diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9569b4ff7b..8ed9b5a3c2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Svelte changelog
 
+## Unreleased
+
+* Support `use:obj.method` as actions ([#3935](https://github.com/sveltejs/svelte/issues/3935))
+* Support `_` as numeric separator ([#5407](https://github.com/sveltejs/svelte/issues/5407))
+* Fix assignments to properties on store values ([#5412](https://github.com/sveltejs/svelte/issues/5412))
+* Support `import.meta` in template expressions ([#5422](https://github.com/sveltejs/svelte/issues/5422))
+
 ## 3.25.1
 
 * Fix specificity of certain styles involving a child selector ([#4795](https://github.com/sveltejs/svelte/issues/4795))
diff --git a/package-lock.json b/package-lock.json
index d1ec8d275f..2e2a95b362 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -315,9 +315,9 @@
       "dev": true
     },
     "acorn": {
-      "version": "7.3.1",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.3.1.tgz",
-      "integrity": "sha512-tLc0wSnatxAQHVHUapaHdz72pi9KUyHjq5KyHjGg9Y8Ifdc79pTh2XvI6I1/chZbnM7QtNKzh66ooDogPZSleA==",
+      "version": "7.4.0",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.4.0.tgz",
+      "integrity": "sha512-+G7P8jJmCHr+S+cLfQxygbWhXy+8YTVGzAkpEbcLo2mLoL7tij/VG41QSHACSf5QgYRhMZYHuNc6drJaO0Da+w==",
       "dev": true
     },
     "acorn-globals": {
diff --git a/package.json b/package.json
index 20325b4fbf..7ebb41fdfb 100644
--- a/package.json
+++ b/package.json
@@ -68,7 +68,7 @@
     "@types/node": "^8.10.53",
     "@typescript-eslint/eslint-plugin": "^3.0.2",
     "@typescript-eslint/parser": "^3.0.2",
-    "acorn": "^7.3.1",
+    "acorn": "^7.4.0",
     "agadoo": "^1.1.0",
     "c8": "^5.0.1",
     "code-red": "^0.1.3",
diff --git a/src/compiler/compile/nodes/shared/Expression.ts b/src/compiler/compile/nodes/shared/Expression.ts
index bbbc1b2f2d..834287bb63 100644
--- a/src/compiler/compile/nodes/shared/Expression.ts
+++ b/src/compiler/compile/nodes/shared/Expression.ts
@@ -64,6 +64,8 @@ export default class Expression {
 			enter(node: any, parent: any, key: string) {
 				// don't manipulate shorthand props twice
 				if (key === 'value' && parent.shorthand) return;
+				// don't manipulate `import.meta`, `new.target`
+				if (node.type === 'MetaProperty') return this.skip();
 
 				if (map.has(node)) {
 					scope = map.get(node);
diff --git a/src/compiler/compile/render_dom/invalidate.ts b/src/compiler/compile/render_dom/invalidate.ts
index c7d9759ccd..b045db079f 100644
--- a/src/compiler/compile/render_dom/invalidate.ts
+++ b/src/compiler/compile/render_dom/invalidate.ts
@@ -62,7 +62,7 @@ export function invalidate(renderer: Renderer, scope: Scope, node: Node, names:
 			}
 
 			let invalidate = is_store_value
-				? x`@set_store_value(${head.name.slice(1)}, ${node}, ${extra_args})`
+				? x`@set_store_value(${head.name.slice(1)}, ${node}, ${head.name})`
 				: !main_execution_context
 					? x`$$invalidate(${renderer.context_lookup.get(head.name).index}, ${node}, ${extra_args})`
 					: extra_args.length
diff --git a/src/compiler/compile/render_dom/wrappers/shared/add_actions.ts b/src/compiler/compile/render_dom/wrappers/shared/add_actions.ts
index 3d8c4fbbc0..6ca7de9a22 100644
--- a/src/compiler/compile/render_dom/wrappers/shared/add_actions.ts
+++ b/src/compiler/compile/render_dom/wrappers/shared/add_actions.ts
@@ -26,11 +26,19 @@ export function add_action(block: Block, target: string, action: Action) {
 
 	block.add_variable(id);
 
