diff --git a/Steepfile b/Steepfile
index 0b72b08..561ad7e 100644
--- a/Steepfile
+++ b/Steepfile
@@ -1,8 +1,15 @@
 # frozen_string_literal: true
 
+D = Steep::Diagnostic
+
 target :lib do
   signature 'sig'
 
   check 'lib'
   repo_path '.gem_rbs_collection'
+
+  configure_code_diagnostics do |hash|
+    hash[D::Ruby::MethodDefinitionMissing] = :warning
+    hash[D::Ruby::UnknownConstant] = :information
+  end
 end
diff --git a/rbs_collection.lock.yaml b/rbs_collection.lock.yaml
index d667b75..f34fb59 100644
--- a/rbs_collection.lock.yaml
+++ b/rbs_collection.lock.yaml
@@ -1,9 +1,4 @@
 ---
-sources:
-- name: ruby/gem_rbs_collection
-  remote: https://github.com/ruby/gem_rbs_collection.git
-  revision: main
-  repo_dir: gems
 path: ".gem_rbs_collection"
 gems:
 - name: activesupport
@@ -22,6 +17,14 @@ gems:
     revision: c42c09528dd99252db98f0744181a6de54ec2f55
     remote: https://github.com/ruby/gem_rbs_collection.git
     repo_dir: gems
+- name: base64
+  version: '0'
+  source:
+    type: stdlib
+- name: bigdecimal
+  version: '0'
+  source:
+    type: stdlib
 - name: concurrent-ruby
   version: '1.1'
   source:
@@ -30,7 +33,15 @@ gems:
     revision: c42c09528dd99252db98f0744181a6de54ec2f55
     remote: https://github.com/ruby/gem_rbs_collection.git
     repo_dir: gems
-- name: csv
+- name: connection_pool
+  version: '2.4'
+  source:
+    type: git
+    name: ruby/gem_rbs_collection
+    revision: 846c09971455f0e144cef2f5a6c9fe6d8905d3e1
+    remote: https://github.com/ruby/gem_rbs_collection.git
+    repo_dir: gems
+- name: date
   version: '0'
   source:
     type: stdlib
@@ -46,6 +57,10 @@ gems:
   version: '0'
   source:
     type: stdlib
+- name: forwardable
+  version: '0'
+  source:
+    type: stdlib
 - name: i18n
   version: '1.10'
   source:
@@ -58,14 +73,6 @@ gems:
   version: '0'
   source:
     type: stdlib
-- name: listen
-  version: '3.2'
-  source:
-    type: git
-    name: ruby/gem_rbs_collection
-    revision: c42c09528dd99252db98f0744181a6de54ec2f55
-    remote: https://github.com/ruby/gem_rbs_collection.git
-    repo_dir: gems
 - name: logger
   version: '0'
   source:
@@ -74,6 +81,22 @@ gems:
   version: '0'
   source:
     type: stdlib
+- name: monitor
+  version: '0'
+  source:
+    type: stdlib
+- name: mutex_m
+  version: '0'
+  source:
+    type: stdlib
+- name: net-http
+  version: '0'
+  source:
+    type: stdlib
+- name: net-protocol
+  version: '0'
+  source:
+    type: stdlib
 - name: parallel
   version: '1.20'
   source:
@@ -82,6 +105,14 @@ gems:
     revision: c42c09528dd99252db98f0744181a6de54ec2f55
     remote: https://github.com/ruby/gem_rbs_collection.git
     repo_dir: gems
+- name: parser
+  version: '3.2'
+  source:
+    type: git
+    name: ruby/gem_rbs_collection
+    revision: 846c09971455f0e144cef2f5a6c9fe6d8905d3e1
+    remote: https://github.com/ruby/gem_rbs_collection.git
+    repo_dir: gems
 - name: rainbow
   version: '3.0'
   source:
@@ -90,30 +121,38 @@ gems:
     revision: c42c09528dd99252db98f0744181a6de54ec2f55
     remote: https://github.com/ruby/gem_rbs_collection.git
     repo_dir: gems
-- name: securerandom
-  version: '0'
+- name: rake
+  version: '13.0'
   source:
-    type: stdlib
-- name: steep
-  version: 1.3.0
-  source:
-    type: rubygems
-- name: strscan
-  version: '0'
-  source:
-    type: stdlib
-- name: date
-  version: '0'
+    type: git
+    name: ruby/gem_rbs_collection
+    revision: 846c09971455f0e144cef2f5a6c9fe6d8905d3e1
+    remote: https://github.com/ruby/gem_rbs_collection.git
+    repo_dir: gems
+- name: regexp_parser
+  version: '2.8'
   source:
-    type: stdlib
-- name: monitor
-  version: '0'
+    type: git
+    name: ruby/gem_rbs_collection
+    revision: 846c09971455f0e144cef2f5a6c9fe6d8905d3e1
+    remote: https://github.com/ruby/gem_rbs_collection.git
+    repo_dir: gems
+- name: rubocop
+  version: '1.57'
   source:
-    type: stdlib
-- name: mutex_m
-  version: '0'
+    type: git
+    name: ruby/gem_rbs_collection
+    revision: 846c09971455f0e144cef2f5a6c9fe6d8905d3e1
+    remote: https://github.com/ruby/gem_rbs_collection.git
+    repo_dir: gems
+- name: rubocop-ast
+  version: '1.30'
   source:
-    type: stdlib
+    type: git
+    name: ruby/gem_rbs_collection
+    revision: 846c09971455f0e144cef2f5a6c9fe6d8905d3e1
+    remote: https://github.com/ruby/gem_rbs_collection.git
+    repo_dir: gems
 - name: singleton
   version: '0'
   source:
@@ -122,7 +161,7 @@ gems:
   version: '0'
   source:
     type: stdlib
-- name: forwardable
+- name: timeout
   version: '0'
   source:
     type: stdlib
diff --git a/rbs_collection.yaml b/rbs_collection.yaml
index a7b853f..d258b80 100644
--- a/rbs_collection.yaml
+++ b/rbs_collection.yaml
@@ -13,3 +13,5 @@ gems:
   # It's unnecessary if you don't use rbs as a library.
   - name: rbs
     ignore: true
+  - name: steep
+    ignore: true
diff --git a/sig/ika3/concerns/utils.rbs b/sig/ika3/concerns/utils.rbs
index 500876d..2b2a747 100644
--- a/sig/ika3/concerns/utils.rbs
+++ b/sig/ika3/concerns/utils.rbs
@@ -1,7 +1,7 @@
 module Ika3
   module Concerns
     module Utils
-      def self?.load_yaml_file: (file: String) -> Object
+      def self?.load_yaml_file: (String) -> Object
     end
   end
 end
diff --git a/sig/ika3/schedule.rbs b/sig/ika3/schedule.rbs
index 33d708c..aabe45a 100644
--- a/sig/ika3/schedule.rbs
+++ b/sig/ika3/schedule.rbs
@@ -1,14 +1,14 @@
 class Hash[unchecked out K, unchecked out V] < Object
-  def method_missing: (name: String) -> untyped
+  def method_missing: (Symbol) -> untyped
 end
 
