diff --git a/lib/install/coffee.rb b/lib/install/coffee.rb
index 37e88acbc..347b409a9 100644
--- a/lib/install/coffee.rb
+++ b/lib/install/coffee.rb
@@ -20,6 +20,6 @@
   "#{Webpacker.config.source_entry_path}/hello_coffee.coffee"
 
 say "Installing all Coffeescript dependencies"
-run "yarn add coffeescript@1.12.7 coffee-loader"
+run "yarn add --dev coffeescript@1.12.7 coffee-loader"
 
 say "Webpacker now supports Coffeeescript 🎉", :green
diff --git a/lib/install/elm.rb b/lib/install/elm.rb
index 2cbfebc02..e61229347 100644
--- a/lib/install/elm.rb
+++ b/lib/install/elm.rb
@@ -21,8 +21,8 @@
   "#{Webpacker.config.source_path}/Main.elm"
 
 say "Installing all Elm dependencies"
-run "yarn add elm elm-webpack-loader"
-run "yarn add --dev elm-hot-loader"
+run "yarn add elm"
+run "yarn add --dev elm-hot-loader elm-webpack-loader"
 run "yarn run elm package install -- --yes"
 
 say "Updating webpack paths to include .elm file extension"
diff --git a/lib/install/erb.rb b/lib/install/erb.rb
index d4fe34570..1ee7456ea 100644
--- a/lib/install/erb.rb
+++ b/lib/install/erb.rb
@@ -20,6 +20,6 @@
   "#{Webpacker.config.source_entry_path}/hello_erb.js.erb"
 
 say "Installing all Erb dependencies"
-run "yarn add rails-erb-loader"
+run "yarn add --dev rails-erb-loader"
 
 say "Webpacker now supports Erb in JS 🎉", :green
diff --git a/lib/install/typescript.rb b/lib/install/typescript.rb
index c904120b3..5317ef419 100644
--- a/lib/install/typescript.rb
+++ b/lib/install/typescript.rb
@@ -41,6 +41,6 @@
   "#{Webpacker.config.source_entry_path}/hello_typescript.ts"
 
 say "Installing all typescript dependencies"
-run "yarn add typescript ts-loader #{additional_packages}"
+run "yarn add --dev typescript ts-loader #{additional_packages}"
 
 say "Webpacker now supports typescript 🎉", :green
diff --git a/lib/install/vue.rb b/lib/install/vue.rb
index 2687e883d..288ebb763 100644
--- a/lib/install/vue.rb
+++ b/lib/install/vue.rb
@@ -24,6 +24,7 @@
   "#{Webpacker.config.source_path}/app.vue"
 
 say "Installing all Vue dependencies"
-run "yarn add vue vue-loader vue-template-compiler"
+run "yarn add vue"
+run "yarn add --dev vue-loader vue-template-compiler"
 
 say "Webpacker now supports Vue.js 🎉", :green