diff --git a/lib/project_types/script/layers/infrastructure/assemblyscript_task_runner.rb b/lib/project_types/script/layers/infrastructure/assemblyscript_task_runner.rb
index 1d710c779b..5ed672c9a3 100644
--- a/lib/project_types/script/layers/infrastructure/assemblyscript_task_runner.rb
+++ b/lib/project_types/script/layers/infrastructure/assemblyscript_task_runner.rb
@@ -34,7 +34,9 @@ def install_dependencies
 
         def dependencies_installed?
           # Assuming if node_modules folder exist at root of script folder, all deps are installed
-          ctx.dir_exist?("node_modules")
+          return false unless ctx.dir_exist?("node_modules")
+          check_if_ep_dependencies_up_to_date!
+          true
         end
 
         private
@@ -58,6 +60,39 @@ def compile
         def bytecode
           File.read(format(BYTECODE_FILE, name: script_name))
         end
+
+        def check_if_ep_dependencies_up_to_date!
+          return true if ENV['SHOPIFY_CLI_SCRIPTS_IGNORE_OUTDATED']
+
+          # ignore exit code since it will not be 0 unless every package is up to date which they probably won't be
+          out, _ = ctx.capture2e("npm", "outdated", "--json", "--depth", "0")
+          parsed_outdated_check = JSON.parse(out)
+          outdated_ep_packages = parsed_outdated_check
+            .select { |package_name, _| package_name.start_with?('@shopify/extension-point-as-') }
+            .select { |_, version_info| !package_is_up_to_date?(version_info) }
+            .keys
+          raise Errors::PackagesOutdatedError.new(outdated_ep_packages),
+            "NPM packages out of date: #{outdated_ep_packages.join(', ')}" unless outdated_ep_packages.empty?
+        end
+
+        def package_is_up_to_date?(version_info)
+          require 'semantic/semantic'
+          current_version = version_info['current']
+          latest_version = version_info['latest']
+
+          # making an assumption that the script developer knows what they're doing if they're not referencing a
+          # semver version
+          begin
+            current_version = ::Semantic::Version.new(current_version)
+            latest_version = ::Semantic::Version.new(latest_version)
+          rescue ArgumentError
+            return true
+          end
+
+          return false if current_version.major < latest_version.major
+          return false if latest_version.major == 0 && current_version.minor < latest_version.minor
+          true
+        end
       end
     end
   end
diff --git a/lib/project_types/script/layers/infrastructure/errors.rb b/lib/project_types/script/layers/infrastructure/errors.rb
index ecd0cee315..40c48efcc0 100644
--- a/lib/project_types/script/layers/infrastructure/errors.rb
+++ b/lib/project_types/script/layers/infrastructure/errors.rb
@@ -34,6 +34,13 @@ class ShopAuthenticationError < ScriptProjectError; end
         class ShopScriptConflictError < ScriptProjectError; end
         class ShopScriptUndefinedError < ScriptProjectError; end
         class TaskRunnerNotFoundError < ScriptProjectError; end
+        class PackagesOutdatedError < ScriptProjectError
+          attr_reader :outdated_packages
+          def initialize(outdated_packages)
+            super("EP packages are outdated and need to be updated: #{outdated_packages.join(', ')}")
+            @outdated_packages = outdated_packages
+          end
+        end
       end
     end
   end
diff --git a/lib/project_types/script/messages/messages.rb b/lib/project_types/script/messages/messages.rb
index 72052e275f..c24f89e5e5 100644
--- a/lib/project_types/script/messages/messages.rb
+++ b/lib/project_types/script/messages/messages.rb
@@ -71,6 +71,9 @@ module Messages
           shop_script_conflict_help: "Disable that script or uninstall that app and try again.",
 
           shop_script_undefined_cause: "Script is already turned off in store.",
+
+          packages_outdated_cause: "The following npm packages are out of date: %s.",
+          packages_outdated_help: "Run `npm update` to update them.",
         },
 
