diff --git a/spec/ameba/base_spec.cr b/spec/ameba/base_spec.cr
index 508091b5..21ced084 100644
--- a/spec/ameba/base_spec.cr
+++ b/spec/ameba/base_spec.cr
@@ -25,7 +25,7 @@ module Ameba::Rule
       subject = DummyRule.new
 
       it "is enabled by default" do
-        subject.enabled.should be_true
+        subject.enabled?.should be_true
       end
 
       it "has a description property" do
diff --git a/spec/ameba/config_spec.cr b/spec/ameba/config_spec.cr
index 03bd26a6..d738310f 100644
--- a/spec/ameba/config_spec.cr
+++ b/spec/ameba/config_spec.cr
@@ -170,7 +170,7 @@ module Ameba
         name = DummyRule.rule_name
         config.update_rule name, enabled: false
         rule = config.rules.find!(&.name.== name)
-        rule.enabled.should be_false
+        rule.enabled?.should be_false
       end
 
       it "updates excluded property" do
@@ -189,7 +189,7 @@ module Ameba
         name = DummyRule.rule_name
         config.update_rules [name], enabled: false
         rule = config.rules.find!(&.name.== name)
-        rule.enabled.should be_false
+        rule.enabled?.should be_false
       end
 
       it "updates multiple rules by excluded property" do
@@ -204,7 +204,7 @@ module Ameba
         group = DummyRule.group_name
         config.update_rules [group], enabled: false
         rule = config.rules.find!(&.name.== DummyRule.rule_name)
-        rule.enabled.should be_false
+        rule.enabled?.should be_false
       end
 
       it "updates a group by excluded property" do
diff --git a/src/ameba/config.cr b/src/ameba/config.cr
index 8f5b52a4..515e4fd8 100644
--- a/src/ameba/config.cr
+++ b/src/ameba/config.cr
@@ -247,7 +247,7 @@ class Ameba::Config
 
       {% if properties["enabled".id] == nil %}
         @[YAML::Field(key: "Enabled")]
-        property enabled = true
+        property? enabled = true
       {% end %}
 
       {% if properties["severity".id] == nil %}
diff --git a/src/ameba/runner.cr b/src/ameba/runner.cr
index a987db12..2f8ee72b 100644
--- a/src/ameba/runner.cr
+++ b/src/ameba/runner.cr
@@ -62,7 +62,7 @@ module Ameba
       @sources = config.sources
       @formatter = config.formatter
       @severity = config.severity
-      @rules = config.rules.select(&.enabled).reject!(&.special?)
+      @rules = config.rules.select(&.enabled?).reject!(&.special?)
       @autocorrect = config.autocorrect?
 
       @unneeded_disable_directive_rule =
@@ -220,7 +220,7 @@ module Ameba
 
     private def check_unneeded_directives(source)
       return unless rule = @unneeded_disable_directive_rule
-      return unless rule.enabled
+      return unless rule.enabled?
 
       rule.test(source)
     end