diff --git a/.changeset/thin-falcons-argue.md b/.changeset/thin-falcons-argue.md
new file mode 100644
index 0000000000..a845151cc8
--- /dev/null
+++ b/.changeset/thin-falcons-argue.md
@@ -0,0 +1,2 @@
+---
+---
diff --git a/packages/airnode-deployer/docker/Dockerfile b/packages/airnode-deployer/docker/Dockerfile
index 2f92a54113..0a596820e7 100644
--- a/packages/airnode-deployer/docker/Dockerfile
+++ b/packages/airnode-deployer/docker/Dockerfile
@@ -4,7 +4,7 @@ ARG npmRegistryUrl=https://registry.npmjs.org/
 ARG npmTag=latest
 
 ENV name="airnode-deployer" \
-    baseTerraformURL="https://releases.hashicorp.com/terraform/1.3.9/terraform_1.3.9_linux_" \
+    baseTerraformURL="https://releases.hashicorp.com/terraform/1.4.0/terraform_1.4.0_linux_" \
     appDir="/app"
 ENV packageName="@api3/${name}"
 
diff --git a/packages/airnode-deployer/terraform/aws/backend.tf b/packages/airnode-deployer/terraform/aws/backend.tf
index 31983f0dfa..6aa79e61fb 100644
--- a/packages/airnode-deployer/terraform/aws/backend.tf
+++ b/packages/airnode-deployer/terraform/aws/backend.tf
@@ -1,5 +1,5 @@
 terraform {
-  required_version = "~> 1.3"
+  required_version = "~> 1.4"
 
   backend "s3" {
     key      = "terraform.tfstate"
diff --git a/packages/airnode-deployer/terraform/aws/providers.tf b/packages/airnode-deployer/terraform/aws/providers.tf
index 50a25af346..dd14e74179 100644
--- a/packages/airnode-deployer/terraform/aws/providers.tf
+++ b/packages/airnode-deployer/terraform/aws/providers.tf
@@ -6,7 +6,7 @@ terraform {
     }
   }
 
-  required_version = "~> 1.3"
+  required_version = "~> 1.4"
 }
 
 provider "aws" {
diff --git a/packages/airnode-deployer/terraform/gcp/backend.tf b/packages/airnode-deployer/terraform/gcp/backend.tf
index b52c9e4f51..cc7819e404 100644
--- a/packages/airnode-deployer/terraform/gcp/backend.tf
+++ b/packages/airnode-deployer/terraform/gcp/backend.tf
@@ -1,5 +1,5 @@
 terraform {
-  required_version = "~> 1.3"
+  required_version = "~> 1.4"
 
   backend "gcs" {
   }
diff --git a/packages/airnode-deployer/terraform/gcp/main.tf b/packages/airnode-deployer/terraform/gcp/main.tf
index 4e25a1c789..96843fc871 100644
--- a/packages/airnode-deployer/terraform/gcp/main.tf
+++ b/packages/airnode-deployer/terraform/gcp/main.tf
@@ -250,9 +250,9 @@ module "oevGw" {
   }
   project = var.gcp_project
 
-  invoke_targets = [
-    module.signOevReq[0].function_name
-  ]
+  invoke_targets = {
+    signOevReq = module.signOevReq[0].function_name
+  }
 
   depends_on = [
     google_project_service.apigateway_api,
diff --git a/packages/airnode-deployer/terraform/gcp/providers.tf b/packages/airnode-deployer/terraform/gcp/providers.tf
index 80569b6586..f4d07dd734 100644
--- a/packages/airnode-deployer/terraform/gcp/providers.tf
+++ b/packages/airnode-deployer/terraform/gcp/providers.tf
@@ -6,7 +6,7 @@ terraform {
     }
   }
 
-  required_version = "~> 1.3"
+  required_version = "~> 1.4"
 }
 
 provider "google" {