diff --git a/schemas.ts b/schemas.ts
index 19a7904..063a6bd 100644
--- a/schemas.ts
+++ b/schemas.ts
@@ -332,7 +332,7 @@ export const GitLabMergeRequestSchema = z.object({
   assignees: z.array(GitLabUserSchema).optional(),
   source_branch: z.string(),
   target_branch: z.string(),
-  diff_refs: GitLabMergeRequestDiffRefSchema.optional(),
+  diff_refs: GitLabMergeRequestDiffRefSchema.nullable().optional(),
   web_url: z.string(),
   created_at: z.string(),
   updated_at: z.string(),
@@ -345,10 +345,10 @@ export const GitLabMergeRequestSchema = z.object({
   work_in_progress: z.boolean().optional(),
   blocking_discussions_resolved: z.boolean().optional(),
   should_remove_source_branch: z.boolean().nullable().optional(),
-  force_remove_source_branch: z.boolean().optional(),
+  force_remove_source_branch: z.boolean().nullable().optional(),
   allow_collaboration: z.boolean().optional(),
   allow_maintainer_to_push: z.boolean().optional(),
-  changes_count: z.string().optional(),
+  changes_count: z.string().nullable().optional(),
   merge_when_pipeline_succeeds: z.boolean().optional(),
   squash: z.boolean().optional(),
   labels: z.array(z.string()).optional(),