diff --git a/lib/resolver-compat.js b/lib/resolver-compat.js
index 06cd7e2..9c74ea0 100644
--- a/lib/resolver-compat.js
+++ b/lib/resolver-compat.js
@@ -46,8 +46,8 @@ function makeExternalMatcher(obj) {
 
 class LegacyResolver extends DefaultResolver {
 
-	constructor(builtinModules, checkPath, globalPaths, pathContext, customResolver, hostRequire, compiler, externals, allowTransitive) {
-		super(builtinModules, checkPath, globalPaths, pathContext, customResolver, hostRequire, compiler);
+	constructor(builtinModules, checkPath, globalPaths, pathContext, customResolver, hostRequire, compiler, strict, externals, allowTransitive) {
+		super(builtinModules, checkPath, globalPaths, pathContext, customResolver, hostRequire, compiler, strict);
 		this.externals = externals;
 		this.currMod = undefined;
 		this.trustedMods = new WeakMap();
@@ -282,7 +282,8 @@ function resolverFromOptions(vm, options, override, compiler) {
 		root: rootPaths,
 		resolve: customResolver,
 		customRequire: hostRequire = defaultRequire,
-		context = 'host'
+		context = 'host',
+		strict = true,
 	} = options;
 
 	const builtins = genBuiltinsFromOptions(vm, builtinOpt, mockOpt, override);
@@ -325,7 +326,7 @@ function resolverFromOptions(vm, options, override, compiler) {
 	}
 
 	if (typeof externalOpt !== 'object') {
-		return new DefaultResolver(builtins, checkPath, [], () => context, newCustomResolver, hostRequire, compiler);
+		return new DefaultResolver(builtins, checkPath, [], () => context, newCustomResolver, hostRequire, compiler, strict);
 	}
 
 	let transitive = false;
@@ -336,7 +337,7 @@ function resolverFromOptions(vm, options, override, compiler) {
 		transitive = context === 'sandbox' && externalOpt.transitive;
 	}
 	externals = external.map(makeExternalMatcher);
-	return new LegacyResolver(builtins, checkPath, [], () => context, newCustomResolver, hostRequire, compiler, externals, transitive);
+	return new LegacyResolver(builtins, checkPath, [], () => context, newCustomResolver, hostRequire, compiler, strict, externals, transitive);
 }
 
 exports.resolverFromOptions = resolverFromOptions;
diff --git a/lib/resolver.js b/lib/resolver.js
index 7575463..8ff5eb8 100644
--- a/lib/resolver.js
+++ b/lib/resolver.js
@@ -140,12 +140,13 @@ class Resolver {
 
 class DefaultResolver extends Resolver {
 
-	constructor(builtinModules, checkPath, globalPaths, pathContext, customResolver, hostRequire, compiler) {
+	constructor(builtinModules, checkPath, globalPaths, pathContext, customResolver, hostRequire, compiler, strict) {
 		super(builtinModules, globalPaths, hostRequire);
 		this.checkPath = checkPath;
 		this.pathContext = pathContext;
 		this.customResolver = customResolver;
 		this.compiler = compiler;
+		this.strict = strict;
 		this.packageCache = {__proto__: null};
 		this.scriptCache = {__proto__: null};
 	}
@@ -200,7 +201,7 @@ class DefaultResolver extends Resolver {
 		this.checkAccess(mod, filename);
 		if (this.pathContext(filename, 'js') === 'sandbox') {
 			const script = this.readScript(filename);
-			vm.run(script, {filename, strict: true, module: mod, wrapper: 'none', dirname: mod.path});
+			vm.run(script, {filename, strict: this.strict, module: mod, wrapper: 'none', dirname: mod.path});
 		} else {
 			const m = this.hostRequire(filename);
 			mod.exports = vm.readonly(m);