diff --git a/lib/amocrm/internal/util.rb b/lib/amocrm/internal/util.rb
index 3756406..f1b28cb 100644
--- a/lib/amocrm/internal/util.rb
+++ b/lib/amocrm/internal/util.rb
@@ -485,7 +485,7 @@ def writable_enum(&blk)
       end
 
       # @type [Regexp]
-      JSON_CONTENT = %r{^application/(?:vnd(?:\.[^.]+)*\+)?json(?!l)}
+      JSON_CONTENT = %r{^application/(?:[a-z0-9.-]+\+)?json(?!l)}
       # @type [Regexp]
       JSONL_CONTENT = %r{^application/(:?x-(?:n|l)djson)|(:?(?:x-)?jsonl)}
 
diff --git a/test/amocrm/internal/util_test.rb b/test/amocrm/internal/util_test.rb
index 41a6971..cfbfbd6 100644
--- a/test/amocrm/internal/util_test.rb
+++ b/test/amocrm/internal/util_test.rb
@@ -171,6 +171,7 @@ def test_json_content
     cases = {
       "application/json" => true,
       "application/jsonl" => false,
+      "application/hal+json" => true,
       "application/vnd.github.v3+json" => true,
       "application/vnd.api+json" => true
     }