diff --git a/package_template.json b/package_template.json
index 290ec35..7eda554 100644
--- a/package_template.json
+++ b/package_template.json
@@ -33,10 +33,10 @@
         "@babel/plugin-transform-runtime": "^7.0.0",
         "@babel/preset-env": "^7.0.0",
         "@babel/runtime": "^7.0.0",
-        "rollup": "^1.0.0",
+        "rollup": "^1.12.0",
         "rollup-plugin-babel": "^4.0.2",
-        "rollup-plugin-commonjs": "^9.1.6",
-        "rollup-plugin-node-resolve": "^4.0.0",
+        "rollup-plugin-commonjs": "^10.0.0",
+        "rollup-plugin-node-resolve": "^5.2.0",
         "rollup-plugin-replace": "^2.0.0",
         "rollup-plugin-svelte": "^5.0.1",
         "rollup-plugin-terser": "^4.0.4"
diff --git a/rollup.config.js b/rollup.config.js
index 0571474..ac0b39b 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -12,6 +12,7 @@ const dev = mode === 'development';
 const legacy = !!process.env.SAPPER_LEGACY_BUILD;
 
 const onwarn = (warning, onwarn) => (warning.code === 'CIRCULAR_DEPENDENCY' && /[/\\]@sapper[/\\]/.test(warning.message)) || onwarn(warning);
+const dedupe = importee => importee === 'svelte' || importee.startsWith('svelte/');
 
 export default {
 	client: {
@@ -28,7 +29,8 @@ export default {
 				emitCss: true
 			}),
 			resolve({
-				browser: true
+				browser: true,
+				dedupe
 			}),
 			commonjs(),
 
@@ -69,7 +71,9 @@ export default {
 				generate: 'ssr',
 				dev
 			}),
-			resolve(),
+			resolve({
+				dedupe
+			}),
 			commonjs()
 		],
 		external: Object.keys(pkg.dependencies).concat(