diff --git a/lib/hanami/cli/commands/app/generate/action.rb b/lib/hanami/cli/commands/app/generate/action.rb
index 226aea86..3e963ee7 100644
--- a/lib/hanami/cli/commands/app/generate/action.rb
+++ b/lib/hanami/cli/commands/app/generate/action.rb
@@ -28,6 +28,9 @@ class Action < App::Command
             DEFAULT_SKIP_ROUTE = false
             private_constant :DEFAULT_SKIP_ROUTE
 
+            DEFAULT_TEMPLATE = "erb"
+            private_constant :DEFAULT_TEMPLATE
+
             argument :name, required: true, desc: "Action name"
             option :url, required: false, type: :string, desc: "Action URL"
             option :http, required: false, type: :string, desc: "Action HTTP method"
@@ -51,6 +54,8 @@ class Action < App::Command
               default: DEFAULT_SKIP_ROUTE,
               desc: "Skip route generation"
             option :slice, required: false, desc: "Slice name"
+            option :template, required: false, type: :string, default: DEFAULT_TEMPLATE,
+                              desc: "Template engine to use (officially supported options: erb, haml, slim)"
 
             # rubocop:disable Layout/LineLength
             example [
@@ -94,6 +99,7 @@ def call(
               skip_view: DEFAULT_SKIP_VIEW,
               skip_tests: DEFAULT_SKIP_TESTS, # rubocop:disable Lint/UnusedMethodArgument,
               skip_route: DEFAULT_SKIP_ROUTE,
+              template: DEFAULT_TEMPLATE,
               slice: nil,
               context: nil,
               **
@@ -106,7 +112,8 @@ def call(
                 raise InvalidActionNameError.new(name)
               end
 
-              generator.call(app.namespace, controller, action, url, http, format, skip_view, skip_route, slice, context: context)
+              generator.call(app.namespace, controller, action, url, http, format, skip_view, skip_route, template, slice,
+                             context: context)
             end
 
             # rubocop:enable Metrics/ParameterLists
diff --git a/lib/hanami/cli/commands/app/generate/view.rb b/lib/hanami/cli/commands/app/generate/view.rb
index 358ff11b..9c0bf107 100644
--- a/lib/hanami/cli/commands/app/generate/view.rb
+++ b/lib/hanami/cli/commands/app/generate/view.rb
@@ -18,10 +18,10 @@ class View < App::Command
             DEFAULT_FORMAT = "html"
             private_constant :DEFAULT_FORMAT
 
-            # TODO: make engine configurable
-
             argument :name, required: true, desc: "View name"
             option :slice, required: false, desc: "Slice name"
+            option :template, required: false, desc: "Template engine to use (officially supported: erb, haml, slim)",
+                              default: "erb"
 
             example [
               %(books.index               (MyApp::Actions::Books::Index)),
@@ -43,10 +43,10 @@ def initialize(
 
             # @since 2.0.0
             # @api private
-            def call(name:, format: DEFAULT_FORMAT, slice: nil, **)
+            def call(name:, format: DEFAULT_FORMAT, template: "erb", slice: nil, **)
               slice = inflector.underscore(Shellwords.shellescape(slice)) if slice
 
-              generator.call(app.namespace, name, format, slice)
+              generator.call(app.namespace, name, format, template, slice)
             end
           end
         end
diff --git a/lib/hanami/cli/generators/app/action.rb b/lib/hanami/cli/generators/app/action.rb
index 6e18da7f..dc8372c4 100644
--- a/lib/hanami/cli/generators/app/action.rb
+++ b/lib/hanami/cli/generators/app/action.rb
@@ -21,12 +21,12 @@ def initialize(fs:, inflector:)
 
           # @since 2.0.0
           # @api private
-          def call(app, controller, action, url, http, format, skip_view, skip_route, slice, context: nil)
+          def call(app, controller, action, url, http, format, skip_view, skip_route, engine, slice, context: nil)
             context ||= ActionContext.new(inflector, app, slice, controller, action)
             if slice
-              generate_for_slice(controller, action, url, http, format, skip_view, skip_route, slice, context)
+              generate_for_slice(controller, action, url, http, format, skip_view, skip_route, engine, slice, context)
             else
-              generate_for_app(controller, action, url, http, format, skip_view, skip_route, context)
+              generate_for_app(controller, action, url, http, format, skip_view, skip_route, engine, context)
             end
           end
 
