diff --git a/.github/workflows/release-soql-builder-ui.yml b/.github/workflows/release-soql-builder-ui.yml
index f5374ce0..f3b97426 100644
--- a/.github/workflows/release-soql-builder-ui.yml
+++ b/.github/workflows/release-soql-builder-ui.yml
@@ -12,7 +12,7 @@ jobs:
   release-soql-builder-ui:
     runs-on: ubuntu-latest
     steps:
-      - uses: GoogleCloudPlatform/release-please-action@v2
+      - uses: GoogleCloudPlatform/release-please-action@v4
         id: release
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/release-soql-common.yml b/.github/workflows/release-soql-common.yml
index 9b186f1c..746970e5 100644
--- a/.github/workflows/release-soql-common.yml
+++ b/.github/workflows/release-soql-common.yml
@@ -12,7 +12,7 @@ jobs:
   release-soql-common:
     runs-on: ubuntu-latest
     steps:
-      - uses: GoogleCloudPlatform/release-please-action@v2
+      - uses: GoogleCloudPlatform/release-please-action@v4
         id: release
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/release-soql-data-view.yml b/.github/workflows/release-soql-data-view.yml
index 00afde57..82e4f064 100644
--- a/.github/workflows/release-soql-data-view.yml
+++ b/.github/workflows/release-soql-data-view.yml
@@ -12,7 +12,7 @@ jobs:
   release-soql-data-view:
     runs-on: ubuntu-latest
     steps:
-      - uses: GoogleCloudPlatform/release-please-action@v2
+      - uses: GoogleCloudPlatform/release-please-action@v4
         id: release
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/release-soql-model.yml b/.github/workflows/release-soql-model.yml
index 78f6bdaf..51d89611 100644
--- a/.github/workflows/release-soql-model.yml
+++ b/.github/workflows/release-soql-model.yml
@@ -12,7 +12,7 @@ jobs:
   release-soql-model:
     runs-on: ubuntu-latest
     steps:
-      - uses: GoogleCloudPlatform/release-please-action@v2
+      - uses: GoogleCloudPlatform/release-please-action@v4
         id: release
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/packages/soql-builder-ui/.eslintrc.json b/packages/soql-builder-ui/.eslintrc.json
index 4006118f..539c2471 100644
--- a/packages/soql-builder-ui/.eslintrc.json
+++ b/packages/soql-builder-ui/.eslintrc.json
@@ -9,6 +9,12 @@
     "@lwc/lwc/no-async-operation": "off",
     "@lwc/lwc/no-inner-html": "warn",
     "@lwc/lwc/no-document-query": "warn",
-    "no-underscore-dangle": "off"
+    "no-underscore-dangle": "off",
+    "@typescript-eslint/no-unused-vars": [
+      "error",
+      {
+        "varsIgnorePattern": "[api|track]"
+      }
+    ]
   }
 }
diff --git a/packages/soql-builder-ui/package.json b/packages/soql-builder-ui/package.json
index 970eec06..8084aa28 100644
--- a/packages/soql-builder-ui/package.json
+++ b/packages/soql-builder-ui/package.json
@@ -44,7 +44,7 @@
   "license": "BSD-3-Clause",
   "main": "dist/",
   "scripts": {
-    "build": "lwc-services build -w webpack.config.js -m production",
+    "build": "export NODE_OPTIONS=--openssl-legacy-provider && lwc-services build -w webpack.config.js -m production",
     "clean": "shx rm -rf package-lock.json && shx rm -rf dist && shx rm -rf node_modules",
     "publish:lwc": "npm publish .",
     "lint": "eslint ./src",
diff --git a/packages/soql-builder-ui/src/modules/querybuilder/app/app.ts b/packages/soql-builder-ui/src/modules/querybuilder/app/app.ts
index c31cb46e..a4384f03 100644
--- a/packages/soql-builder-ui/src/modules/querybuilder/app/app.ts
+++ b/packages/soql-builder-ui/src/modules/querybuilder/app/app.ts
@@ -7,6 +7,7 @@
  */
 
 import { LightningElement, track } from 'lwc';
+import { JsonMap } from '@salesforce/ts-types';
 import { ToolingSDK } from '../services/toolingSDK';
 import { MessageServiceFactory } from '../services/message/messageServiceFactory';
 
@@ -176,7 +177,7 @@ export default class App extends LightningElement {
   }
 
   /* eslint-disable @typescript-eslint/no-unsafe-assignment,@typescript-eslint/no-unsafe-call,@typescript-eslint/no-unsafe-return*/
-  public inspectUnsupported(unsupported): any {
+  public inspectUnsupported(unsupported: JsonMap[]): any {
     const filteredUnsupported = unsupported
       // this reason is often associated with a parse error, so snuffing it out instead of double notifications
       .filter(
@@ -189,7 +190,7 @@ export default class App extends LightningElement {
     return filteredUnsupported;
   }
   /* ---- SOBJECT HANDLERS ---- */
-  public handleObjectChange(e): void {
+  public handleObjectChange(e: CustomEvent): void {
     const selectedSObjectName = e.detail.selectedSobject;
     this.onSObjectChanged(selectedSObjectName);
     // when triggered by the ui, send message
@@ -204,7 +205,7 @@ export default class App extends LightningElement {
     }
   }
   /* ---- FIELD HANDLERS ---- */
-  public handleFieldSelected(e): void {
+  public handleFieldSelected(e: CustomEvent): void {
     this.modelService.setFields(e.detail.fields);
   }
   public handleFieldSelectAll(): void {
@@ -215,24 +216,24 @@ export default class App extends LightningElement {
   }
 
