diff --git a/rb/Steepfile b/rb/Steepfile
index 818a0e794f778..b051298ba21fe 100644
--- a/rb/Steepfile
+++ b/rb/Steepfile
@@ -3,4 +3,6 @@
 target :lib do
   signature 'sig' # Signature directory
   check 'lib' # Directory name
+
+  library 'forwardable' # Standard libraries
 end
diff --git a/rb/lib/selenium/webdriver/common/logger.rb b/rb/lib/selenium/webdriver/common/logger.rb
index 50c902dfb7504..f921d3c53cdeb 100644
--- a/rb/lib/selenium/webdriver/common/logger.rb
+++ b/rb/lib/selenium/webdriver/common/logger.rb
@@ -103,7 +103,7 @@ def ignore(*ids)
       #
       # @param [Array, Symbol] ids
       #
-      def allow(ids)
+      def allow(*ids)
         @allowed += Array(ids).flatten
       end
 
diff --git a/rb/sig/lib/selenium/webdriver/common/log_entry.rbs b/rb/sig/lib/selenium/webdriver/common/log_entry.rbs
new file mode 100644
index 0000000000000..64b6c97d608c7
--- /dev/null
+++ b/rb/sig/lib/selenium/webdriver/common/log_entry.rbs
@@ -0,0 +1,25 @@
+module Selenium
+  module WebDriver
+    class LogEntry
+      @level: String
+
+      @timestamp: Integer
+
+      @message: String
+
+      attr_reader level: String
+
+      attr_reader timestamp: Integer
+
+      attr_reader message: String
+
+      def initialize: (String level, Integer timestamp, String message) -> void
+
+      def as_json: (*untyped?) -> Hash[String, Integer | String]
+
+      def to_s: () -> String
+
+      def time: () -> Time
+    end
+  end
+end
diff --git a/rb/sig/lib/selenium/webdriver/common/logger.rbs b/rb/sig/lib/selenium/webdriver/common/logger.rbs
index 386c971a5b924..76373351eeccc 100644
--- a/rb/sig/lib/selenium/webdriver/common/logger.rbs
+++ b/rb/sig/lib/selenium/webdriver/common/logger.rbs
@@ -3,33 +3,39 @@ module Selenium
     class Logger
       extend Forwardable
 
-      def initialize: (?::String progname, ?default_level: Symbol? default_level, ?ignored: bool? ignored, ?allowed: bool? allowed) -> void
+      @allowed: Array[Symbol]
+      @first_warning: bool
 
-      def level=: (Symbol level) -> untyped
+      @ignored: Array[Symbol]
+      @logger: ::Logger
 
-      def output=: (String io) -> IO
+      def initialize: (?::String progname, ?default_level: Symbol? default_level, ?ignored: Array[Symbol]? ignored, ?allowed: Array[Symbol]? allowed) -> void
+
+      def level=: (Symbol level) -> Symbol
+
+      def output=: (String io) -> ::Logger
 
       def io: () -> IO
 
-      def ignore: (*Symbol ids) -> untyped
+      def ignore: (*Symbol ids) -> Array[Symbol]
 
-      def allow: (*Symbol ids) -> untyped
+      def allow: (*Symbol ids) -> Array[Symbol]
 
-      def debug: (String message, ?id: Symbol | Array[Symbol] id) { () -> untyped } -> untyped
+      def debug: (String message, ?id: Symbol | Array[Symbol] id) ?{ () -> void  } -> void
 
-      def info: (String message, ?id: Symbol | Array[Symbol] id) { () -> untyped } -> untyped
+      def info: (String message, ?id: Symbol | Array[Symbol] id) ?{ () -> void } -> void
 
-      def error: (String message, ?id: Symbol | Array[Symbol] id) { () -> untyped } -> untyped
+      def error: (String message, ?id: Symbol | Array[Symbol] id) { () -> void } -> void
 
-      def warn: (String message, ?id: Symbol | Array[Symbol] id) { () -> untyped } -> untyped
+      def warn: (String message, ?id: Symbol | Array[Symbol] id) { () -> void } -> void
 
-      def deprecate: (String old, ?String? new, ?id: Symbol | Array[Symbol] id, ?reference: ::String reference) { () -> untyped } -> (nil | untyped)
+      def deprecate: (String old, ?String? new, ?id: Symbol | Array[Symbol] id, ?reference: ::String reference) { () -> void } -> (void)
 
       private
 
-      def create_logger: (String name, level: Symbol level) -> untyped
+      def create_logger: (String name, level: Symbol level) -> ::Logger
 
-      def discard_or_log: (Symbol level, String message, Symbol | Array[Symbol] id) { () -> untyped } -> (nil | untyped)
+      def discard_or_log: (Symbol level, String message, (::Symbol | ::Array[::Symbol]) | [(::Symbol | ::Array[::Symbol])] id) ?{ () -> void } -> (void)
     end
   end
 end