diff --git a/lib/rspec_api_documentation/curl.rb b/lib/rspec_api_documentation/curl.rb
index 4e6bc174..257f0883 100644
--- a/lib/rspec_api_documentation/curl.rb
+++ b/lib/rspec_api_documentation/curl.rb
@@ -76,7 +76,7 @@ def format_full_header(header, value)
     def filter_headers(headers)
       if !@config_headers_to_filer.empty?
         headers.reject do |header|
-          @config_headers_to_filer.include?(format_header(header))
+          @config_headers_to_filer.map(&:downcase).include?(format_header(header).downcase)
         end
       else
         headers
diff --git a/lib/rspec_api_documentation/example.rb b/lib/rspec_api_documentation/example.rb
index 73264b43..a488c34a 100644
--- a/lib/rspec_api_documentation/example.rb
+++ b/lib/rspec_api_documentation/example.rb
@@ -63,7 +63,7 @@ def remap_headers(requests, key, headers_to_include)
       requests.each.with_index do |request_hash, index|
         next unless request_hash.key?(key)
         headers = request_hash[key]
-        request_hash[key] = headers.select{ |key, _| headers_to_include.include?(key) }
+        request_hash[key] = headers.select{ |key, _| headers_to_include.map(&:downcase).include?(key.downcase) }
         requests[index] = request_hash
       end
     end
diff --git a/spec/example_spec.rb b/spec/example_spec.rb
index cef44e93..eecdf48c 100644
--- a/spec/example_spec.rb
+++ b/spec/example_spec.rb
@@ -193,7 +193,7 @@
           },
           {
               :request_headers => {
-                  "Included" => "data",
+                  "included" => "data",
                   "Other" => "not seen"
               },
               :request_method => "GET"
@@ -211,7 +211,7 @@
           },
           {
               :request_headers => {
-                  "Included" => "data",
+                  "included" => "data",
               },
               :request_method => "GET"
           }
@@ -232,7 +232,7 @@
           },
           {
               :response_headers => {
-                  "Included" => "data",
+                  "included" => "data",
                   "Other" => "not seen"
               },
               :request_method => "GET"
@@ -250,7 +250,7 @@
           },
           {
               :response_headers => {
-                  "Included" => "data",
+                  "included" => "data",
               },
               :request_method => "GET"
           }