diff --git a/Gemfile b/Gemfile
index f804fd1..1c89ce0 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,5 +9,5 @@ gem "rake", "~> 13.2"
 
 gem "minitest", "~> 5.25"
 
-gem "steep", "~> 1.8.3", require: false
+gem "steep", "~> 1.9.0", require: false
 gem "strscan"
diff --git a/Gemfile.lock b/Gemfile.lock
index da57fbb..512f6c3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,9 +1,9 @@
 PATH
   remote: .
   specs:
-    rbs-inline (0.11.0)
+    rbs-inline (0.11.1)
       prism (>= 0.29, < 1.3)
-      rbs (>= 3.5.0)
+      rbs (>= 3.8.0)
 
 GEM
   remote: https://rubygems.org/
@@ -51,10 +51,10 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.11.1)
       ffi (~> 1.0)
-    rbs (3.6.1)
+    rbs (3.9.4)
       logger
     securerandom (0.4.1)
-    steep (1.8.3)
+    steep (1.9.4)
       activesupport (>= 5.1)
       concurrent-ruby (>= 1.1.10)
       csv (>= 3.0.9)
@@ -65,16 +65,18 @@ GEM
       logger (>= 1.3.0)
       parser (>= 3.1)
       rainbow (>= 2.2.2, < 4.0)
-      rbs (~> 3.6.0)
+      rbs (~> 3.8)
       securerandom (>= 0.1)
       strscan (>= 1.0.0)
       terminal-table (>= 2, < 4)
+      uri (>= 0.12.0)
     strscan (3.1.2)
     terminal-table (3.0.2)
       unicode-display_width (>= 1.1.1, < 3)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
     unicode-display_width (2.6.0)
+    uri (1.0.3)
 
 PLATFORMS
   arm64-darwin-22
@@ -88,7 +90,7 @@ DEPENDENCIES
   minitest (~> 5.25)
   rake (~> 13.2)
   rbs-inline!
-  steep (~> 1.8.3)
+  steep (~> 1.9.0)
   strscan
 
 BUNDLED WITH
diff --git a/lib/rbs/inline/ast/annotations.rb b/lib/rbs/inline/ast/annotations.rb
index 9d7ca8c..6506e5a 100644
--- a/lib/rbs/inline/ast/annotations.rb
+++ b/lib/rbs/inline/ast/annotations.rb
@@ -494,7 +494,7 @@ def initialize(tree, source)
                       end
                     end
 
-                    typename = TypeName(token_strs.join)
+                    typename = TypeName.parse(token_strs.join)
                     @clauses << RBS::AST::Directives::Use::SingleClause.new(
                       type_name: typename,
                       new_name: new_name,
diff --git a/lib/rbs/inline/ast/declarations.rb b/lib/rbs/inline/ast/declarations.rb
index fe658b27..8cd02cd 100644
--- a/lib/rbs/inline/ast/declarations.rb
+++ b/lib/rbs/inline/ast/declarations.rb
@@ -10,7 +10,7 @@ module ConstantUtil
           def type_name(node)
             case node
             when Prism::ConstantReadNode, Prism::ConstantPathNode
-              TypeName(node.full_name)
+              TypeName.parse(node.full_name)
             end
           end
 
diff --git a/lib/rbs/inline/node_utils.rb b/lib/rbs/inline/node_utils.rb
index ef50721..fb8fb10 100644
--- a/lib/rbs/inline/node_utils.rb
+++ b/lib/rbs/inline/node_utils.rb
@@ -8,7 +8,7 @@ module NodeUtils
       def type_name(node)
         case node
         when Prism::ConstantReadNode
-          TypeName(node.name.to_s)
+          TypeName.parse(node.name.to_s)
         end
       end
     end
diff --git a/lib/rbs/inline/version.rb b/lib/rbs/inline/version.rb
index 12edf97..910b740 100644
--- a/lib/rbs/inline/version.rb
+++ b/lib/rbs/inline/version.rb
@@ -2,6 +2,6 @@
 