-	const fn = block.renderer.reference(action.name);
+	const [obj, ...properties] = action.name.split('.');
 
-	block.event_listeners.push(
-		x`@action_destroyer(${id} = ${fn}.call(null, ${target}, ${snippet}))`
-	);
+	const fn = block.renderer.reference(obj);
+
+	if (properties.length) {
+		block.event_listeners.push(
+			x`@action_destroyer(${id} = ${fn}.${properties.join('.')}(${target}, ${snippet}))`
+		);
+	} else {
+		block.event_listeners.push(
+			x`@action_destroyer(${id} = ${fn}.call(null, ${target}, ${snippet}))`
+		);
+	}
 
 	if (dependencies && dependencies.length > 0) {
 		let condition = x`${id} && @is_function(${id}.update)`;
diff --git a/src/compiler/parse/acorn.ts b/src/compiler/parse/acorn.ts
index d14721cdab..58031c1a1c 100644
--- a/src/compiler/parse/acorn.ts
+++ b/src/compiler/parse/acorn.ts
@@ -3,11 +3,12 @@ import * as code_red from 'code-red';
 
 export const parse = (source: string): Node => code_red.parse(source, {
 	sourceType: 'module',
-	ecmaVersion: 11,
+	ecmaVersion: 12,
 	locations: true
 });
 
