diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0bd16a2..28e3ff6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+0.4.3
+
+- Remove deprecated `width`, `height` config.
+- Delete session key after verify (#23).
+
 0.4.2
 -----
 
diff --git a/lib/rucaptcha/configuration.rb b/lib/rucaptcha/configuration.rb
index 3286a14..667fc44 100644
--- a/lib/rucaptcha/configuration.rb
+++ b/lib/rucaptcha/configuration.rb
@@ -1,7 +1,5 @@
 module RuCaptcha
   class Configuration
-    # TODO: remove height, width in 0.3.0
-    attr_accessor :height, :width
     # Image font size, default 45
     attr_accessor :font_size
     # Number of chars, default 4