 module RBS
   module Inline
-    VERSION = "0.11.0"
+    VERSION = "0.11.1"
   end
 end
diff --git a/lib/rbs/inline/writer.rb b/lib/rbs/inline/writer.rb
index 8f63c8c..bc01d96 100644
--- a/lib/rbs/inline/writer.rb
+++ b/lib/rbs/inline/writer.rb
@@ -267,7 +267,7 @@ def translate_data_assign_decl(decl, rbs) #: void
         members = [:singleton, :instance].map do |kind|
           RBS::AST::Members::MethodDefinition.new(
             name: :members,
-            kind: kind, #: RBS::AST::MethodDefinition::Kind
+            kind: kind, #: RBS::AST::Members::MethodDefinition::kind
             overloads: [
               RBS::AST::Members::MethodDefinition::Overload.new(
                 method_type: RBS::MethodType.new(
diff --git a/rbs-inline.gemspec b/rbs-inline.gemspec
index e3f9fb4..d75b67b 100644
--- a/rbs-inline.gemspec
+++ b/rbs-inline.gemspec
@@ -29,5 +29,5 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
 
   spec.add_dependency "prism", ">= 0.29", "< 1.3"
-  spec.add_dependency "rbs", ">= 3.5.0"
+  spec.add_dependency "rbs", ">= 3.8.0"
 end
diff --git a/rbs_collection.lock.yaml b/rbs_collection.lock.yaml
index 5d6ff29..92df680 100644
--- a/rbs_collection.lock.yaml
+++ b/rbs_collection.lock.yaml
@@ -14,17 +14,17 @@ gems:
   source:
     type: stdlib
 - name: minitest
-  version: '0'
+  version: '5.25'
   source:
-    type: stdlib
+    type: git
+    name: ruby/gem_rbs_collection
+    revision: 43b158b1fc209960643ca6baf5f883b186997e8d
+    remote: https://github.com/ruby/gem_rbs_collection.git
+    repo_dir: gems
 - name: monitor
   version: '0'
   source:
     type: stdlib
-- name: mutex_m
-  version: '0'
-  source:
-    type: stdlib
 - name: optparse
   version: '0'
   source:
@@ -42,11 +42,11 @@ gems:
   source:
     type: git
     name: ruby/gem_rbs_collection
-    revision: 218cf130d31f63e110e350efc3fa265311b0f238
+    revision: 43b158b1fc209960643ca6baf5f883b186997e8d
     remote: https://github.com/ruby/gem_rbs_collection.git
     repo_dir: gems
 - name: rbs
-  version: 3.6.1
+  version: 3.9.4
   source:
     type: rubygems
 - name: rdoc
diff --git a/test/rbs/inline/annotation_parser_test.rb b/test/rbs/inline/annotation_parser_test.rb
index 33998f6..60a47b7 100644
--- a/test/rbs/inline/annotation_parser_test.rb
+++ b/test/rbs/inline/annotation_parser_test.rb
@@ -3,6 +3,7 @@
 require "test_helper"
 
 class RBS::Inline::AnnotationParserTest < Minitest::Test
+  include RBS
   include RBS::Inline
 
   def parse_comments(src)
@@ -289,11 +290,11 @@ def test_inherits
       RUBY
 
     annots[0].annotations[0].tap do |annotation|
-      assert_equal TypeName("Object"), annotation.super_name
+      assert_equal TypeName.parse("Object"), annotation.super_name
       assert_equal [], annotation.args.map(&:to_s)
     end
     annots[0].annotations[1].tap do |annotation|
-      assert_equal TypeName("Array"), annotation.super_name
+      assert_equal TypeName.parse("Array"), annotation.super_name
       assert_equal ["String"], annotation.args.map(&:to_s)
     end
     annots[0].annotations[2].tap do |annotation|
@@ -338,7 +339,7 @@ def test_use
       assert_instance_of AST::Annotations::Use, annotation
 
