diff --git a/packages/docusaurus-theme-search-algolia/src/__tests__/validateThemeConfig.test.js b/packages/docusaurus-theme-search-algolia/src/__tests__/validateThemeConfig.test.js
index cb842e823352..f9b53c5f2eb2 100644
--- a/packages/docusaurus-theme-search-algolia/src/__tests__/validateThemeConfig.test.js
+++ b/packages/docusaurus-theme-search-algolia/src/__tests__/validateThemeConfig.test.js
@@ -88,4 +88,50 @@ describe('validateThemeConfig', () => {
       testValidateThemeConfig({algolia}),
     ).toThrowErrorMatchingInlineSnapshot(`"\\"algolia.apiKey\\" is required"`);
   });
+
+  test('contextualSearch config', () => {
+    const algolia = {
+      indexName: 'index',
+      apiKey: 'apiKey',
+      contextualSearch: true,
+    };
+    expect(testValidateThemeConfig({algolia})).toEqual({
+      algolia: {
+        ...DEFAULT_CONFIG,
+        ...algolia,
+      },
+    });
+  });
+
+  test('searchParameters.facetFilters search config', () => {
+    const algolia = {
+      indexName: 'index',
+      apiKey: 'apiKey',
+      searchParameters: {
+        facetFilters: ['version:1.0'],
+      },
+    };
+    expect(testValidateThemeConfig({algolia})).toEqual({
+      algolia: {
+        ...DEFAULT_CONFIG,
+        ...algolia,
+      },
+    });
+  });
+
+  test('contextualSearch + searchParameters.facetFilters config', () => {
+    const algolia = {
+      indexName: 'index',
+      apiKey: 'apiKey',
+      contextualSearch: true,
+      searchParameters: {
+        facetFilters: ['version:1.0'],
+      },
+    };
+    expect(() =>
+      testValidateThemeConfig({algolia}),
+    ).toThrowErrorMatchingInlineSnapshot(
+      `"If you are using algolia.contextualSearch: true, you should not provide algolia.searchParameters.facetFilters, as it is computed for you dynamically"`,
+    );
+  });
 });
diff --git a/packages/docusaurus-theme-search-algolia/src/validateThemeConfig.js b/packages/docusaurus-theme-search-algolia/src/validateThemeConfig.js
index f9fae1356684..df83366227e8 100644
--- a/packages/docusaurus-theme-search-algolia/src/validateThemeConfig.js
+++ b/packages/docusaurus-theme-search-algolia/src/validateThemeConfig.js
@@ -8,22 +8,28 @@
 const Joi = require('@hapi/joi');
 
 const DEFAULT_CONFIG = {
+  contextualSearch: false, // future: maybe we want to enable this by default
+
   // By default, all Docusaurus sites are using the same AppId
   // This has been designed on purpose with Algolia.
   appId: 'BH4D9OD16A',
+
+  searchParameters: {},
 };
 exports.DEFAULT_CONFIG = DEFAULT_CONFIG;
 
 const Schema = Joi.object({
   algolia: Joi.object({
     // Docusaurus attributes
-    contextualSearch: Joi.boolean().default(false),
+    contextualSearch: Joi.boolean().default(DEFAULT_CONFIG.contextualSearch),
 
     // Algolia attributes
     appId: Joi.string().default(DEFAULT_CONFIG.appId),
     apiKey: Joi.string().required(),
     indexName: Joi.string().required(),
-    searchParameters: Joi.object().default({}).unknown(),
+    searchParameters: Joi.object()
+      .default(DEFAULT_CONFIG.searchParameters)
+      .unknown(),
   })
     .label('themeConfig.algolia')
     .required()