diff --git a/README.md b/README.md
index e8b8702e6b..45438b80f5 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,6 @@ Web Interface for Mailbox.
 docker run --env AWS_ACCESS_KEY_ID=<AWS_ACCESS_KEY_ID> \
            --env AWS_SECRET_ACCESS_KEY=<AWS_SECRET_ACCESS_KEY> \
            --env AWS_REGION=<AWS_REGION> \
-           ---env AWS_API_ID=<AWS_API_ID> \
            --env AWS_API_GATEWAY_ENDPOINT=<AWS_API_GATEWAY_ENDPOINT> \
            harryzcy/mailbox-browser
 ```
@@ -40,7 +39,6 @@ During runtime:
 - `AWS_ACCESS_KEY_ID`: AWS access key id
 - `AWS_SECRET_ACCESS_KEY`: AWS secret access key
 - `AWS_REGION`: AWS region code
-- `AWS_API_ID`: AWS API Gateway ID
 - `AWS_API_GATEWAY_ENDPOINT`: AWS API Gateway endpoint
 - `EMAIL_ADDRESSES`: a comma-separated list of email addresses/domains to send email from (required for replying emails)
 - `PROXY_ENABLE` (optional): whether to proxy email images, must be `true` (default) or `false`
diff --git a/bff/config/config.go b/bff/config/config.go
index c86a4e501f..ff2738a24b 100644
--- a/bff/config/config.go
+++ b/bff/config/config.go
@@ -17,7 +17,6 @@ var (
 	AWSRegion             string
 	AWSAccessKeyID        string
 	AWSSecretAccessKey    string
-	AWSAPIID              string
 	AWSAPIGatewayEndpoint string
 
 	EmailAddresses []string
@@ -75,7 +74,6 @@ func load(logger *zap.Logger) error {
 	AWSAccessKeyID = getString(v, "aws.accessKeyID", "AWS_ACCESS_KEY_ID")
 	AWSSecretAccessKey = getString(v, "aws.secretAccessKey", "AWS_SECRET_ACCESS_KEY")
 	AWSAPIGatewayEndpoint = strings.TrimSuffix(getString(v, "aws.apiGateway.endpoint", "AWS_API_GATEWAY_ENDPOINT"), "/")
-	AWSAPIID = getString(v, "aws.apiGateway.apiID", "AWS_API_ID")
 
 	// comma separated list of email addresses or domains, required for email replies
 	EmailAddresses = strings.Split(getString(v, "email.addresses", "EMAIL_ADDRESSES"), ",")
diff --git a/bff/config/config_test.go b/bff/config/config_test.go
index 3edebb0bf7..b86d1ee594 100644
--- a/bff/config/config_test.go
+++ b/bff/config/config_test.go
@@ -49,7 +49,6 @@ func TestLoad(t *testing.T) {
 	assert.Equal(t, "us-west-2", AWSRegion)
 	assert.Equal(t, "example-key-id", AWSAccessKeyID)
 	assert.Equal(t, "example-secret-key", AWSSecretAccessKey)
-	assert.Equal(t, "app-id", AWSAPIID)
 	assert.Equal(t, "https://example.com", AWSAPIGatewayEndpoint)
 	assert.Equal(t, []string{"example.com", "example.org"}, EmailAddresses)
 	assert.True(t, ProxyEnable)
@@ -70,7 +69,6 @@ func TestLoad_NoFile(t *testing.T) {
 	assert.Equal(t, "", AWSRegion)
 	assert.Equal(t, "", AWSAccessKeyID)
 	assert.Equal(t, "", AWSSecretAccessKey)
-	assert.Equal(t, "", AWSAPIID)
 	assert.Equal(t, "", AWSAPIGatewayEndpoint)
 	assert.Equal(t, []string{""}, EmailAddresses)
 	assert.True(t, ProxyEnable)
diff --git a/cloudflare/src/config.ts b/cloudflare/src/config.ts
index b48d97ca8e..cb85f55e7b 100644
--- a/cloudflare/src/config.ts
+++ b/cloudflare/src/config.ts
@@ -6,7 +6,6 @@ export interface Env {
   AWS_REGION: string
   AWS_ACCESS_KEY_ID: string
   AWS_SECRET_ACCESS_KEY: string
-  AWS_API_ID: string
   AWS_API_GATEWAY_ENDPOINT: string
 
   EMAIL_ADDRESSES: string[]