diff --git a/src/cli.ts b/src/cli.ts
index 6d8f975..170777d 100755
--- a/src/cli.ts
+++ b/src/cli.ts
@@ -83,7 +83,7 @@ yargs
     alias: "c",
     type: "string",
     description: "Optional path to gmrc file",
-    defaultDescription: ".gmrc[.js]",
+    defaultDescription: ".gmrc[.js|.cjs]",
   })
 
   .completion("completion", "Generate shell completion script.")
diff --git a/src/commands/_common.ts b/src/commands/_common.ts
index 971c2dd..95d0436 100644
--- a/src/commands/_common.ts
+++ b/src/commands/_common.ts
@@ -7,6 +7,7 @@ import { Settings } from "../settings";
 
 export const DEFAULT_GMRC_PATH = `${process.cwd()}/.gmrc`;
 export const DEFAULT_GMRCJS_PATH = `${DEFAULT_GMRC_PATH}.js`;
+export const DEFAULT_GMRC_COMMONJS_PATH = `${DEFAULT_GMRC_PATH}.cjs`;
 
 /**
  * Represents the option flags that are valid for all commands (see
@@ -86,7 +87,13 @@ export async function getSettings(options: Options = {}): Promise<Settings> {
       throw new Error(`Failed to import '${configFile}': file not found`);
     }
 
-    if (configFile.endsWith(".js")) {
+    if (configFile.endsWith(".mjs")) {
+      throw new Error(
+        `ES module imports aren't currently supported, change your config extension to .cjs.`,
+      );
+    }
+
+    if (configFile.endsWith(".js") || configFile.endsWith(".cjs")) {
       return tryRequire(configFile);
     } else {
       return await getSettingsFromJSON(configFile);
@@ -95,6 +102,8 @@ export async function getSettings(options: Options = {}): Promise<Settings> {
     return await getSettingsFromJSON(DEFAULT_GMRC_PATH);
   } else if (await exists(DEFAULT_GMRCJS_PATH)) {
     return tryRequire(DEFAULT_GMRCJS_PATH);
+  } else if (await exists(DEFAULT_GMRC_COMMONJS_PATH)) {
+    return tryRequire(DEFAULT_GMRC_COMMONJS_PATH);
   } else {
     throw new Error(
       "No .gmrc file found; please run `graphile-migrate init` first.",