diff --git a/package.json b/package.json
index 2aa0c7af2..d7c5d1851 100644
--- a/package.json
+++ b/package.json
@@ -64,7 +64,7 @@
     "@types/micromatch": "^3.1.0",
     "@types/node": "*",
     "@types/semver": "^6.0.0",
-    "@types/webpack": "^4.4.30",
+    "@types/webpack": "~4.41.0",
     "babel": "^6.0.0",
     "babel-core": "^6.0.0",
     "babel-loader": "^7.0.0",
@@ -93,7 +93,7 @@
     "tslint": "^5.11.0",
     "tslint-config-prettier": "^1.15.0",
     "typescript": "^3.6.2",
-    "webpack": "^4.5.0",
+    "webpack": "^4.41.4",
     "webpack-cli": "^3.1.1"
   },
   "peerDependencies": {
diff --git a/src/after-compile.ts b/src/after-compile.ts
index 517eb6f64..55e80eb79 100644
--- a/src/after-compile.ts
+++ b/src/after-compile.ts
@@ -39,7 +39,8 @@ export function makeAfterCompile(
       return;
     }
 
-    removeTSLoaderErrors(compilation.errors);
+    // @ts-ignore
+    removeTSLoaderErrors(compilation.getErrors && compilation.getErrors() || compilation.errors);
 
     provideCompilerOptionDiagnosticErrorsToWebpack(
       getCompilerOptionDiagnostics,
@@ -114,8 +115,9 @@ function provideCompilerOptionDiagnosticErrorsToWebpack(
  * based on filepath
  */
 function determineModules(compilation: webpack.compilation.Compilation) {
-  return compilation.modules.reduce<Map<string, WebpackModule[]>>(
-    (modules, module) => {
+  const modules = new Map<string, WebpackModule[]>();
+  compilation.modules.forEach(
+    (module) => {
       if (module.resource) {
         const modulePath = path.normalize(module.resource);
         const existingModules = modules.get(modulePath);
@@ -127,11 +129,9 @@ function determineModules(compilation: webpack.compilation.Compilation) {
           modules.set(modulePath, [module]);
         }
       }
-
-      return modules;
-    },
-    new Map<string, WebpackModule[]>()
+    }
   );
+  return modules;
 }
 
 function determineFilesToCheckForErrors(
@@ -229,7 +229,8 @@ function provideErrorsToWebpack(
     if (associatedModules !== undefined) {
       associatedModules.forEach(module => {
         // remove any existing errors
-        removeTSLoaderErrors(module.errors);
+        // @ts-ignore
+        removeTSLoaderErrors(module.getErrors && module.getErrors() || module.errors);
 
         // append errors
         const formattedErrors = formatErrors(
@@ -287,7 +288,8 @@ function provideSolutionErrorsToWebpack(
     if (associatedModules !== undefined) {
       associatedModules.forEach(module => {
         // remove any existing errors
-        removeTSLoaderErrors(module.errors);
+        // @ts-ignore
+        removeTSLoaderErrors(module.getErrors && module.getErrors() || module.errors);
 
         // append errors
         const formattedErrors = formatErrors(