diff --git a/.gitmodules b/.gitmodules
index c05dcb1..c167cd7 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,6 +1,3 @@
 [submodule "submodules/surah-name-glyphs"]
 	path = submodules/surah-name-glyphs
 	url = https://github.com/ReflectsLight/surah-name-glyphs
-[submodule "packages/ruby/server.rb"]
-	path = packages/ruby/server.rb
-	url = https://github.com/0x1eef/server.rb
diff --git a/Gemfile b/Gemfile
index 8299183..ea0c930 100644
--- a/Gemfile
+++ b/Gemfile
@@ -15,7 +15,7 @@ gem "sass", "~> 3.7"
 
 ##
 # Web server
-gem "server.rb", path: "./packages/ruby/server.rb"
+gem "server.rb"
 
 ##
 # Other
diff --git a/Gemfile.lock b/Gemfile.lock
index 5d2d3a7..fedef0a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,10 +1,3 @@
-PATH
-  remote: packages/ruby/server.rb
-  specs:
-    server.rb (0.1.0)
-      puma (~> 6.3)
-      rack (~> 3.0)
-
 GEM
   remote: https://rubygems.org/
   specs:
@@ -124,6 +117,9 @@ GEM
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
+    server.rb (0.1.1)
+      puma (~> 6.3)
+      rack (~> 3.0)
     set (1.1.0)
     slow_enumerator_tools (1.1.0)
     sorted_set (1.0.3)
@@ -168,7 +164,7 @@ DEPENDENCIES
   rainpress (~> 1.0)
   ryo.rb
   sass (~> 3.7)
-  server.rb!
+  server.rb
   standard (~> 1.24)
   test-cmd.rb
 
diff --git a/bin/setup b/bin/setup
index dc7f9c0..1054103 100755
--- a/bin/setup
+++ b/bin/setup
@@ -2,6 +2,6 @@
 
 ##
 # main
+git submodule update -f --init --recursive
 bundle install
 npm i
-git submodule update --init --recursive
diff --git a/packages/ruby/.gitkeep b/packages/ruby/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/packages/ruby/server.rb b/packages/ruby/server.rb
deleted file mode 160000
index bf94e6f..0000000
--- a/packages/ruby/server.rb
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit bf94e6f20c1f48ec002611912a53e0bf746f076f