diff --git a/ruby-oj/PKGBUILD b/ruby-oj/PKGBUILD
index ae9825d..a9a3660 100644
--- a/ruby-oj/PKGBUILD
+++ b/ruby-oj/PKGBUILD
@@ -2,7 +2,7 @@
 
 _gemname=oj
 pkgname=ruby-$_gemname
-pkgver=3.13.5
+pkgver=3.13.6
 pkgrel=1
 pkgdesc='The fastest JSON parser and object serializer'
 arch=('x86_64')
@@ -13,7 +13,7 @@ makedepends=('ruby-rdoc')
 options=(!emptydirs)
 source=("https://rubygems.org/downloads/$_gemname-$pkgver.gem")
 noextract=("$_gemname-$pkgver.gem")
-b2sums=('ff150b944d2fba00ca28e85e4aff8786c2766979dd0c0f7b38273da3d66c263d00fa060000ec8c5cc4d7ba409eff7bd470b15a258c91ab5ab665095d2acee6c3')
+b2sums=('18d1ea3ee6ea8300f82fb86647b8658358b9a6e96775f0c9b81fdd4c1e387839fb41f2fe9c682b43c042ab061cafc4594053bc83eb3a30f6bf15d50297a26286')
 
 package() {
   local _gemdir="$(ruby -e'puts Gem.default_dir')"
@@ -21,6 +21,7 @@ package() {
   gem install \
     --verbose \
     --ignore-dependencies \
+    --no-document \
     --no-user-install \
     --install-dir "$pkgdir/$_gemdir" \
     --bindir "$pkgdir/usr/bin" \
@@ -37,9 +38,19 @@ package() {
 
   # move documentation
   install -vd "$pkgdir/usr/share/doc/$pkgname"
-  mv -v README.md pages "$pkgdir/usr/share/doc/$pkgname"
+  mv -v *.md pages "$pkgdir/usr/share/doc/$pkgname"
 
   # license
   install -vd "$pkgdir/usr/share/licenses/$pkgname"
   mv -v LICENSE "$pkgdir/usr/share/licenses/$pkgname"
+
+  # generate reproducible documentation
+  install -vd "$pkgdir/$_gemdir/doc/$_gemname-$pkgver"
+  cd "$pkgdir/$_gemdir/gems/$_gemname-$pkgver"
+  rdoc \
+    --format ri \
+    --output "$pkgdir$_gemdir/doc/$_gemname-$pkgver/ri" \
+    ./lib
+  # delete unnecessary rdoc metadata file
+  rm -f "$pkgdir$_gemdir/doc/$_gemname-$pkgver/ri/created.rid"
 }