diff --git a/Gemfile.lock b/Gemfile.lock
index 468ec498..c1dd625a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,9 +7,9 @@ GIT
 
 GIT
   remote: https://github.com/html2rss/html2rss.git
-  revision: c133c1b0fb443ced9bae7ebf9b95de0cbee9a8db
+  revision: 510ba8436b5910cf0a760a47a14e0922efe74c94
   specs:
-    html2rss (0.20.0)
+    html2rss (0.21.0)
       addressable (~> 2.7)
       brotli
       dry-validation
@@ -19,7 +19,6 @@ GIT
       kramdown
       mime-types (> 3.0)
       nokogiri (>= 1.10, < 2.0)
-      parallel
       puppeteer-ruby
       regexp_parser
       reverse_markdown (~> 3.0)
@@ -53,7 +52,7 @@ GEM
       traces (~> 0.10)
     async-pool (0.11.2)
       async (>= 2.0)
-    async-websocket (0.30.0)
+    async-websocket (0.30.1)
       async-http (~> 0.76)
       protocol-http (~> 0.34)
       protocol-rack (~> 0.7)
@@ -118,9 +117,9 @@ GEM
       fiber-storage
     fiber-storage (1.0.1)
     io-endpoint (0.17.2)
-    io-event (1.16.1)
-    io-stream (0.13.0)
-    json (2.19.8)
+    io-event (1.16.2)
+    io-stream (0.13.1)
+    json (2.19.9)
     kramdown (2.5.2)
       rexml (>= 3.4.4)
     logger (1.7.0)
@@ -135,7 +134,6 @@ GEM
       racc (~> 1.4)
     nokogiri (1.19.3-x86_64-linux-gnu)
       racc (~> 1.4)
-    parallel (2.1.0)
     protocol-hpack (1.5.1)
     protocol-http (0.62.2)
     protocol-http1 (0.39.0)
@@ -163,7 +161,7 @@ GEM
     reverse_markdown (3.0.2)
       nokogiri
     rexml (3.4.4)
-    rss (0.3.2)
+    rss (0.3.3)
       rexml
     sanitize (7.0.0)
       crass (~> 1.0.2)