diff --git a/lib/kamal/cli/accessory.rb b/lib/kamal/cli/accessory.rb
index 45efbe6e..14114a25 100644
--- a/lib/kamal/cli/accessory.rb
+++ b/lib/kamal/cli/accessory.rb
@@ -147,7 +147,7 @@ class Kamal::Cli::Accessory < Kamal::Cli::Base
   option :grep, aliases: "-g", desc: "Show lines with grep match only (use this to fetch specific requests by id)"
   option :grep_options, aliases: "-o", desc: "Additional options supplied to grep"
   option :follow, aliases: "-f", desc: "Follow logs on primary server (or specific host set by --hosts)"
-  option :skip_timestamps, aliases: "-T", desc: "Skip appending timestamps to logging output"
+  option :skip_timestamps, type: :boolean, aliases: "-T", desc: "Skip appending timestamps to logging output"
   def logs(name)
     with_accessory(name) do |accessory, hosts|
       grep = options[:grep]
diff --git a/lib/kamal/cli/app.rb b/lib/kamal/cli/app.rb
index 2382951d..7c77a7cf 100644
--- a/lib/kamal/cli/app.rb
+++ b/lib/kamal/cli/app.rb
@@ -188,7 +188,7 @@ class Kamal::Cli::App < Kamal::Cli::Base
   option :grep, aliases: "-g", desc: "Show lines with grep match only (use this to fetch specific requests by id)"
   option :grep_options, aliases: "-o", desc: "Additional options supplied to grep"
   option :follow, aliases: "-f", desc: "Follow log on primary server (or specific host set by --hosts)"
-  option :skip_timestamps, aliases: "-T", desc: "Skip appending timestamps to logging output"
+  option :skip_timestamps, type: :boolean, aliases: "-T", desc: "Skip appending timestamps to logging output"
   def logs
     # FIXME: Catch when app containers aren't running
 
diff --git a/lib/kamal/cli/proxy.rb b/lib/kamal/cli/proxy.rb
index 0fc595b0..66912e07 100644
--- a/lib/kamal/cli/proxy.rb
+++ b/lib/kamal/cli/proxy.rb
@@ -140,7 +140,7 @@ class Kamal::Cli::Proxy < Kamal::Cli::Base
   option :lines, type: :numeric, aliases: "-n", desc: "Number of log lines to pull from each server"
   option :grep, aliases: "-g", desc: "Show lines with grep match only (use this to fetch specific requests by id)"
   option :follow, aliases: "-f", desc: "Follow logs on primary server (or specific host set by --hosts)"
-  option :skip_timestamps, aliases: "-T", desc: "Skip appending timestamps to logging output"
+  option :skip_timestamps, type: :boolean, aliases: "-T", desc: "Skip appending timestamps to logging output"
   def logs
     grep = options[:grep]
     timestamps = !options[:skip_timestamps]