diff --git a/lib/resources/registry_key.rb b/lib/resources/registry_key.rb
index 1b71ffcaa..6ba1b7207 100644
--- a/lib/resources/registry_key.rb
+++ b/lib/resources/registry_key.rb
@@ -23,37 +23,36 @@ class RegistryKey < Inspec.resource(1)
   end
 
   def exists?
-    !registry_value(@reg_key).nil?
+    !registry_key(@reg_key).nil?
   end
 
   def has_value?(value)
-    val = registry_value(@reg_key)
-    !val.nil? && val['(default)'.to_s]['value'] == value ? true : false
+    val = registry_key(@reg_key)
+    !val.nil? && registry_property_value(val, '(default)') == value ? true : false
   end
 
   def has_property?(property_name, property_type = nil)
-    val = registry_value(@reg_key)
-    !val.nil? && !val[property_name.to_s].nil? && (property_type.nil? || val[property_name.to_s]['type'] == map2type(property_type)) ? true : false
+    val = registry_key(@reg_key)
+    !val.nil? && registry_property_exists(val, property_name) && (property_type.nil? || registry_property_type(val, property_name) == map2type(property_type)) ? true : false
   end
 
   # deactivate rubocop, because we need to stay compatible with Serverspe
   # rubocop:disable Style/OptionalArguments
   def has_property_value?(property_name, property_type = nil, value)
     # rubocop:enable Style/OptionalArguments
-    val = registry_value(@reg_key)
+    val = registry_key(@reg_key)
 
     # convert value to binary if required
     value = value.bytes if !property_type.nil? && map2type(property_type) == 3 && !value.is_a?(Array)
 
-    !val.nil? && val[property_name.to_s]['value'] == value && (property_type.nil? || val[property_name.to_s]['type'] == map2type(property_type)) ? true : false
+    !val.nil? && registry_property_value(val, property_name) == value && (property_type.nil? || registry_property_type(val, property_name) == map2type(property_type)) ? true : false
   end
 
   # returns nil, if not existant or value
   def method_missing(meth)
     # get data
-    val = registry_value(@reg_key)
-    return nil if val.nil?
-    val[meth.to_s]['value']
+    val = registry_key(@reg_key)
+    registry_property_value(val, meth)
   end
 
   def to_s
@@ -62,7 +61,25 @@ class RegistryKey < Inspec.resource(1)
 
   private
 
-  def registry_value(path)
+  def registry_property_exists(regkey, property)
+    return false if regkey.nil? || property.nil?
+    # always ensure the key is lower case
+    !regkey[property.to_s.downcase].nil?
+  end
+
+  def registry_property_value(regkey, property)
+    return nil if regkey.nil? || property.nil?
+    # always ensure the key is lower case
+    regkey[property.to_s.downcase]['value']
+  end
+
+  def registry_property_type(regkey, property)
+    return nil if regkey.nil? || property.nil?
+    # always ensure the key is lower case
+    regkey[property.to_s.downcase]['type']
+  end
+
+  def registry_key(path)
     return @registy_cache if defined?(@registy_cache)
 
     # load registry key and all properties
@@ -87,6 +104,10 @@ class RegistryKey < Inspec.resource(1)
     # return nil if cmd.exit_status != 0, try to parse json
     begin
       @registy_cache = JSON.parse(cmd.stdout)
+      # convert keys to lower case
+      @registy_cache = Hash[@registy_cache.map do |key, value|
+        [key.downcase, value]
+      end]
     rescue JSON::ParserError => _e
       @registy_cache = nil
     end
diff --git a/test/integration/cookbooks/os_prepare/recipes/registry_key.rb b/test/integration/cookbooks/os_prepare/recipes/registry_key.rb
index ee10d9e0f..17c4de852 100644
--- a/test/integration/cookbooks/os_prepare/recipes/registry_key.rb
+++ b/test/integration/cookbooks/os_prepare/recipes/registry_key.rb
@@ -66,4 +66,9 @@ if node['platform_family'] == 'windows'
     action :create
   end
 
+  registry_key 'HKLM\System\CurrentControlSet\Control\Lsa\MSV1_0' do
+    values [{ name: 'NTLMMinServerSec', type: :dword, data: 537_395_200 }]
+    recursive true
+    action :create
+  end
 end
diff --git a/test/integration/test/integration/default/registry_key_spec.rb b/test/integration/test/integration/default/registry_key_spec.rb
index 484331b0a..8ca789926 100644
--- a/test/integration/test/integration/default/registry_key_spec.rb
+++ b/test/integration/test/integration/default/registry_key_spec.rb
@@ -6,11 +6,16 @@ if os.windows?
     it { should exist }
     it { should have_value('test') }
     it { should have_property('binary value', :binary) }
+    it { should have_property('Binary value', :binary) }
     it { should have_property('string value') }
+    it { should have_property('String value') }
     it { should have_property('dword value', :dword) }
     it { should have_property_value('multistring value', :multi_string, ['test', 'multi','string','data']) }
+    it { should have_property_value('Multistring Value', :multi_string, ['test', 'multi','string','data']) }
     it { should have_property_value('qword value', :qword, 0) }
+    it { should have_property_value('Qword value', :qword, 0) }
     it { should have_property_value('binary value', :binary, 'dfa0f066') }
+    it { should have_property_value('Binary value', :binary, 'dfa0f066') }
   end
 
   # serverspec compatability
@@ -33,6 +38,8 @@ if os.windows?
   describe registry_key('HKLM\System\CurrentControlSet\Control\Session Manager') do
     it { should exist }
     it { should_not have_property_value('SafeDllSearchMode', :type_dword, 0) }
+    # case-insensitive test
+    it { should_not have_property_value('safedllsearchmode', :type_dword, 0) }
   end
 
   describe registry_key('HKLM\System\CurrentControlSet\Services\LanManServer\Parameters') do
@@ -43,6 +50,8 @@ if os.windows?
   describe registry_key('HKLM\Software\Policies\Microsoft\Internet Explorer\Main') do
     it { should exist }
     its('Isolation64Bit') { should eq 1 }
+    # check that its is case-insensitive
+    its('isolation64bit') { should eq 1 }
   end
 
   describe registry_key('HKLM\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services') do
@@ -50,4 +59,9 @@ if os.windows?
     its('MinEncryptionLevel') { should eq 3 }
   end
 
+  describe registry_key('HKLM\System\CurrentControlSet\Control\Lsa\MSV1_0') do
+    it { should exist }
+    its('NTLMMinServerSec') { should eq 537_395_200 }
+    its('NtlmMinServerSec') { should eq 537_395_200 }
+  end
 end