diff --git a/internal/provider/provider.go b/internal/provider/provider.go
index 1083307..4e0d779 100644
--- a/internal/provider/provider.go
+++ b/internal/provider/provider.go
@@ -76,7 +76,7 @@ func New(version string, tenant *string) func() *schema.Provider {
 				"keep_original_source": &schema.Schema{
 					Type:        schema.TypeBool,
 					Optional:    true,
-					Description: "Keep original source code, keeping comment and indentation.",
+					Description: "Keep original source code, keeping comment and indentation. Setting to false is now deprecated and will be removed in the future.",
 					DefaultFunc: schema.EnvDefaultFunc("KESTRA_KEEP_ORIGINAL_SOURCE", true),
 				},
 			},
diff --git a/internal/provider/resource_flow.go b/internal/provider/resource_flow.go
index 47396d6..44cc7d6 100644
--- a/internal/provider/resource_flow.go
+++ b/internal/provider/resource_flow.go
@@ -91,6 +91,13 @@ func resourceFlowCreate(ctx context.Context, d *schema.ResourceData, meta interf
 			return errs
 		}
 
+		// Add a warning for JSON creation deprecation
+		diags = append(diags, diag.Diagnostic{
+			Severity: diag.Warning,
+			Summary:  "Deprecation warning",
+			Detail:   "Creating flow not using the YAML source code is deprecated and will be soon removed.",
+		})
+
 		return diags
 	}
 }