diff --git a/package.json b/package.json
index 94b834d8..1a81d421 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
     "name": "systemverilog",
     "displayName": "SystemVerilog - Language Support",
     "description": "Language support for Verilog and SystemVerilog.",
-    "version": "0.13.9",
+    "version": "0.13.10",
     "publisher": "eirikpre",
     "author": {
         "name": "Eirik Prestegårdshus",
@@ -538,6 +538,40 @@
                     }
                 ]
             },
+            {
+                "name": "verilator-error-v5",
+                "owner": "Verilator",
+                "source": "systemverilog",
+                "severity": "error",
+                "fileLocation": "autoDetect",
+                "pattern": [
+                    {
+                        "regexp": "%Error(-[A-Z0-9]+)?: ((\\S+((\\.sv)|(\\.v))):(\\d+):((\\d+):)? )?(.*)$",
+                        "severity": 1,
+                        "file": 3,
+                        "line": 7,
+                        "column": 9,
+                        "message": 10
+                    }
+                ]
+            },
+            {
+                "name": "verilator-warning-v5",
+                "owner": "Verilator",
+                "source": "systemverilog",
+                "severity": "warning",
+                "fileLocation": "autoDetect",
+                "pattern": [
+                    {
+                        "regexp": "%Warning(-[A-Z0-9]+)?: ((\\S+((\\.sv)|(\\.v))):(\\d+):((\\d+):)? )?(.*)$",
+                        "severity": 1,
+                        "file": 3,
+                        "line": 7,
+                        "column": 9,
+                        "message": 10
+                    }
+                ]
+            },
             {
                 "name": "verible-error",
                 "owner": "Verible",
diff --git a/src/compiling/DocumentCompiler.ts b/src/compiling/DocumentCompiler.ts
index 520f1535..981c0f5d 100644
--- a/src/compiling/DocumentCompiler.ts
+++ b/src/compiling/DocumentCompiler.ts
@@ -4,7 +4,7 @@ import { URI } from 'vscode-uri';
 import * as path from 'path';
 import * as child from 'child_process';
 import { getPathFromUri } from '../utils/common';
-import { isSystemVerilogDocument, isVerilogDocument, getLineRange } from '../utils/server';
+import { isSystemVerilogDocument, isVerilogDocument, isVerilogAMSDocument, getLineRange } from '../utils/server';
 import { DiagnosticData } from './DiagnosticData';
 
 /* 
@@ -45,7 +45,7 @@ export abstract class DocumentCompiler {
                 return;
             }
 
-            if (!isSystemVerilogDocument(document) && !isVerilogDocument(document)) {
+            if (!isSystemVerilogDocument(document) && !isVerilogDocument(document) && !isVerilogAMSDocument(document)) {
                 reject(new Error('The document is not a SystemVerilog/Verilog file.'));
                 return;
             }
diff --git a/src/extension.ts b/src/extension.ts
index b9f159af..4b145f62 100644
--- a/src/extension.ts
+++ b/src/extension.ts
@@ -20,7 +20,11 @@ let closeWindowProgress = true;
 
 const selector: DocumentSelector = [
     { scheme: 'file', language: 'systemverilog' },
-    { scheme: 'file', language: 'verilog' }
+    { scheme: 'file', language: 'systemverilogheader' },
+    { scheme: 'file', language: 'verilog' },
+    { scheme: 'file', language: 'verilogheader' },
+    { scheme: 'file', language: 'veriloga' },
+    { scheme: 'file', language: 'verilogams' }
 ];
 
 let indexer: SystemVerilogIndexer | undefined = undefined;
diff --git a/src/indexer.ts b/src/indexer.ts
index 757c0a94..38f41011 100644
--- a/src/indexer.ts
+++ b/src/indexer.ts
@@ -3,7 +3,7 @@ import { CancellationToken } from 'vscode-languageclient/node';
 import * as glob from 'glob';
 import * as minimatch from 'minimatch';
 import { SystemVerilogParser } from './parser';
-import { isSystemVerilogDocument, isVerilogDocument } from './utils/client';
+import { isSystemVerilogDocument, isVerilogDocument, isVerilogAMSDocument } from './utils/client';
 import { SystemVerilogSymbol } from './symbol';
 