       annotation.clauses[0].tap do |clause|
-        assert_equal TypeName("::Foo"), clause.type_name
+        assert_equal TypeName.parse("::Foo"), clause.type_name
         assert_nil clause.new_name
       end
     end
@@ -346,7 +347,7 @@ def test_use
       assert_instance_of AST::Annotations::Use, annotation
 
       annotation.clauses[0].tap do |clause|
-        assert_equal TypeName("Foo"), clause.type_name
+        assert_equal TypeName.parse("Foo"), clause.type_name
         assert_nil clause.new_name
       end
     end
@@ -354,7 +355,7 @@ def test_use
       assert_instance_of AST::Annotations::Use, annotation
 
       annotation.clauses[0].tap do |clause|
-        assert_equal TypeName("Foo::Bar"), clause.type_name
+        assert_equal TypeName.parse("Foo::Bar"), clause.type_name
         assert_nil clause.new_name
       end
     end
@@ -362,7 +363,7 @@ def test_use
       assert_instance_of AST::Annotations::Use, annotation
 
       annotation.clauses[0].tap do |clause|
-        assert_equal TypeName("Foo::bar"), clause.type_name
+        assert_equal TypeName.parse("Foo::bar"), clause.type_name
         assert_nil clause.new_name
       end
     end
@@ -370,7 +371,7 @@ def test_use
       assert_instance_of AST::Annotations::Use, annotation
 
       annotation.clauses[0].tap do |clause|
-        assert_equal TypeName("Foo::_Bar"), clause.type_name
+        assert_equal TypeName.parse("Foo::_Bar"), clause.type_name
         assert_nil clause.new_name
       end
     end
@@ -385,15 +386,15 @@ def test_use
       assert_instance_of AST::Annotations::Use, annotation
 
       annotation.clauses[0].tap do |clause|
-        assert_equal TypeName("Foo::Bar"), clause.type_name
+        assert_equal TypeName.parse("Foo::Bar"), clause.type_name
         assert_equal :Bar2, clause.new_name
       end
       annotation.clauses[1].tap do |clause|
-        assert_equal TypeName("Foo::bar"), clause.type_name
+        assert_equal TypeName.parse("Foo::bar"), clause.type_name
         assert_equal :bar2, clause.new_name
       end
       annotation.clauses[2].tap do |clause|
-        assert_equal TypeName("Foo::_Bar"), clause.type_name
+        assert_equal TypeName.parse("Foo::_Bar"), clause.type_name
         assert_equal :_Bar2, clause.new_name
       end
     end
@@ -663,29 +664,29 @@ def test_module_decl_annotation
 
     annots[0].annotations[0].tap do |annotation|
       assert_instance_of AST::Annotations::ModuleDecl, annotation
-      assert_equal TypeName("Foo"), annotation.name
+      assert_equal TypeName.parse("Foo"), annotation.name
       assert_empty annotation.type_params
       assert_empty annotation.self_types
     end
     annots[0].annotations[1].tap do |annotation|
       assert_instance_of AST::Annotations::ModuleDecl, annotation
-      assert_equal TypeName("::Foo::Bar"), annotation.name
+      assert_equal TypeName.parse("::Foo::Bar"), annotation.name
       assert_empty annotation.type_params
       assert_empty annotation.self_types
     end
     annots[0].annotations[2].tap do |annotation|
       assert_instance_of AST::Annotations::ModuleDecl, annotation
-      assert_equal TypeName("Foo"), annotation.name
+      assert_equal TypeName.parse("Foo"), annotation.name
       annotation.type_params[0].tap do |param|
         assert_equal :A, param.name
         assert_equal "Integer", param.upper_bound.to_s
       end
       annotation.self_types[0].tap do |self_type|
-        assert_equal TypeName("BasicObject"), self_type.name
+        assert_equal TypeName.parse("BasicObject"), self_type.name
         assert_empty self_type.args
       end
       annotation.self_types[1].tap do |self_type|
-        assert_equal TypeName("_Each"), self_type.name
+        assert_equal TypeName.parse("_Each"), self_type.name
         assert_equal ["String"], self_type.args.map(&:to_s)
       end
     end
@@ -705,18 +706,18 @@ def test_class_decl_annotation
 
