diff --git a/pkgs/development/tools/jsduck/Gemfile.lock b/pkgs/development/tools/jsduck/Gemfile.lock
index d3e1556a7b39..2a95d72c9465 100644
--- a/pkgs/development/tools/jsduck/Gemfile.lock
+++ b/pkgs/development/tools/jsduck/Gemfile.lock
@@ -8,7 +8,7 @@ GEM
       parallel (~> 0.7.1)
       rdiscount (~> 2.1.6)
       rkelly-remix (~> 0.0.4)
-    json (1.8.3)
+    json (1.8.6)
     parallel (0.7.1)
     rdiscount (2.1.8)
     rkelly-remix (0.0.7)
diff --git a/pkgs/development/tools/jsduck/gemset.nix b/pkgs/development/tools/jsduck/gemset.nix
index d80bd70dd728..493cc42f4f4e 100644
--- a/pkgs/development/tools/jsduck/gemset.nix
+++ b/pkgs/development/tools/jsduck/gemset.nix
@@ -19,10 +19,10 @@
   json = {
     source = {
       remotes = ["https://rubygems.org"];
-      sha256 = "1nsby6ry8l9xg3yw4adlhk2pnc7i0h0rznvcss4vk3v74qg0k8lc";
+      sha256 = "0qmj7fypgb9vag723w1a49qihxrcf5shzars106ynw2zk352gbv5";
       type = "gem";
     };
-    version = "1.8.3";
+    version = "1.8.6";
   };
   parallel = {
     source = {
@@ -48,4 +48,4 @@
     };
     version = "0.0.7";
   };
-}
\ No newline at end of file
+}