diff --git a/Gemfile b/Gemfile
index 800f114..0a77df4 100644
--- a/Gemfile
+++ b/Gemfile
@@ -12,6 +12,9 @@ gemspec
 
 # Remaining group is only used for development.
 group :development do
+  # Depend on this here, not in the gemspec - to avoid having to have
+  # client applications induce circular dependencies
+  gem "train-core", "~> 3.0"
   gem "bundler"
   gem "byebug"
   gem "m"
diff --git a/train-winrm.gemspec b/train-winrm.gemspec
index 1b95375..260ea5c 100644
--- a/train-winrm.gemspec
+++ b/train-winrm.gemspec
@@ -38,8 +38,7 @@ Gem::Specification.new do |spec|
   # them in Gemfile, not here.
 
   # Do not list inspec as a dependency of a train plugin.
-
-  spec.add_dependency "train", "~> 3.0"
+  # Do not list train or train-core as a dependency of a train plugin.
   spec.add_dependency "winrm", "~> 2.0"
   spec.add_dependency "winrm-fs", "~> 1.0"
 end