diff --git a/pkgs/tools/typesetting/asciidoctor/Gemfile.lock b/pkgs/tools/typesetting/asciidoctor/Gemfile.lock
index 59e8fd06ef2df..4843da894229c 100644
--- a/pkgs/tools/typesetting/asciidoctor/Gemfile.lock
+++ b/pkgs/tools/typesetting/asciidoctor/Gemfile.lock
@@ -38,7 +38,7 @@ GEM
     htmlentities (4.3.4)
     i18n (1.1.0)
       concurrent-ruby (~> 1.0)
-    json (2.1.0)
+    json (2.6.3)
     mathematical (1.6.11)
       ruby-enum (~> 0.4)
     multi_json (1.13.1)