 export const parse_expression_at = (source: string, index: number): Node => code_red.parseExpressionAt(source, index, {
-	ecmaVersion: 11,
+	sourceType: 'module',
+	ecmaVersion: 12,
 	locations: true
 });
\ No newline at end of file
diff --git a/test/js/samples/import-meta/expected.js b/test/js/samples/import-meta/expected.js
new file mode 100644
index 0000000000..ba77398321
--- /dev/null
+++ b/test/js/samples/import-meta/expected.js
@@ -0,0 +1,53 @@
+/* generated by Svelte vX.Y.Z */
+import {
+	SvelteComponent,
+	detach,
+	init,
+	insert,
+	noop,
+	safe_not_equal,
+	space,
+	text
+} from "svelte/internal";
+
+function create_fragment(ctx) {
+	let t0;
+	let t1;
+	let t2_value = import.meta.url + "";
+	let t2;
+
+	return {
+		c() {
+			t0 = text(/*url*/ ctx[0]);
+			t1 = space();
+			t2 = text(t2_value);
+		},
+		m(target, anchor) {
+			insert(target, t0, anchor);
+			insert(target, t1, anchor);
+			insert(target, t2, anchor);
+		},
+		p: noop,
+		i: noop,
+		o: noop,
+		d(detaching) {
+			if (detaching) detach(t0);
+			if (detaching) detach(t1);
+			if (detaching) detach(t2);
+		}
+	};
+}
+
+function instance($$self) {
+	const url = import.meta.url;
+	return [url];
+}
+
+class Component extends SvelteComponent {
+	constructor(options) {
+		super();
+		init(this, options, instance, create_fragment, safe_not_equal, {});
+	}
+}
+
+export default Component;
\ No newline at end of file
diff --git a/test/js/samples/import-meta/input.svelte b/test/js/samples/import-meta/input.svelte
new file mode 100644
index 0000000000..a5ce32dd77
--- /dev/null
+++ b/test/js/samples/import-meta/input.svelte
@@ -0,0 +1,6 @@
+<script>
+	const url = import.meta.url;
+</script>
+
+{url}
+{import.meta.url}
diff --git a/test/runtime/samples/action-object/_config.js b/test/runtime/samples/action-object/_config.js
new file mode 100644
index 0000000000..7fdc11af2b
--- /dev/null
+++ b/test/runtime/samples/action-object/_config.js
@@ -0,0 +1,8 @@
+export default {
+	html: `
+		<button>action</button>
+	`,
+	async test({ assert, target, window }) {
+		assert.equal(target.querySelector('button').foo, 'bar1337');
+	}
+};
diff --git a/test/runtime/samples/action-object/main.svelte b/test/runtime/samples/action-object/main.svelte
new file mode 100644
index 0000000000..f15e319e6f
--- /dev/null
+++ b/test/runtime/samples/action-object/main.svelte
@@ -0,0 +1,10 @@
+<script>
+	const obj = {
+		foo : "bar",
+		action(element, { leet }) {
+			element.foo = this.foo + leet;
+		},
+	}
+</script>
+
+<button use:obj.action={{ leet: 1337 }}>action</button>
\ No newline at end of file
diff --git a/test/runtime/samples/numeric-seperator/_config.js b/test/runtime/samples/numeric-seperator/_config.js
new file mode 100644
index 0000000000..bc6d7c04f3
--- /dev/null
+++ b/test/runtime/samples/numeric-seperator/_config.js
@@ -0,0 +1,3 @@
+export default {
+	html: `2048 2048`
+};
diff --git a/test/runtime/samples/numeric-seperator/main.svelte b/test/runtime/samples/numeric-seperator/main.svelte
new file mode 100644
index 0000000000..e491b8a107
--- /dev/null
+++ b/test/runtime/samples/numeric-seperator/main.svelte
@@ -0,0 +1,5 @@
+<script>
+	const num = 2_048;
+</script>
+
+{num} {2_048}
\ No newline at end of file
diff --git a/test/runtime/samples/store-assignment-updates-property/_config.js b/test/runtime/samples/store-assignment-updates-property/_config.js
new file mode 100644
index 0000000000..65df38f9e4
--- /dev/null
+++ b/test/runtime/samples/store-assignment-updates-property/_config.js
@@ -0,0 +1,32 @@
+export default {
+	html: `
+		<p>a: {"foo":3,"bar":2}</p>
+		<p>b: {"foo":3}</p>
+		<button></button>
+		<button></button>
+	`,
+	skip_if_ssr: true,
+
+	async test({ assert, component, target, window }) {
+		const [btn1, btn2] = target.querySelectorAll('button');
+		const click = new window.MouseEvent('click');
+
+		await btn1.dispatchEvent(click);
+
+		assert.htmlEqual(target.innerHTML, `
+			<p>a: {"foo":4,"bar":2}</p>
+			<p>b: {"foo":4,"baz":0}</p>
+			<button></button>
+			<button></button>
+		`);
+
+		await btn2.dispatchEvent(click);
+
+		assert.htmlEqual(target.innerHTML, `
+			<p>a: {"foo":5,"bar":2}</p>
+			<p>b: {"foo":5,"qux":0}</p>
+			<button></button>
+			<button></button>
+		`);
+	}
+};
\ No newline at end of file
diff --git a/test/runtime/samples/store-assignment-updates-property/main.svelte b/test/runtime/samples/store-assignment-updates-property/main.svelte
new file mode 100644
index 0000000000..c3196a278c
--- /dev/null
+++ b/test/runtime/samples/store-assignment-updates-property/main.svelte
@@ -0,0 +1,24 @@
+<script>
+	import { writable } from '../../../../store';
+
+	const a = writable({ foo: 1, bar: 2 });
+	$a.foo = 3;
+
+	const b = writable({ foo: 1, bar: 2 });
+	$b = { foo: 3 };
+
+	function update() {
+		$a.foo = $a.foo + 1;
+		$b = { foo: $b.foo + 1, qux: 0 };
+	}
+</script>
+
+<p>a: {JSON.stringify($a)}</p>
+<p>b: {JSON.stringify($b)}</p>
+
+<button on:click={() => {
+	$a.foo = $a.foo + 1;
+	$b = { foo: $b.foo + 1, baz: 0 };
+}} />
+
+<button on:click={update} />
\ No newline at end of file
diff --git a/test/validator/samples/import-meta/errors.json b/test/validator/samples/import-meta/errors.json
new file mode 100644
index 0000000000..0637a088a0
--- /dev/null
+++ b/test/validator/samples/import-meta/errors.json
@@ -0,0 +1 @@
+[]
\ No newline at end of file
diff --git a/test/validator/samples/import-meta/input.svelte b/test/validator/samples/import-meta/input.svelte
new file mode 100644
index 0000000000..a5ce32dd77
--- /dev/null
+++ b/test/validator/samples/import-meta/input.svelte
@@ -0,0 +1,6 @@
+<script>
+	const url = import.meta.url;
+</script>
+
+{url}
+{import.meta.url}