         create: {
diff --git a/lib/project_types/script/ui/error_handler.rb b/lib/project_types/script/ui/error_handler.rb
index c88974d1aa..24771b778c 100644
--- a/lib/project_types/script/ui/error_handler.rb
+++ b/lib/project_types/script/ui/error_handler.rb
@@ -142,6 +142,14 @@ def self.error_messages(e)
           {
             cause_of_error: ShopifyCli::Context.message('script.error.shop_script_undefined_cause'),
           }
+        when Layers::Infrastructure::Errors::PackagesOutdatedError
+          {
+            cause_of_error: ShopifyCli::Context.message(
+              'script.error.packages_outdated_cause',
+              e.outdated_packages.join(', ')
+            ),
+            help_suggestion: ShopifyCli::Context.message('script.error.packages_outdated_help'),
+          }
         end
       end
     end
diff --git a/test/project_types/script/layers/infrastructure/assemblyscript_task_runner_test.rb b/test/project_types/script/layers/infrastructure/assemblyscript_task_runner_test.rb
index 26e245bbe4..99181b96f0 100644
--- a/test/project_types/script/layers/infrastructure/assemblyscript_task_runner_test.rb
+++ b/test/project_types/script/layers/infrastructure/assemblyscript_task_runner_test.rb
@@ -61,15 +61,70 @@
   describe ".dependencies_installed?" do
     subject { as_task_runner.dependencies_installed? }
 
-    it "should return true if node_modules folder exists" do
+    before do
       FileUtils.mkdir_p("node_modules")
+    end
+
+    it "should return true if node_modules folder exists" do
+      stub_npm_outdated({})
       assert_equal true, subject
     end
 
     it "should return false if node_modules folder does not exists" do
       Dir.stubs(:exist?).returns(false)
+      stub_npm_outdated({})
       assert_equal false, subject
     end
+
+    it "should not error if `npm outdated` returns nothing" do
+      stub_npm_outdated({})
+      subject
+    end
+
+    it "should not error if `npm outdated` does not return an EP package" do
+      stub_npm_outdated(create_package_version_info(package_name: "somepackage"))
+      subject
+    end
+
+    it "should not error if current version is linked" do
+      stub_npm_outdated(create_package_version_info(current: "linked"))
+      subject
+    end
+
+    it "should not error if latest version is an https URL" do
+      stub_npm_outdated(create_package_version_info(latest: "https://github.com/somethingsomething"))
+      subject
+    end
+
+    it "should not error if patch version is different" do
+      stub_npm_outdated(create_package_version_info(current: "0.9.0", latest: "0.9.1"))
+      subject
+    end
+
+    it "should not error if it's a non-zero major version and minor version is different" do
+      stub_npm_outdated(create_package_version_info(current: "1.0.0", latest: "1.1.0"))
+      subject
+    end
+
+    it "should error if it's a zero major version and minor version is different" do
+      package_name = "@shopify/extension-point-as-foo"
+      stub_npm_outdated(create_package_version_info(package_name: package_name, current: "0.9.0", latest: "0.10.0"))
+      msg = "NPM packages out of date: #{package_name}"
+      error = assert_raises Script::Layers::Infrastructure::Errors::PackagesOutdatedError, msg do
+        subject
+      end
+      assert_equal msg, error.message
+    end
+
+    it "should error if major version is different" do
+      package_name = "@shopify/extension-point-as-foo"
+      stub_npm_outdated(create_package_version_info(package_name: package_name, current: "0.9.0", latest: "1.0.0"))
+      msg = "NPM packages out of date: #{package_name}"
+      error = assert_raises Script::Layers::Infrastructure::Errors::PackagesOutdatedError do
+        subject
+      end
+      assert_equal msg, error.message
+    end
   end
 
   describe ".install_dependencies" do
@@ -93,4 +148,16 @@
       end
     end
   end
+
+  private
+
+  def stub_npm_outdated(output)
+    ctx.stubs(:capture2e)
+      .with("npm", "outdated", "--json", "--depth", "0")
+      .returns([output.to_json, mock])
+  end
+
+  def create_package_version_info(package_name: "@shopify/extension-point-as-foo", current: "0.9.0", latest: "0.10.0")
+    { package_name => { "current" => current, "latest" => latest } }
+  end
 end