     annots[0].annotations[0].tap do |annotation|
       assert_instance_of AST::Annotations::ClassDecl, annotation
-      assert_equal TypeName("Foo"), annotation.name
+      assert_equal TypeName.parse("Foo"), annotation.name
       assert_empty annotation.type_params
       assert_nil annotation.super_class
     end
     annots[0].annotations[1].tap do |annotation|
       assert_instance_of AST::Annotations::ClassDecl, annotation
-      assert_equal TypeName("Foo"), annotation.name
+      assert_equal TypeName.parse("Foo"), annotation.name
       annotation.type_params[0].tap do |param|
         assert_equal :A, param.name
         assert_equal "Integer", param.upper_bound.to_s
       end
-      assert_equal TypeName("Array"), annotation.super_class.name
+      assert_equal TypeName.parse("Array"), annotation.super_class.name
       assert_equal ["A"], annotation.super_class.args.map(&:to_s)
     end
   end
diff --git a/test/rbs/inline/constant_util_test.rb b/test/rbs/inline/constant_util_test.rb
index cb47fde..ab27bec 100644
--- a/test/rbs/inline/constant_util_test.rb
+++ b/test/rbs/inline/constant_util_test.rb
@@ -3,6 +3,7 @@
 require "test_helper"
 
 class RBS::Inline::AST::Declarations::ConstantUtilTest < Minitest::Test
+  include RBS
   include RBS::Inline
 
   def parse_ruby(src)
@@ -12,14 +13,14 @@ def parse_ruby(src)
   include RBS::Inline::AST::Declarations::ConstantUtil
 
   def test_read_constant_node
-    assert_equal TypeName("Foo"), type_name(parse_ruby("Foo"))
+    assert_equal TypeName.parse("Foo"), type_name(parse_ruby("Foo"))
   end
 
   def test_read_constant_path_node
-    assert_equal TypeName("Foo::Bar"), type_name(parse_ruby("Foo::Bar"))
+    assert_equal TypeName.parse("Foo::Bar"), type_name(parse_ruby("Foo::Bar"))
   end
 
   def test_read_constant_path_node_root
-    assert_equal TypeName("::Foo::Bar"), type_name(parse_ruby("::Foo::Bar"))
+    assert_equal TypeName.parse("::Foo::Bar"), type_name(parse_ruby("::Foo::Bar"))
   end
 end
diff --git a/test/rbs/inline/declarations_test.rb b/test/rbs/inline/declarations_test.rb
index 6e9817e..b965df9 100644
--- a/test/rbs/inline/declarations_test.rb
+++ b/test/rbs/inline/declarations_test.rb
@@ -3,6 +3,7 @@
 require "test_helper"
 
 class RBS::Inline::AST::DeclarationsTest < Minitest::Test
+  include RBS
   include RBS::Inline
 
   def parse_ruby(src)
@@ -17,7 +18,7 @@ class Hello
 
     decl = AST::Declarations::ClassDecl.new(result.value.statements.body[0], nil, nil)
 
-    assert_equal TypeName("Hello"), decl.class_name
+    assert_equal TypeName.parse("Hello"), decl.class_name
   end
 
   def test_class_decl__super
@@ -28,6 +29,6 @@ class Hello < Object
 
     decl = AST::Declarations::ClassDecl.new(result.value.statements.body[0], nil, nil)
 
-    assert_equal TypeName("Hello"), decl.class_name
+    assert_equal TypeName.parse("Hello"), decl.class_name
   end
 end