   /* ---- ORDER BY HANDLERS ---- */
-  public handleOrderBySelected(e): void {
+  public handleOrderBySelected(e: CustomEvent): void {
     this.modelService.addUpdateOrderByField(e.detail);
   }
-  public handleOrderByRemoved(e): void {
+  public handleOrderByRemoved(e: CustomEvent): void {
     this.modelService.removeOrderByField(e.detail.field);
   }
   /* ---- LIMIT HANDLERS ---- */
-  public handleLimitChanged(e): void {
+  public handleLimitChanged(e: CustomEvent): void {
     this.modelService.changeLimit(e.detail.limit);
   }
   /* ---- WHERE HANDLERS ---- */
-  public handleWhereSelection(e): void {
+  public handleWhereSelection(e: CustomEvent): void {
     this.modelService.upsertWhereFieldExpr(e.detail);
   }
-  public handleAndOrSelection(e): void {
+  public handleAndOrSelection(e: CustomEvent): void {
     this.modelService.setAndOr(e.detail);
   }
-  public handleRemoveWhereCondition(e): void {
+  public handleRemoveWhereCondition(e: CustomEvent): void {
     this.modelService.removeWhereFieldCondition(e.detail);
   }
 
diff --git a/packages/soql-builder-ui/src/modules/querybuilder/fields/fields.ts b/packages/soql-builder-ui/src/modules/querybuilder/fields/fields.ts
index ffde57fe..e1b7611d 100644
--- a/packages/soql-builder-ui/src/modules/querybuilder/fields/fields.ts
+++ b/packages/soql-builder-ui/src/modules/querybuilder/fields/fields.ts
@@ -32,7 +32,7 @@ export default class Fields extends LightningElement {
   public selectPlaceHolderText = 'Search fields...'; // TODO: i18n
   public _displayFields: string[];
 
-  public handleFieldSelection(e): void {
+  public handleFieldSelection(e: CustomEvent): void {
     e.preventDefault();
     if (e.detail && e.detail.value) {
       let selection = [];
@@ -62,7 +62,7 @@ export default class Fields extends LightningElement {
     }
   }
 
-  public handleFieldRemoved(e): void {
+  public handleFieldRemoved(e: Event): void {
     e.preventDefault();
     const fieldRemovedEvent = new CustomEvent('fields__selected', {
       detail: {
diff --git a/packages/soql-builder-ui/src/modules/querybuilder/from/from.ts b/packages/soql-builder-ui/src/modules/querybuilder/from/from.ts
index 3a5ae18a..8cfa8d6f 100644
--- a/packages/soql-builder-ui/src/modules/querybuilder/from/from.ts
+++ b/packages/soql-builder-ui/src/modules/querybuilder/from/from.ts
@@ -25,7 +25,7 @@ export default class From extends LightningElement {
   }
 
   /* eslint-disable @typescript-eslint/no-unsafe-member-access,@typescript-eslint/no-unsafe-call,@typescript-eslint/no-unsafe-assignment */
-  public handleSobjectSelection(e): void {
+  public handleSobjectSelection(e: CustomEvent): void {
     e.preventDefault();
     const selectedSobject = e.detail.value;
     if (selectedSobject && selectedSobject.length) {
diff --git a/packages/soql-builder-ui/src/modules/querybuilder/limit/limit.ts b/packages/soql-builder-ui/src/modules/querybuilder/limit/limit.ts
index 237dbea4..03c5984f 100644
--- a/packages/soql-builder-ui/src/modules/querybuilder/limit/limit.ts
+++ b/packages/soql-builder-ui/src/modules/querybuilder/limit/limit.ts
@@ -13,7 +13,7 @@ export default class Limit extends LightningElement {
   @api public limit;
 
   /* eslint-disable @typescript-eslint/no-unsafe-assignment,@typescript-eslint/no-unsafe-call,@typescript-eslint/no-unsafe-member-access */
-  public handleLimitChange(e): void {
+  public handleLimitChange(e: Event): void {
     e.preventDefault();
     const limit = e.target.value;
     const sObjectSelected = new CustomEvent('limit__changed', {
diff --git a/packages/soql-builder-ui/src/modules/querybuilder/orderBy/orderBy.ts b/packages/soql-builder-ui/src/modules/querybuilder/orderBy/orderBy.ts
index 0729f6eb..dbe719a4 100644
--- a/packages/soql-builder-ui/src/modules/querybuilder/orderBy/orderBy.ts
+++ b/packages/soql-builder-ui/src/modules/querybuilder/orderBy/orderBy.ts
@@ -21,7 +21,7 @@ export default class OrderBy extends LightningElement {
   }
 