 module Ika3
   class Schedule
-    def initialize: (contact: String) -> void
+    def initialize: (String) -> void
 
     private
 
-    def send_request: (method: String, path: String) -> Object
+    def send_request: (Symbol, String) -> Object
 
     def api_url: () -> "https://spla3.yuu26.com/"
 
diff --git a/sig/ika3/weapon.rbs b/sig/ika3/weapon.rbs
index 8f7dcf2..a7f525b 100644
--- a/sig/ika3/weapon.rbs
+++ b/sig/ika3/weapon.rbs
@@ -4,21 +4,21 @@ module Ika3
 
     include Ika3::Concerns::Utils
 
-    def self.find: (untyped weapon_key) -> untyped
+    def self.find: (String) -> (Exception | Object)
 
-    def self.find_by_name: (untyped weapon_name) -> untyped
+    def self.find_by_name: (String) -> (Exception | Object)
 
-    def self.filter_by_sub: (untyped sub_name) -> untyped
+    def self.filter_by_sub: (String) -> (Exception | Object)
 
-    def self.reload_config!: () -> untyped
+    def self.reload_config!: () -> void
 
     private
 
     def self.names: () -> Array[Symbol]
 
-    def self.weapons: () -> Array[Object]
+    def self.weapons: () -> Hash[Symbol, String]
 
-    def self.sub_weapons: () -> Array[Object]
+    def self.sub_weapons: () -> Hash[Symbol, String]
 
     def self.config: () -> untyped