diff --git a/Gemfile.lock b/Gemfile.lock
index 854d263c3..e91980b48 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    fastlane-plugin-wpmreleasetoolkit (0.9.12)
+    fastlane-plugin-wpmreleasetoolkit (0.9.13)
       activesupport (~> 4)
       chroma (= 0.2.0)
       diffy (~> 3.3)
@@ -59,7 +59,7 @@ GEM
     colored2 (3.1.2)
     commander-fastlane (4.4.6)
       highline (~> 1.7.2)
-    concurrent-ruby (1.1.6)
+    concurrent-ruby (1.1.7)
     cork (0.3.0)
       colored2 (~> 3.1)
     danger (8.0.1)
@@ -78,7 +78,7 @@ GEM
     declarative (0.0.10)
     declarative-option (0.1.0)
     diff-lcs (1.3)
-    diffy (3.3.0)
+    diffy (3.4.0)
     digest-crc (0.5.1)
     docile (1.3.1)
     domain_name (0.5.20190701)
@@ -200,7 +200,7 @@ GEM
     octokit (4.18.0)
       faraday (>= 0.9)
       sawyer (~> 0.8.0, >= 0.5.3)
-    oj (3.10.7)
+    oj (3.10.8)
     open4 (1.3.4)
     optimist (3.0.1)
     options (2.3.2)
@@ -227,7 +227,7 @@ GEM
       uber (< 0.2.0)
     retriable (3.1.2)
     rexml (3.2.4)
-    rmagick (2.16.0)
+    rmagick (4.1.2)
     rouge (2.0.7)
     rspec (3.8.0)
       rspec-core (~> 3.8.0)
@@ -313,7 +313,7 @@ DEPENDENCIES
   fastlane (~> 2)
   fastlane-plugin-wpmreleasetoolkit!
   pry (~> 0.12.2)
-  rmagick (~> 2.15)
+  rmagick (~> 4.1)
   rspec (~> 3.8)
   rspec_junit_formatter (~> 0.4.1)
   rubocop (= 0.75)
diff --git a/fastlane-plugin-wpmreleasetoolkit.gemspec b/fastlane-plugin-wpmreleasetoolkit.gemspec
index 104f1b1b3..5819c4878 100644
--- a/fastlane-plugin-wpmreleasetoolkit.gemspec
+++ b/fastlane-plugin-wpmreleasetoolkit.gemspec
@@ -54,5 +54,5 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency('rubocop-require_tools', '~> 0.1.2')
   spec.add_development_dependency('simplecov', '~> 0.16.1')
   spec.add_development_dependency('fastlane', '~> 2')
-  spec.add_development_dependency('rmagick', '~> 2.15')
+  spec.add_development_dependency('rmagick', '~> 4.1')
 end
diff --git a/lib/fastlane/plugin/wpmreleasetoolkit/helper/promo_screenshots_helper.rb b/lib/fastlane/plugin/wpmreleasetoolkit/helper/promo_screenshots_helper.rb
index 9c38c6194..2dc43e3b1 100644
--- a/lib/fastlane/plugin/wpmreleasetoolkit/helper/promo_screenshots_helper.rb
+++ b/lib/fastlane/plugin/wpmreleasetoolkit/helper/promo_screenshots_helper.rb
@@ -292,7 +292,7 @@ def draw_text_to_canvas(canvas, text, width, height, x_position, y_position, fon
       #
       # @return [Magick::Image] The masked image
       def mask_image(image, mask, offset_x = 0, offset_y = 0)
-          image.composite(mask, offset_x, offset_y, CopyOpacityCompositeOp)
+          image.composite(mask, offset_x, offset_y, CopyAlphaCompositeOp)
       end
 
       # resize_image
diff --git a/lib/fastlane/plugin/wpmreleasetoolkit/version.rb b/lib/fastlane/plugin/wpmreleasetoolkit/version.rb
index 99d287161..68b5ce236 100644
--- a/lib/fastlane/plugin/wpmreleasetoolkit/version.rb
+++ b/lib/fastlane/plugin/wpmreleasetoolkit/version.rb
@@ -1,5 +1,5 @@
 module Fastlane
   module Wpmreleasetoolkit
-    VERSION = "0.9.12"
+    VERSION = "0.9.13"
   end
 end