 export class SystemVerilogIndexer {
@@ -136,7 +136,7 @@ export class SystemVerilogIndexer {
                     if (total_files >= 100 * this.parallelProcessing) {
                         return this.parser.get_all_recursive(doc, 'declaration', 0);
                     }
-                    if (doc.lineCount > this.maxLineCountIndexing) {
+                    if (doc.lineCount > this.maxLineCountIndexing.valueOf()) {
                         window.showInformationMessage(
                             `The character count of ${workspace.asRelativePath(uri)} is larger than ${this.maxLineCountIndexing}. Falling back to fast parse. To fully parse this file, please set 'systemverilog.maxLineCountIndexing > ${doc.lineCount} in the systemverilog extension settings.`
                         ); // prettier-ignore
@@ -182,7 +182,7 @@ export class SystemVerilogIndexer {
     */
     public async onChange(document: TextDocument): Promise<any> {
         return new Promise(() => {
-            if (!isSystemVerilogDocument(document) && !isVerilogDocument(document)) {
+            if (!isSystemVerilogDocument(document) && !isVerilogDocument(document) && !isVerilogAMSDocument(document)) {
                 return;
             }
             if (!workspace.getConfiguration().get('systemverilog.enableIncrementalIndexing')) {
@@ -237,7 +237,7 @@ export class SystemVerilogIndexer {
                 return;
             }
 
-            if (!isSystemVerilogDocument(document) && !isVerilogDocument(document)) {
+            if (!isSystemVerilogDocument(document) && !isVerilogDocument(document) && !isVerilogAMSDocument(document)) {
                 resolve(new Array<SystemVerilogSymbol>());
                 return;
             }
diff --git a/src/utils/client.ts b/src/utils/client.ts
index baf53e52..36116471 100644
--- a/src/utils/client.ts
+++ b/src/utils/client.ts
@@ -7,7 +7,7 @@ import { TextDocument } from 'vscode';
     @return true if the document is a SystemVerilog file
 */
 export function isSystemVerilogDocument(document: TextDocument | undefined): boolean {
-    return document?.languageId === 'systemverilog';
+    return document?.languageId === 'systemverilog' || document?.languageId === 'systemverilogheader';
 }
 
 /**
@@ -17,5 +17,15 @@ export function isSystemVerilogDocument(document: TextDocument | undefined): boo
     @return true if the document is a Verilog file
 */
 export function isVerilogDocument(document: TextDocument | undefined): boolean {
-    return document?.languageId === 'verilog';
+    return document?.languageId === 'verilog' || document?.languageId === 'verilogheader';
+}
+
+/**
+    Check if a given `document` is a VerilogA/VerilogAMS file.
+
+    @param document the document to check
+    @return true if the document is a Verilog file
+*/
+export function isVerilogAMSDocument(document: TextDocument | undefined): boolean {
+    return document?.languageId === 'veriloga' || document?.languageId === 'verilogams';
 }
diff --git a/src/utils/server.ts b/src/utils/server.ts
index c468c05f..d7d8dcfe 100644
--- a/src/utils/server.ts
+++ b/src/utils/server.ts
@@ -8,7 +8,7 @@ import { TextDocument } from 'vscode-languageserver-textdocument';
     @return true if the document is a SystemVerilog file
 */
 export function isSystemVerilogDocument(document: TextDocument | undefined): boolean {
-    return document?.languageId === 'systemverilog';
+    return document?.languageId === 'systemverilog' || document?.languageId === 'systemverilogheader';
 }
 
 /**
@@ -18,7 +18,17 @@ export function isSystemVerilogDocument(document: TextDocument | undefined): boo
     @return true if the document is a Verilog file
 */
 export function isVerilogDocument(document: TextDocument | undefined): boolean {
-    return document?.languageId === 'verilog';
+    return document?.languageId === 'verilog' || document?.languageId === 'verilogheader';
+}
+
+/**
+    Check if a given `document` is a Verilog file.
+
+    @param document the document to check
+    @return true if the document is a Verilog file
+*/
+export function isVerilogAMSDocument(document: TextDocument | undefined): boolean {
+    return document?.languageId === 'veriloga' || document?.languageId === 'verilogams';
 }
 
 /**