diff --git a/Gemfile.lock b/Gemfile.lock
index c057d7f6b..486b29ed9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -16,9 +16,9 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    actionpack (7.1.4.1)
-      actionview (= 7.1.4.1)
-      activesupport (= 7.1.4.1)
+    actionpack (7.1.5.1)
+      actionview (= 7.1.5.1)
+      activesupport (= 7.1.5.1)
       nokogiri (>= 1.8.5)
       racc
       rack (>= 2.2.4)
@@ -26,27 +26,31 @@ GEM
       rack-test (>= 0.6.3)
       rails-dom-testing (~> 2.2)
       rails-html-sanitizer (~> 1.6)
-    actionview (7.1.4.1)
-      activesupport (= 7.1.4.1)
+    actionview (7.1.5.1)
+      activesupport (= 7.1.5.1)
       builder (~> 3.1)
       erubi (~> 1.11)
       rails-dom-testing (~> 2.2)
       rails-html-sanitizer (~> 1.6)
-    activesupport (7.1.4.1)
+    activesupport (7.1.5.1)
       base64
+      benchmark (>= 0.3)
       bigdecimal
       concurrent-ruby (~> 1.0, >= 1.0.2)
       connection_pool (>= 2.2.5)
       drb
       i18n (>= 1.6, < 2)
+      logger (>= 1.4.2)
       minitest (>= 5.1)
       mutex_m
+      securerandom (>= 0.3)
       tzinfo (~> 2.0)
     ast (2.4.2)
     base64 (0.2.0)
     bcrypt_pbkdf (1.1.1)
     bcrypt_pbkdf (1.1.1-arm64-darwin)
     bcrypt_pbkdf (1.1.1-x86_64-darwin)
+    benchmark (0.4.0)
     bigdecimal (3.1.8)
     builder (3.3.0)
     concurrent-ruby (1.3.4)
@@ -67,23 +71,24 @@ GEM
       reline (>= 0.4.2)
     json (2.7.2)
     language_server-protocol (3.17.0.3)
-    loofah (2.22.0)
+    logger (1.6.2)
+    loofah (2.23.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.12.0)
-    minitest (5.25.1)
+    minitest (5.25.4)
     mocha (2.4.5)
       ruby2_keywords (>= 0.0.5)
-    mutex_m (0.2.0)
+    mutex_m (0.3.0)
     net-scp (4.0.0)
       net-ssh (>= 2.6.5, < 8.0.0)
     net-sftp (4.0.0)
       net-ssh (>= 5.0.0, < 8.0.0)
     net-ssh (7.3.0)
-    nokogiri (1.16.7-arm64-darwin)
+    nokogiri (1.17.1-arm64-darwin)
       racc (~> 1.4)
-    nokogiri (1.16.7-x86_64-darwin)
+    nokogiri (1.17.1-x86_64-darwin)
       racc (~> 1.4)
-    nokogiri (1.16.7-x86_64-linux)
+    nokogiri (1.17.1-x86_64-linux)
       racc (~> 1.4)
     parallel (1.25.1)
     parser (3.3.4.0)
@@ -104,12 +109,12 @@ GEM
       activesupport (>= 5.0.0)
       minitest
       nokogiri (>= 1.6)
-    rails-html-sanitizer (1.6.0)
+    rails-html-sanitizer (1.6.1)
       loofah (~> 2.21)
-      nokogiri (~> 1.14)
-    railties (7.1.4.1)
-      actionpack (= 7.1.4.1)
-      activesupport (= 7.1.4.1)
+      nokogiri (>= 1.15.7, != 1.16.7, != 1.16.6, != 1.16.5, != 1.16.4, != 1.16.3, != 1.16.2, != 1.16.1, != 1.16.0.rc1, != 1.16.0)
+    railties (7.1.5.1)
+      actionpack (= 7.1.5.1)
+      activesupport (= 7.1.5.1)
       irb
       rackup (>= 1.0.0)
       rake (>= 12.2)
@@ -154,6 +159,7 @@ GEM
       rubocop-rails
     ruby-progressbar (1.13.0)
     ruby2_keywords (0.0.5)
+    securerandom (0.4.0)
     sshkit (1.23.0)
       base64
       net-scp (>= 1.1.2)
diff --git a/lib/kamal/cli/app/boot.rb b/lib/kamal/cli/app/boot.rb
index 41db39a66..8ddcaac36 100644
--- a/lib/kamal/cli/app/boot.rb
+++ b/lib/kamal/cli/app/boot.rb
@@ -45,7 +45,7 @@ def old_version_renamed_if_clashing
 
     def start_new_version
       audit "Booted app version #{version}"
-      hostname = "#{host.to_s[0...51].gsub(/\.+$/, '')}-#{SecureRandom.hex(6)}"
+      hostname = "#{host.to_s[0...51].chomp(".")}-#{SecureRandom.hex(6)}"
 
       execute *app.ensure_env_directory
       upload! role.secrets_io(host), role.secrets_path, mode: "0600"
diff --git a/lib/kamal/configuration.rb b/lib/kamal/configuration.rb
index 23d13e993..52c807d7a 100644
--- a/lib/kamal/configuration.rb
+++ b/lib/kamal/configuration.rb
@@ -14,7 +14,7 @@ class Kamal::Configuration
 
   include Validation
 
-  PROXY_MINIMUM_VERSION = "v0.8.3"
+  PROXY_MINIMUM_VERSION = "v0.8.4"
   PROXY_HTTP_PORT = 80
   PROXY_HTTPS_PORT = 443
   PROXY_LOG_MAX_SIZE = "10m"
@@ -37,7 +37,7 @@ def load_config_file(file)
         if file.exist?
           # Newer Psych doesn't load aliases by default
           load_method = YAML.respond_to?(:unsafe_load) ? :unsafe_load : :load
-          YAML.send(load_method, ERB.new(IO.read(file)).result).symbolize_keys
+          YAML.send(load_method, ERB.new(File.read(file)).result).symbolize_keys
         else
           raise "Configuration file not found in #{file}"
         end
diff --git a/lib/kamal/configuration/accessory.rb b/lib/kamal/configuration/accessory.rb
index 2728607d5..198e6321e 100644
--- a/lib/kamal/configuration/accessory.rb
+++ b/lib/kamal/configuration/accessory.rb
@@ -142,7 +142,7 @@ def with_clear_env_loaded
     end
 
     def read_dynamic_file(local_file)
-      StringIO.new(ERB.new(IO.read(local_file)).result)
+      StringIO.new(ERB.new(File.read(local_file)).result)
     end
 
     def expand_remote_file(remote_file)