diff --git a/package.json b/package.json
index 4b525705..9d7d8454 100644
--- a/package.json
+++ b/package.json
@@ -90,7 +90,8 @@
   ],
   "icon": "images/icon-apollo-blue-400x400.png",
   "activationEvents": [
-    "workspaceContains:**/apollo.config.[jt]s"
+    "workspaceContains:**/apollo.config.[jt]s",
+    "workspaceContains:**/apollo.config.cjs"
   ],
   "contributes": {
     "configuration": {
diff --git a/src/language-server/config/loadConfig.ts b/src/language-server/config/loadConfig.ts
index dd0725fb..852f51bb 100644
--- a/src/language-server/config/loadConfig.ts
+++ b/src/language-server/config/loadConfig.ts
@@ -22,6 +22,7 @@ const defaultFileNames = [
   "package.json",
   `${MODULE_NAME}.config.js`,
   `${MODULE_NAME}.config.ts`,
+  `${MODULE_NAME}.config.cjs`
 ];
 const envFileNames = [".env", ".env.local"];
 
@@ -29,6 +30,7 @@ const loaders = {
   // XXX improve types for config
   ".json": (cosmiconfig as any).loadJson as LoaderEntry,
   ".js": (cosmiconfig as any).loadJs as LoaderEntry,
+  ".cjs": (cosmiconfig as any).loadJs as LoaderEntry,
   ".ts": {
     async: TypeScriptLoader,
   },
diff --git a/src/language-server/project/base.ts b/src/language-server/project/base.ts
index f57955f7..4bdf5cb0 100644
--- a/src/language-server/project/base.ts
+++ b/src/language-server/project/base.ts
@@ -102,7 +102,7 @@ export abstract class GraphQLProject implements GraphQLSchemaProvider {
       : config.service;
     const fileSet = new FileSet({
       rootURI: this.rootURI,
-      includes: [...includes, ".env", "apollo.config.js"],
+      includes: [...includes, ".env", "apollo.config.js", "apollo.config.cjs"],
       // We do not want to include the local schema file in our list of documents
       excludes: [...excludes, ...this.getRelativeLocalSchemaFilePaths()],
       configURI: config.configURI,
diff --git a/src/language-server/server.ts b/src/language-server/server.ts
index b68ed081..f912b718 100644
--- a/src/language-server/server.ts
+++ b/src/language-server/server.ts
@@ -132,7 +132,7 @@ documents.onDidChangeContent(
 
 connection.onDidChangeWatchedFiles((params) => {
   for (const { uri, type } of params.changes) {
-    if (uri.endsWith("apollo.config.js") || uri.endsWith(".env")) {
+    if (uri.endsWith("apollo.config.js") || uri.endsWith("apollo.config.cjs") || uri.endsWith(".env")) {
       workspace.reloadProjectForConfig(uri);
     }
 
diff --git a/src/language-server/workspace.ts b/src/language-server/workspace.ts
index a972fff5..e6e25ff9 100644
--- a/src/language-server/workspace.ts
+++ b/src/language-server/workspace.ts
@@ -114,7 +114,7 @@ export class GraphQLWorkspace {
         -- ~/:user/server (GraphQLProject) as WorkspaceFolder
 
     */
-    const apolloConfigFiles: string[] = fg.sync("**/apollo.config.@(js|ts)", {
+    const apolloConfigFiles: string[] = fg.sync("**/apollo.config.@(js|ts|cjs)", {
       cwd: URI.parse(folder.uri).fsPath,
       absolute: true,
       ignore: "**/node_modules/**",