diff --git a/docs/resources/file.md b/docs/resources/file.md
index 680608c..84b3960 100644
--- a/docs/resources/file.md
+++ b/docs/resources/file.md
@@ -44,11 +44,11 @@ resource "ctfd_file" "http_file" {
 
 ### Required
 
-- `challenge_id` (String) Challenge of the file.
 - `name` (String) Name of the file as displayed to end-users.
 
 ### Optional
 
+- `challenge_id` (String) Challenge of the file.
 - `content` (String, Sensitive) Raw content of the file, perfectly fit the use-cases of a .txt document or anything with a simple binary content. You could provide it from the file-system using `file("${path.module}/...")`.
 - `contentb64` (String, Sensitive) Base 64 content of the file, perfectly fit the use-cases of complex binaries. You could provide it from the file-system using `filebase64("${path.module}/...")`.
 - `location` (String) Location where the file is stored on the CTFd instance, for download purposes.
diff --git a/go.mod b/go.mod
index 0c79b23..6367fbc 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,7 @@ module github.com/ctfer-io/terraform-provider-ctfd
 go 1.22
 
 require (
-	github.com/ctfer-io/go-ctfd v0.8.0
+	github.com/ctfer-io/go-ctfd v0.8.1
 	github.com/hashicorp/terraform-plugin-docs v0.19.2
 	github.com/hashicorp/terraform-plugin-framework v1.8.0
 	github.com/hashicorp/terraform-plugin-go v0.23.0
diff --git a/go.sum b/go.sum
index 442804b..5fdabb7 100644
--- a/go.sum
+++ b/go.sum
@@ -29,8 +29,8 @@ github.com/bufbuild/protocompile v0.4.0 h1:LbFKd2XowZvQ/kajzguUp2DC9UEIQhIq77fZZ
 github.com/bufbuild/protocompile v0.4.0/go.mod h1:3v93+mbWn/v3xzN+31nwkJfrEpAUwp+BagBSZWx+TP8=
 github.com/cloudflare/circl v1.3.7 h1:qlCDlTPz2n9fu58M0Nh1J/JzcFpfgkFHHX3O35r5vcU=
 github.com/cloudflare/circl v1.3.7/go.mod h1:sRTcRWXGLrKw6yIGJ+l7amYJFfAXbZG0kBSc8r4zxgA=
-github.com/ctfer-io/go-ctfd v0.8.0 h1:as4TWW0OFI/4oZnJi8ad1pEeVqcZWVw2HiQl0rMDWNk=
-github.com/ctfer-io/go-ctfd v0.8.0/go.mod h1:zOOgs1LmKEVW3rilcog0jT921vjShmR3avJbSMtvNyM=
+github.com/ctfer-io/go-ctfd v0.8.1 h1:/cXBR6rJ6S4Q2w7HS5otQvyQ4GK9pzDTsrqCxOl69oc=
+github.com/ctfer-io/go-ctfd v0.8.1/go.mod h1:zOOgs1LmKEVW3rilcog0jT921vjShmR3avJbSMtvNyM=
 github.com/cyphar/filepath-securejoin v0.2.4 h1:Ugdm7cg7i6ZK6x3xDF1oEu1nfkyfH53EtKeQYTC3kyg=
 github.com/cyphar/filepath-securejoin v0.2.4/go.mod h1:aPGpWjXOXUn2NCNjFvBE6aRxGGx79pTxQpKOJNYHHl4=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
diff --git a/provider/file_resource.go b/provider/file_resource.go
index afd01b5..1ded325 100644
--- a/provider/file_resource.go
+++ b/provider/file_resource.go
@@ -60,7 +60,7 @@ func (r *fileResource) Schema(ctx context.Context, req resource.SchemaRequest, r
 			},
 			"challenge_id": schema.StringAttribute{
 				MarkdownDescription: "Challenge of the file.",
-				Required:            true,
+				Optional:            true,
 			},
 			"name": schema.StringAttribute{
 				MarkdownDescription: "Name of the file as displayed to end-users.",
@@ -138,8 +138,7 @@ func (r *fileResource) Create(ctx context.Context, req resource.CreateRequest, r
 	}
 
 	// Create file
-	res, err := r.client.PostFiles(&api.PostFilesParams{
-		Challenge: utils.Ptr(utils.Atoi(data.ChallengeID.ValueString())),
+	params := &api.PostFilesParams{
 		Files: []*api.InputFile{
 			{
 				Name:    data.Name.ValueString(),
@@ -147,7 +146,11 @@ func (r *fileResource) Create(ctx context.Context, req resource.CreateRequest, r
 			},
 		},
 		Location: data.Location.ValueStringPointer(),
-	}, api.WithContext(ctx))
+	}
+	if !data.ChallengeID.IsNull() {
+		params.Challenge = utils.Ptr(utils.Atoi(data.ChallengeID.ValueString()))
+	}
+	res, err := r.client.PostFiles(params, api.WithContext(ctx))
 	if err != nil {
 		resp.Diagnostics.AddError(
 			"Client Error",
@@ -291,9 +294,5 @@ func lookForChallengeId(ctx context.Context, client *api.Client, fileID int, dia
 			}
 		}
 	}
-	diags.AddError(
-		"Provider Error",
-		fmt.Sprintf("Unable to find challenge of file %d", fileID),
-	)
 	return types.StringNull()
 }
diff --git a/provider/file_resource_test.go b/provider/file_resource_test.go
index 4da8e4a..44e2632 100644
--- a/provider/file_resource_test.go
+++ b/provider/file_resource_test.go
@@ -25,6 +25,11 @@ resource "ctfd_file" "pouet" {
 	name         = "pouet.txt"
 	content      = "Pouet is a clown cat"
 }
+
+resource "ctfd_file" "pouet_2" {
+	name         = "pouet-2.txt"
+	content      = "Pouet is a clown cat, but has not challenge"
+}
 `,
 			},
 			// ImportState testing
@@ -48,6 +53,11 @@ resource "ctfd_file" "pouet" {
 	name         = "pouet.txt"
 	content      = "Pouet the 2nd is the clowniest cat ever"
 }
+
+resource "ctfd_file" "pouet_2" {
+	name         = "pouet-2.txt"
+	content      = "Pouet is a clown cat, but has not challenge"
+}
 `,
 			},
 			// Delete testing automatically occurs in TestCase