diff --git a/README.md b/README.md
index 056913e3..2cba49ca 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@ Then, add the following to your `package.json`:
 
 Feel free to change the output path to whatever you like.
 
-Next, the codegen will expect you to have created a file called either `getContentfulEnvironment.js` or `getContentfulEnvironment.ts`
+Next, the codegen will expect you to have created a file called `getContentfulEnvironment.js`, `getContentfulEnvironment.cjs` or `getContentfulEnvironment.ts`
 in the root of your project directory, which should export a promise that resolves with your Contentful environment.
 
 The reason for this is that you can do whatever you like to set up your Contentful Management
diff --git a/src/loadEnvironment.ts b/src/loadEnvironment.ts
index 75c59c2f..9c0df94d 100644
--- a/src/loadEnvironment.ts
+++ b/src/loadEnvironment.ts
@@ -60,6 +60,8 @@ function determineEnvironmentPath() {
 
   if (fs.existsSync(`${pathWithoutExtension}.ts`)) {
     return `${pathWithoutExtension}.ts`
+  } else if (fs.existsSync(`${pathWithoutExtension}.cjs`)) {
+    return `${pathWithoutExtension}.cjs`
   }
 
   return `${pathWithoutExtension}.js`
diff --git a/test/loadEnvironment.test.ts b/test/loadEnvironment.test.ts
index edff61c1..011c75de 100644
--- a/test/loadEnvironment.test.ts
+++ b/test/loadEnvironment.test.ts
@@ -14,6 +14,12 @@ jest.mock(
   { virtual: true },
 )
 
+jest.mock(
+  require("path").resolve(process.cwd(), "./getContentfulEnvironment.cjs"),
+  () => getContentfulEnvironmentFileFactory("cjs"),
+  { virtual: true },
+)
+
 jest.mock(
   require("path").resolve(process.cwd(), "./getContentfulEnvironment.ts"),
   () => getContentfulEnvironmentFileFactory("ts"),
@@ -37,7 +43,9 @@ describe("loadEnvironment", () => {
 
   describe("when getContentfulEnvironment.ts exists", () => {
     beforeEach(() => {
-      jest.spyOn(fs, "existsSync").mockReturnValue(true)
+      jest.spyOn(fs, "existsSync").mockImplementation(path => {
+        return (path as string).endsWith(".ts")
+      })
     })
 
     describe("when ts-node is not found", () => {
@@ -89,6 +97,7 @@ describe("loadEnvironment", () => {
 
       expect(getContentfulEnvironmentFileFactory).toHaveBeenCalledWith("ts")
       expect(getContentfulEnvironmentFileFactory).not.toHaveBeenCalledWith("js")
+      expect(getContentfulEnvironmentFileFactory).not.toHaveBeenCalledWith("cjs")
     })
 
     it("disables the registerer afterwards", async () => {
@@ -98,6 +107,22 @@ describe("loadEnvironment", () => {
     })
   })
 
+  describe("when getContentfulEnvironment.cjs exists", () => {
+    beforeEach(() => {
+      jest.spyOn(fs, "existsSync").mockImplementation(path => {
+        return (path as string).endsWith(".cjs")
+      })
+    })
+
+    it("requires the javascript config on ESM environments", async () => {
+      await loadEnvironment()
+
+      expect(getContentfulEnvironmentFileFactory).toHaveBeenCalledWith("cjs")
+      expect(getContentfulEnvironmentFileFactory).not.toHaveBeenCalledWith("js")
+      expect(getContentfulEnvironmentFileFactory).not.toHaveBeenCalledWith("ts")
+    })
+  })
+
   it("requires the javascript config", async () => {
     jest.spyOn(fs, "existsSync").mockReturnValue(false)
 
@@ -105,5 +130,6 @@ describe("loadEnvironment", () => {
 
     expect(getContentfulEnvironmentFileFactory).toHaveBeenCalledWith("js")
     expect(getContentfulEnvironmentFileFactory).not.toHaveBeenCalledWith("ts")
+    expect(getContentfulEnvironmentFileFactory).not.toHaveBeenCalledWith("cjs")
   })
 })