diff --git a/internal/schema/backends/backends.go b/internal/schema/backends/backends.go
index 719ecf2d..87ea95b6 100644
--- a/internal/schema/backends/backends.go
+++ b/internal/schema/backends/backends.go
@@ -24,6 +24,7 @@ var (
 	v0_14_0  = version.Must(version.NewVersion("0.14.0"))
 	v0_15_0  = version.Must(version.NewVersion("0.15.0"))
 	v1_3_0   = version.Must(version.NewVersion("1.3.0"))
+	v1_4_0   = version.Must(version.NewVersion("1.4.0"))
 )
 
 func BackendTypesAsOneOfConstraint(tfVersion *version.Version) schema.OneOf {
diff --git a/internal/schema/backends/cos.go b/internal/schema/backends/cos.go
index 8a25fd1e..f567b92b 100644
--- a/internal/schema/backends/cos.go
+++ b/internal/schema/backends/cos.go
@@ -62,6 +62,61 @@ func cosBackend(v *version.Version) *schema.BodySchema {
 				Description: lang.Markdown("Object ACL to be applied to the state file"),
 			},
 		},
+		Blocks: make(map[string]*schema.BlockSchema, 0),
+	}
+
+	if v.GreaterThanOrEqual(v1_3_0) {
+		// See https://github.com/hashicorp/terraform/pull/31425/files
+		bodySchema.Attributes["accelerate"] = &schema.AttributeSchema{
+			Constraint:  schema.LiteralType{Type: cty.Bool},
+			IsOptional:  true,
+			Description: lang.Markdown("Whether to enable global Acceleration"),
+		}
+	}
+
+	if v.GreaterThanOrEqual(v1_4_0) {
+		// See https://github.com/hashicorp/terraform/pull/32631/files
+		bodySchema.Attributes["secret_id"].IsRequired = false
+		bodySchema.Attributes["secret_id"].IsOptional = true
+		bodySchema.Attributes["secret_key"].IsRequired = false
+		bodySchema.Attributes["secret_key"].IsOptional = true
+
+		bodySchema.Attributes["security_token"] = &schema.AttributeSchema{
+			Constraint:  schema.LiteralType{Type: cty.String},
+			IsOptional:  true,
+			Description: lang.Markdown("TencentCloud Security Token of temporary access credentials. It can be sourced from the `TENCENTCLOUD_SECURITY_TOKEN` environment variable. Notice: for supported products, please refer to: [temporary key supported products](https://intl.cloud.tencent.com/document/product/598/10588)."),
+			IsSensitive: true,
+		}
+
+		bodySchema.Blocks["assume_role"] = &schema.BlockSchema{
+			Type:        schema.BlockTypeSet,
+			MaxItems:    1,
+			Description: lang.Markdown("The `assume_role` block. If provided, terraform will attempt to assume this role using the supplied credentials."),
+			Body: &schema.BodySchema{
+				Attributes: map[string]*schema.AttributeSchema{
+					"role_arn": {
+						Constraint:  schema.LiteralType{Type: cty.String},
+						IsRequired:  true,
+						Description: lang.Markdown("The ARN of the role to assume. It can be sourced from the `TENCENTCLOUD_ASSUME_ROLE_ARN`."),
+					},
+					"session_name": {
+						Constraint:  schema.LiteralType{Type: cty.String},
+						IsRequired:  true,
+						Description: lang.Markdown("The session name to use when making the AssumeRole call. It can be sourced from the `TENCENTCLOUD_ASSUME_ROLE_SESSION_NAME`."),
+					},
+					"session_duration": {
+						Constraint:  schema.LiteralType{Type: cty.Number},
+						IsRequired:  true,
+						Description: lang.Markdown("The duration of the session when making the AssumeRole call. Its value ranges from 0 to 43200(seconds), and default is 7200 seconds. It can be sourced from the `TENCENTCLOUD_ASSUME_ROLE_SESSION_DURATION`."),
+					},
+					"policy": {
+						Constraint:  schema.LiteralType{Type: cty.String},
+						IsOptional:  true,
+						Description: lang.Markdown("A more restrictive policy when making the AssumeRole call. Its content must not contains `principal` elements. Notice: more syntax references, please refer to: [policies syntax logic](https://intl.cloud.tencent.com/document/product/598/10603)."),
+					},
+				},
+			},
+		}
 	}
 
 	return bodySchema
diff --git a/schema/core_schema_test.go b/schema/core_schema_test.go
index cb3d948d..86e1be57 100644
--- a/schema/core_schema_test.go
+++ b/schema/core_schema_test.go
@@ -122,7 +122,7 @@ func TestCoreModuleSchemaForConstraint(t *testing.T) {
 		},
 		{
 			version.Constraints{},
-			mod_v1_2.ModuleSchema(version.Must(version.NewVersion("1.3.0"))),
+			mod_v1_2.ModuleSchema(version.Must(version.NewVersion("1.4.0"))),
 			nil,
 		},
 		{