diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9a6cf02c..d24f9ee3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@
   - For Rails applications, `suppress_required_validations` is automatically set to `true` if `SECRET_KEY_BASE_DUMMY` is defined.
   
 - Fix handling relative vs. absolute paths in `autoload_static_configs_path=`. ([@palkan][])
+- Fix support for array values in `except` option for required attributes. ([@dominikb][])
 
 ## 2.6.4 (2024-04-30)
 
diff --git a/lib/anyway/settings.rb b/lib/anyway/settings.rb
index 4fc3a240..2f4b6c33 100644
--- a/lib/anyway/settings.rb
+++ b/lib/anyway/settings.rb
@@ -89,7 +89,7 @@ def matching_env?(env)
 
         if env.is_a?(::Hash)
           envs = env[:except]
-          excluded_envs = [envs].flat_map(&:to_s)
+          excluded_envs = [*envs].flat_map(&:to_s)
           excluded_envs.none?(current_environment)
         elsif env.is_a?(::Array)
           env.flat_map(&:to_s).include?(current_environment)
diff --git a/spec/config_spec.rb b/spec/config_spec.rb
index fbe65269..fc456574 100644
--- a/spec/config_spec.rb
+++ b/spec/config_spec.rb
@@ -896,6 +896,16 @@ def self.name
         end
       end
 
+      context "when current env matches one of env options under except array" do
+        before { allow(Anyway::Settings).to receive(:current_environment).and_return("local") }
+
+        let(:missed_keys) { [:sentry_api_key] }
+
+        it "not raises ValidationError" do
+          expect { demo_config.new }.to_not raise_error
+        end
+      end
+
       context "when env value under except key mismatched" do
         before { allow(Anyway::Settings).to receive(:current_environment).and_return("demo") }