test/yamlfmt/test.sh
@@ -26,7 +26,7 @@ source dev-container-features-test-lib
 
 # Feature-specific tests
 # The 'check' command comes from the dev-container-features-test-lib.
-check "version" yamlfmt -version | grep '0.20.0'
+check "version" yamlfmt -version | grep '0.21.0'
 
 # Report result
 # If any of the checks above exited with a non-zero exit code, the test will fail.