@@ -72,7 +72,8 @@ def call(app, controller, action, url, http, format, skip_view, skip_route, slic
           attr_reader :inflector
 
           # rubocop:disable Metrics/AbcSize
-          def generate_for_slice(controller, action, url, http, format, skip_view, skip_route, slice, context)
+          def generate_for_slice(controller, action, url, http, format, skip_view, skip_route, engine, slice,
+                                 context)
             slice_directory = fs.join("slices", slice)
             raise MissingSliceError.new(slice) unless fs.directory?(slice_directory)
 
@@ -92,12 +93,12 @@ def generate_for_slice(controller, action, url, http, format, skip_view, skip_ro
               fs.create(fs.join(directory, "#{action}.rb"), t("slice_view.erb", context))
 
               fs.mkdir(directory = fs.join(slice_directory, "templates", controller))
-              fs.create(fs.join(directory, "#{action}.#{format}.erb"),
-                        t(template_with_format_ext("slice_template", format), context))
+              fs.create(fs.join(directory, "#{action}.#{format}.#{engine}"),
+                        t(template_with_format_ext("slice_template", format, engine), context))
             end
           end
 
-          def generate_for_app(controller, action, url, http, format, skip_view, skip_route, context)
+          def generate_for_app(controller, action, url, http, format, skip_view, skip_route, engine, context)
             if generate_route?(skip_route)
               fs.inject_line_at_class_bottom(
                 fs.join("config", "routes.rb"),
@@ -117,8 +118,8 @@ def generate_for_app(controller, action, url, http, format, skip_view, skip_rout
               fs.create(fs.join(view_directory, "#{view}.rb"), t("view.erb", context))
 
               fs.mkdir(template_directory = fs.join("app", "templates", controller))
-              fs.create(fs.join(template_directory, "#{view}.#{format}.erb"),
-                        t(template_with_format_ext("template", format), context))
+              fs.create(fs.join(template_directory, "#{view}.#{format}.#{engine}"),
+                        t(template_with_format_ext("template", format, engine), context))
             end
           end
           # rubocop:enable Metrics/AbcSize
@@ -169,13 +170,13 @@ def corresponding_restful_view(view)
             RESTFUL_COUNTERPART_VIEWS.fetch(view, nil)
           end
 
-          def template_with_format_ext(name, format)
+          def template_with_format_ext(name, format, engine)
             ext =
               case format.to_sym
               when :html
-                ".html.erb"
+                ".html.#{engine}"
               else
-                ".erb"
+                ".#{engine}"
               end
 
             "#{name}#{ext}"
diff --git a/lib/hanami/cli/generators/app/action/slice_template.html.haml b/lib/hanami/cli/generators/app/action/slice_template.html.haml
new file mode 100644
index 00000000..ed317a48
--- /dev/null
+++ b/lib/hanami/cli/generators/app/action/slice_template.html.haml
@@ -0,0 +1 @@
+%h1= <%= camelized_slice_name %>::Views::<%= camelized_controller_name %>::<%= camelized_action_name %>
diff --git a/lib/hanami/cli/generators/app/action/slice_template.html.slim b/lib/hanami/cli/generators/app/action/slice_template.html.slim
new file mode 100644
index 00000000..cd07aceb
--- /dev/null
+++ b/lib/hanami/cli/generators/app/action/slice_template.html.slim
@@ -0,0 +1 @@
+h1 = <%= camelized_slice_name %>::Views::<%= camelized_controller_name %>::<%= camelized_action_name %>
diff --git a/lib/hanami/cli/generators/app/action/template.html.haml b/lib/hanami/cli/generators/app/action/template.html.haml
new file mode 100644
index 00000000..d75914c5
--- /dev/null
+++ b/lib/hanami/cli/generators/app/action/template.html.haml
@@ -0,0 +1 @@
+%h1= <%= camelized_app_name %>::Views::<%= camelized_controller_name %>::<%= camelized_action_name %>
diff --git a/lib/hanami/cli/generators/app/action/template.html.slim b/lib/hanami/cli/generators/app/action/template.html.slim
new file mode 100644
index 00000000..604af63c
--- /dev/null
+++ b/lib/hanami/cli/generators/app/action/template.html.slim
@@ -0,0 +1 @@
+h1 = <%= camelized_app_name %>::Views::<%= camelized_controller_name %>::<%= camelized_action_name %>
diff --git a/lib/hanami/cli/generators/app/view.rb b/lib/hanami/cli/generators/app/view.rb
index f6675438..a34849f3 100644
--- a/lib/hanami/cli/generators/app/view.rb
+++ b/lib/hanami/cli/generators/app/view.rb
@@ -20,13 +20,13 @@ def initialize(fs:, inflector:)
 
