diff --git a/README.md b/README.md
index 68ca9ec..d214df6 100644
--- a/README.md
+++ b/README.md
@@ -521,7 +521,7 @@ Available targets:
 
 | Name | Version |
 |------|---------|
-| terraform | ~> 0.12.0 |
+| terraform | >= 0.12.0, < 0.14.0 |
 
 ## Providers
 
diff --git a/docs/terraform.md b/docs/terraform.md
index fd610fc..970fe78 100644
--- a/docs/terraform.md
+++ b/docs/terraform.md
@@ -2,7 +2,7 @@
 
 | Name | Version |
 |------|---------|
-| terraform | ~> 0.12.0 |
+| terraform | >= 0.12.0, < 0.14.0 |
 
 ## Providers
 
diff --git a/versions.tf b/versions.tf
index 7000b05..92a263e 100644
--- a/versions.tf
+++ b/versions.tf
@@ -1,3 +1,3 @@
 terraform {
-  required_version = "~> 0.12.0"
+  required_version = ">= 0.12.0, < 0.14.0"
 }