diff --git a/CHANGELOG.md b/CHANGELOG.md
index 28e3ff6..e9b9391 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 - Remove deprecated `width`, `height` config.
 - Delete session key after verify (#23).
+- Lighter text color, improve style.
 
 0.4.2
 -----
diff --git a/Gemfile.lock b/Gemfile.lock
index daad2dd..7067620 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    rucaptcha (0.4.2)
+    rucaptcha (0.4.3)
       posix-spawn (>= 0.3.0)
 
 GEM
diff --git a/lib/rucaptcha.rb b/lib/rucaptcha.rb
index c139f84..14cc0a7 100644
--- a/lib/rucaptcha.rb
+++ b/lib/rucaptcha.rb
@@ -16,7 +16,7 @@ module RuCaptcha
       @config = Configuration.new
       @config.len         = 4
       @config.font_size   = 45
-      @config.implode     = 0.4
+      @config.implode     = 0.3
       @config.cache_limit = 100
       @config.expires_in  = 2.minutes
       @config.style       = :colorful
diff --git a/lib/rucaptcha/captcha.rb b/lib/rucaptcha/captcha.rb
index 602c653..59b8b1a 100644
--- a/lib/rucaptcha/captcha.rb
+++ b/lib/rucaptcha/captcha.rb
@@ -61,7 +61,7 @@ module RuCaptcha
           #{line_opts.join(' ')} \
           -pointsize #{font_size} -weight 500 \
           #{text_opts.join(' ')}  \
-          -wave #{rand(2) + 1}x#{rand(2) + 1} \
+          -wave #{rand(2) + 3}x#{rand(2) + 1} \
           -rotate #{rand(10) - 5} \
           -gravity NorthWest -sketch 1x10+#{rand(2)} \
           -fill none \
diff --git a/lib/rucaptcha/configuration.rb b/lib/rucaptcha/configuration.rb
index 667fc44..7a87cf7 100644
--- a/lib/rucaptcha/configuration.rb
+++ b/lib/rucaptcha/configuration.rb
@@ -4,7 +4,7 @@ module RuCaptcha
     attr_accessor :font_size
     # Number of chars, default 4
     attr_accessor :len
-    # implode, default 0.4
+    # implode, default 0.3
     attr_accessor :implode
     # Number of Captcha codes limit
     # set 0 to disable limit and file cache, default: 100
diff --git a/lib/rucaptcha/version.rb b/lib/rucaptcha/version.rb
index 2164093..77ea63e 100644
--- a/lib/rucaptcha/version.rb
+++ b/lib/rucaptcha/version.rb
@@ -1,3 +1,3 @@
 module RuCaptcha
-  VERSION = '0.4.2'
+  VERSION = '0.4.3'
 end