           # @since 2.0.0
           # @api private
-          def call(app, key, format, slice)
+          def call(app, key, format, engine, slice)
             context = ViewContext.new(inflector, app, slice, key)
 
             if slice
-              generate_for_slice(context, format, slice)
+              generate_for_slice(context, format, engine, slice)
             else
-              generate_for_app(context, format, slice)
+              generate_for_app(context, format, engine, slice)
             end
           end
 
@@ -38,7 +38,7 @@ def call(app, key, format, slice)
 
           # rubocop:disable Metrics/AbcSize
 
-          def generate_for_slice(context, format, slice)
+          def generate_for_slice(context, format, engine, slice)
             slice_directory = fs.join("slices", slice)
             raise MissingSliceError.new(slice) unless fs.directory?(slice_directory)
 
@@ -46,28 +46,28 @@ def generate_for_slice(context, format, slice)
             fs.create(fs.join(directory, "#{context.name}.rb"), t("slice_view.erb", context))
 
             fs.mkdir(directory = fs.join(slice_directory, "templates", context.namespaces))
-            fs.create(fs.join(directory, "#{context.name}.#{format}.erb"),
-                      t(template_with_format_ext("slice_template", format), context))
+            fs.create(fs.join(directory, "#{context.name}.#{format}.#{engine}"),
+                      t(template_with_format_ext("slice_template", format, engine), context))
           end
 
-          def generate_for_app(context, format, _slice)
+          def generate_for_app(context, format, engine, _slice)
             fs.mkdir(directory = fs.join("app", "views", context.namespaces))
             fs.create(fs.join(directory, "#{context.name}.rb"), t("app_view.erb", context))
 
             fs.mkdir(directory = fs.join("app", "templates", context.namespaces))
-            fs.create(fs.join(directory, "#{context.name}.#{format}.erb"),
-                      t(template_with_format_ext("app_template", format), context))
+            fs.create(fs.join(directory, "#{context.name}.#{format}.#{engine}"),
+                      t(template_with_format_ext("app_template", format, engine), context))
           end
 
           # rubocop:enable Metrics/AbcSize
 
-          def template_with_format_ext(name, format)
+          def template_with_format_ext(name, format, engine)
             ext =
               case format.to_sym
               when :html
-                ".html.erb"
+                ".html.#{engine}"
               else
-                ".erb"
+                ".#{engine}"
               end
 
