diff --git a/lib/DependenciesBlockVariable.js b/lib/DependenciesBlockVariable.js
index a1a24d184..c4ed91627 100644
--- a/lib/DependenciesBlockVariable.js
+++ b/lib/DependenciesBlockVariable.js
@@ -44,7 +44,7 @@ class DependenciesBlockVariable {
 	 * @returns {ReplaceSource} returns constructed source for expression via templates
 	 */
 	expressionSource(dependencyTemplates, runtimeTemplate) {
-		const source = new ReplaceSource(new RawSource(this.expression), null);
+		const source = new ReplaceSource(new RawSource(this.expression));
 		for (const dep of this.dependencies) {
 			const template = dependencyTemplates.get(dep.constructor);
 			if (!template) {
diff --git a/lib/JavascriptGenerator.js b/lib/JavascriptGenerator.js
index 57197e419..882f7d4d4 100644
--- a/lib/JavascriptGenerator.js
+++ b/lib/JavascriptGenerator.js
@@ -18,7 +18,7 @@ class JavascriptGenerator {
 			return new RawSource("throw new Error('No source available');");
 		}
 
-		const source = new ReplaceSource(originalSource, null);
+		const source = new ReplaceSource(originalSource);
 
 		this.sourceBlock(
 			module,
diff --git a/lib/optimize/ConcatenatedModule.js b/lib/optimize/ConcatenatedModule.js
index 05f06b501..254ae090f 100644
--- a/lib/optimize/ConcatenatedModule.js
+++ b/lib/optimize/ConcatenatedModule.js
@@ -682,7 +682,7 @@ class ConcatenatedModule extends Module {
 				});
 				const globalScope = scopeManager.acquire(ast);
 				const moduleScope = globalScope.childScopes[0];
-				const resultSource = new ReplaceSource(source, null);
+				const resultSource = new ReplaceSource(source);
 				info.ast = ast;
 				info.internalSource = source;
 				info.source = resultSource;
diff --git a/yarn.lock b/yarn.lock
index 128195fd7..69909238e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -27,8 +27,8 @@
     "@types/babel-types" "*"
 
 "@types/node@*":
-  version "10.0.8"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-10.0.8.tgz#37b4d91d4e958e4c2ba0be2b86e7ed4ff19b0858"
+  version "10.5.1"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-10.5.1.tgz#d578446f4abff5c0b49ade9b4e5274f6badaadfc"
 
 "@types/node@^9.6.4":
   version "9.6.15"
@@ -43,8 +43,8 @@
   resolved "https://registry.yarnpkg.com/@types/tapable/-/tapable-1.0.2.tgz#e13182e1b69871a422d7863e11a4a6f5b814a4bd"
 
 "@types/webpack-sources@^0.1.4":
-  version "0.1.4"
-  resolved "https://registry.yarnpkg.com/@types/webpack-sources/-/webpack-sources-0.1.4.tgz#a52f1cec41e4d24b3df0bf87e8a538945f6d493f"
+  version "0.1.5"
+  resolved "https://registry.yarnpkg.com/@types/webpack-sources/-/webpack-sources-0.1.5.tgz#be47c10f783d3d6efe1471ff7f042611bd464a92"
   dependencies:
     "@types/node" "*"
     "@types/source-list-map" "*"