diff --git a/Gemfile b/Gemfile
index 7dbe8668..46ea3ec5 100644
--- a/Gemfile
+++ b/Gemfile
@@ -19,9 +19,6 @@ gem 'open_uri_redirections', '0.2.1'
 gem 'test-kitchen',    '~> 2.4'
 gem 'kitchen-vagrant', '~> 1.6'
 
-# b/310663890: Temporarily pin unf_ext to avoid compilation errors.
-gem 'unf_ext', '0.0.8.2'
-
 group :test do
   gem 'rake', '~> 13.0.6'
   gem 'serverspec', '~> 2.18.0'
diff --git a/plugin_gems.rb b/plugin_gems.rb
index 9c6bce6f..924694e8 100644
--- a/plugin_gems.rb
+++ b/plugin_gems.rb
@@ -26,8 +26,6 @@
 download "fluent-plugin-multi-format-parser", "1.0.0"
 download "fluent-plugin-record-reformer", "0.9.1"
 download "fluent-plugin-record-modifier", "2.0.1"
-# b/310663890: Temporarily pin unf_ext to avoid compilation errors.
-download "unf_ext", "0.0.8.2"
 download "fluent-plugin-kubernetes_metadata_filter", "2.5.2"
 download "systemd-journal", "1.4.2"
 download "fluent-plugin-systemd", "1.0.5"