             "#{name}#{ext}"
diff --git a/lib/hanami/cli/generators/app/view/app_template.html.haml b/lib/hanami/cli/generators/app/view/app_template.html.haml
new file mode 100644
index 00000000..55b809db
--- /dev/null
+++ b/lib/hanami/cli/generators/app/view/app_template.html.haml
@@ -0,0 +1 @@
+%h1 <%= camelized_app_name %>::Views::<%= camelized_namespace %>::<%= camelized_name %>
diff --git a/lib/hanami/cli/generators/app/view/app_template.html.slim b/lib/hanami/cli/generators/app/view/app_template.html.slim
new file mode 100644
index 00000000..fd6073ff
--- /dev/null
+++ b/lib/hanami/cli/generators/app/view/app_template.html.slim
@@ -0,0 +1 @@
+h1 <%= camelized_app_name %>::Views::<%= camelized_namespace %>::<%= camelized_name %>
diff --git a/lib/hanami/cli/generators/app/view/slice_template.html.haml b/lib/hanami/cli/generators/app/view/slice_template.html.haml
new file mode 100644
index 00000000..066657bd
--- /dev/null
+++ b/lib/hanami/cli/generators/app/view/slice_template.html.haml
@@ -0,0 +1 @@
+%h1 <%= camelized_slice_name %>::Views::<%= camelized_namespace %>::<%= camelized_name %>
diff --git a/lib/hanami/cli/generators/app/view/slice_template.html.slim b/lib/hanami/cli/generators/app/view/slice_template.html.slim
new file mode 100644
index 00000000..e3539260
--- /dev/null
+++ b/lib/hanami/cli/generators/app/view/slice_template.html.slim
@@ -0,0 +1 @@
+h1 <%= camelized_slice_name %>::Views::<%= camelized_namespace %>::<%= camelized_name %>
diff --git a/spec/unit/hanami/cli/commands/app/generate/action_spec.rb b/spec/unit/hanami/cli/commands/app/generate/action_spec.rb
index f9561e97..624c4042 100644
--- a/spec/unit/hanami/cli/commands/app/generate/action_spec.rb
+++ b/spec/unit/hanami/cli/commands/app/generate/action_spec.rb
@@ -297,6 +297,28 @@ def handle(request, response)
       end
     end
 
+    it "allows to specify slim template engine" do
+      within_application_directory do
+        subject.call(name: action_name, template: "slim")
+
+        template_file = <<~EXPECTED
+          h1 = Test::Views::Users::Index
+        EXPECTED
+        expect(fs.read("app/templates/#{controller}/#{action}.html.slim")).to eq(template_file)
+      end
+    end
+
+    it "allows to specify HAML template engine" do
+      within_application_directory do
+        subject.call(name: action_name, template: "haml")
+
+        template_file = <<~EXPECTED
+          %h1= Test::Views::Users::Index
+        EXPECTED
+        expect(fs.read("app/templates/#{controller}/#{action}.html.haml")).to eq(template_file)
+      end
+    end
+
     include_context "with existing files" do
       let(:generate_action) { subject.call(name: action_name) }
     end
diff --git a/spec/unit/hanami/cli/commands/app/generate/view_spec.rb b/spec/unit/hanami/cli/commands/app/generate/view_spec.rb
index b761979f..42dc9085 100644
--- a/spec/unit/hanami/cli/commands/app/generate/view_spec.rb
+++ b/spec/unit/hanami/cli/commands/app/generate/view_spec.rb
@@ -92,6 +92,28 @@ class Index < Test::View
       end
     end
 
+    it "allows to specify slim template engine" do
+      within_application_directory do
+        subject.call(name: "special.users.index", template: "slim")
+
+        template_file = <<~EXPECTED
+          h1 Test::Views::Special::Users::Index
+        EXPECTED
+        expect(fs.read("app/templates/special/users/index.html.slim")).to eq(template_file)
+      end
+    end
+
+    it "allows to specify HAML template engine" do
+      within_application_directory do
+        subject.call(name: "special.users.index", template: "haml")
+
+        template_file = <<~EXPECTED
+          %h1 Test::Views::Special::Users::Index
+        EXPECTED
+        expect(fs.read("app/templates/special/users/index.html.haml")).to eq(template_file)
+      end
+    end
+
     context "with existing file" do
       before do
         within_application_directory do
@@ -143,6 +165,29 @@ class Index < Main::View
         expect(output).to include("Created slices/main/templates/users/index.html.erb")
       end
     end
+    it "allows to specify slim template engine" do
+      within_application_directory do
+        fs.mkdir("slices/main")
+        subject.call(name: "users.index", slice: "main", template: "slim")
+
+        template_file = <<~EXPECTED
+          h1 Main::Views::Users::Index
+        EXPECTED
+        expect(fs.read("slices/main/templates/users/index.html.slim")).to eq(template_file)
+      end
+    end
+
+    it "allows to specify HAML template engine" do
+      within_application_directory do
+        fs.mkdir("slices/main")
+        subject.call(name: "users.index", slice: "main", template: "haml")
+
+        template_file = <<~EXPECTED
+          %h1 Main::Views::Users::Index
+        EXPECTED
+        expect(fs.read("slices/main/templates/users/index.html.haml")).to eq(template_file)
+      end
+    end
 
     context "with existing file" do
       before do