diff --git a/Appraisals b/Appraisals
index 858d34b2f..b63bc2289 100644
--- a/Appraisals
+++ b/Appraisals
@@ -12,15 +12,15 @@ end
 
 appraise "cucumber_6" do
   gem "cucumber", "~> 6.0"
-  gem "childprocess", "~> 4.0"
+  gem "childprocess", "~> 4.0.0"
 end
 
 appraise "cucumber_7" do
   gem "cucumber", "~> 7.0"
-  gem "childprocess", "~> 4.0"
+  gem "childprocess", "~> 4.0.0"
 end
 
 appraise "cucumber_8" do
   gem "cucumber", "~> 8.0"
-  gem "childprocess", "~> 4.0"
+  gem "childprocess", "~> 4.1.0"
 end
diff --git a/gemfiles/cucumber_6.gemfile b/gemfiles/cucumber_6.gemfile
index bf0fddd41..a1c47bebf 100644
--- a/gemfiles/cucumber_6.gemfile
+++ b/gemfiles/cucumber_6.gemfile
@@ -3,6 +3,6 @@
 source "https://rubygems.org"
 
 gem "cucumber", "~> 6.0"
-gem "childprocess", "~> 4.0"
+gem "childprocess", "~> 4.0.0"
 
 gemspec path: "../"
diff --git a/gemfiles/cucumber_7.gemfile b/gemfiles/cucumber_7.gemfile
index d2d03225d..9fd34c179 100644
--- a/gemfiles/cucumber_7.gemfile
+++ b/gemfiles/cucumber_7.gemfile
@@ -3,6 +3,6 @@
 source "https://rubygems.org"
 
 gem "cucumber", "~> 7.0"
-gem "childprocess", "~> 4.0"
+gem "childprocess", "~> 4.0.0"
 
 gemspec path: "../"
diff --git a/gemfiles/cucumber_8.gemfile b/gemfiles/cucumber_8.gemfile
index 0d2757c27..18802f433 100644
--- a/gemfiles/cucumber_8.gemfile
+++ b/gemfiles/cucumber_8.gemfile
@@ -3,6 +3,6 @@
 source "https://rubygems.org"
 
 gem "cucumber", "~> 8.0"
-gem "childprocess", "~> 4.0"
+gem "childprocess", "~> 4.1.0"
 
 gemspec path: "../"