diff --git a/packages/cli/commands.ts b/packages/cli/commands.ts
index eb89a472..db1439f1 100644
--- a/packages/cli/commands.ts
+++ b/packages/cli/commands.ts
@@ -775,10 +775,9 @@ async function importWorkflows(
     // extract workflow exports (named and default)
     for (const [key, value] of Object.entries(module)) {
       if (isWorkflow(value)) {
-        const workflow = value as Workflow<unknown, unknown, unknown>;
-        workflows.push(workflow);
+        workflows.push(value);
         consola.debug(
-          `Found workflow "${workflow.spec.name}" in ${file} (${key})`,
+          `Found workflow "${value.spec.name}" in ${file} (${key})`,
         );
       }
     }
diff --git a/packages/openworkflow/core/workflow-definition.ts b/packages/openworkflow/core/workflow-definition.ts
index b84d02b3..5818bab1 100644
--- a/packages/openworkflow/core/workflow-definition.ts
+++ b/packages/openworkflow/core/workflow-definition.ts
@@ -106,7 +106,9 @@ export function defineWorkflow<Input, Output, RawInput>(
  * @param value - The value to check
  * @returns True if the value is a Workflow
  */
-export function isWorkflow(value: unknown) {
+export function isWorkflow(
+  value: unknown,
+): value is Workflow<unknown, unknown, unknown> {
   if (typeof value !== "object" || value === null) {
     return false;
   }