diff --git a/.repo/nvchecker.toml b/.repo/nvchecker.toml
index ccac76e..f4277da 100644
--- a/.repo/nvchecker.toml
+++ b/.repo/nvchecker.toml
@@ -724,6 +724,42 @@ use_max_tag = true
 
 # gems
 
+[ruby-tty-platform]
+source = "gems"
+gems = "tty-platform"
+
+[ruby-slow_enumerator_tools]
+source = "gems"
+gems = "slow_enumerator_tools"
+
+[ruby-parallel]
+source = "gems"
+gems = "parallel"
+
+[ruby-json_schema]
+source = "gems"
+gems = "json_schema"
+
+[ruby-hamster]
+source = "gems"
+gems = "hamster"
+
+[ruby-ref]
+source = "gems"
+gems = "ref"
+
+[ruby-ddplugin]
+source = "gems"
+gems = "ddplugin"
+
+[ruby-ddmemoize]
+source = "gems"
+gems = "ddmemoize"
+
+[ruby-ddmetrics]
+source = "gems"
+gems = "ddmetrics"
+
 [ruby-mdl]
 source = "gems"
 gems = "mdl"