   /* eslint-disable @typescript-eslint/no-unsafe-member-access,@typescript-eslint/no-unsafe-call,@typescript-eslint/no-unsafe-assignment */
-  public handleOrderBySelected(e): void {
+  public handleOrderBySelected(e: Event): void {
     e.preventDefault();
     const orderbyFieldEl = this.template.querySelector(
       'querybuilder-custom-select'
@@ -44,7 +44,7 @@ export default class OrderBy extends LightningElement {
     }
   }
 
-  public handleOrderByRemoved(e): void {
+  public handleOrderByRemoved(e: Event): void {
     e.preventDefault();
     const orderByRemovedEvent = new CustomEvent('orderby__removed', {
       detail: { field: e.target.dataset.field }
diff --git a/packages/soql-builder-ui/src/modules/querybuilder/where/where.ts b/packages/soql-builder-ui/src/modules/querybuilder/where/where.ts
index 23aca9fc..7e7d85ce 100644
--- a/packages/soql-builder-ui/src/modules/querybuilder/where/where.ts
+++ b/packages/soql-builder-ui/src/modules/querybuilder/where/where.ts
@@ -129,7 +129,7 @@ export default class Where extends LightningElement {
     }
   }
 
-  public handleModifierGroupSelection(e): void {
+  public handleModifierGroupSelection(e: Event): void {
     e.preventDefault();
     // eslint-disable-next-line camelcase
     const where__group_selectionEvent = new CustomEvent(
diff --git a/packages/soql-builder-ui/src/modules/querybuilder/whereModifierGroup/whereModifierGroup.test.ts b/packages/soql-builder-ui/src/modules/querybuilder/whereModifierGroup/whereModifierGroup.test.ts
index a3326708..dc4c2fb0 100644
--- a/packages/soql-builder-ui/src/modules/querybuilder/whereModifierGroup/whereModifierGroup.test.ts
+++ b/packages/soql-builder-ui/src/modules/querybuilder/whereModifierGroup/whereModifierGroup.test.ts
@@ -1,4 +1,5 @@
 /* eslint-disable @lwc/lwc/prefer-custom-event */
+/* eslint-disable @lwc/lwc/no-inner-html */
 /* eslint-disable no-console */
 /* eslint-disable @typescript-eslint/no-unsafe-return */
 /* eslint-disable @typescript-eslint/no-unsafe-member-access */
diff --git a/packages/soql-builder-ui/tsconfig.json b/packages/soql-builder-ui/tsconfig.json
index e69de29b..0967ef42 100644
--- a/packages/soql-builder-ui/tsconfig.json
+++ b/packages/soql-builder-ui/tsconfig.json
@@ -0,0 +1 @@
+{}
diff --git a/packages/soql-model/src/validators/stringValidator.test.ts b/packages/soql-model/src/validators/stringValidator.test.ts
index ef787fae..670194da 100644
--- a/packages/soql-model/src/validators/stringValidator.test.ts
+++ b/packages/soql-model/src/validators/stringValidator.test.ts
@@ -13,12 +13,20 @@ describe('StringValidator should', () => {
   const validator = new StringValidator({ type: SObjectFieldType.String });
   const validResult = { isValid: true };
   const notValidResult = { isValid: false, message: Messages.error_fieldInput_string };
+
   it('return valid result for string in single quotes', () => {
     expect(validator.validate("'foo'")).toEqual(validResult);
   });
+
+  it('return valid result when user input is NULL or null', () => {
+    expect(validator.validate("'null'")).toEqual(validResult);
+    expect(validator.validate("'NULL'")).toEqual(validResult);
+  });
+
   it('return not valid result for non-string value', () => {
     expect(validator.validate('foo')).toEqual(notValidResult);
   });
+
   it('return not valid result for string ending in escaped quote', () => {
     expect(validator.validate("'foo\\'")).toEqual(notValidResult);
   });
diff --git a/packages/soql-model/src/validators/stringValidator.ts b/packages/soql-model/src/validators/stringValidator.ts
index 966072ae..6d0f356c 100644
--- a/packages/soql-model/src/validators/stringValidator.ts
+++ b/packages/soql-model/src/validators/stringValidator.ts
@@ -10,10 +10,11 @@ import { ValidateResult, Validator } from './validator';
 export class StringValidator extends Validator {
   public validate(input: string): ValidateResult {
     const isValid =
-      input.length >= 2 &&
-      input.startsWith("'") &&
-      input.endsWith("'") &&
-      !this.isEscaped(input.substring(1, input.length - 1));
+      (input.length >= 2 &&
+        input.startsWith("'") &&
+        input.endsWith("'") &&
+        !this.isEscaped(input.substring(1, input.length - 1))) ||
+      input.toLowerCase() === 'null';
     const message = isValid ? undefined : Messages.error_fieldInput_string;
     return { isValid, message };
   }