diff --git a/src/github/schemas.ts b/src/github/schemas.ts
index c361608f..d7b45bd4 100644
--- a/src/github/schemas.ts
+++ b/src/github/schemas.ts
@@ -56,7 +56,7 @@ export const GitHubFileContentSchema = z.object({
   download_url: z.string(),
   type: z.string(),
   content: z.string(),
-  encoding: z.string().nullable(),
+  encoding: z.string().optional(),
   _links: GithubFileContentLinks
 });