diff --git a/pandoc.ts b/pandoc.ts
index d680a68..1ba1e82 100644
--- a/pandoc.ts
+++ b/pandoc.ts
@@ -139,7 +139,7 @@ export const pandoc = async (input: PandocInput, output: PandocOutput, extraPara
     if (input.metadataFile) args.push('--metadata-file', input.metadataFile);
     // Extra parameters
     if (extraParams) {
-        extraParams = extraParams.flatMap(x => x.split(' ')).filter(x => x.length);
+        extraParams = extraParams.flatMap(x => x).filter(x => x.length);
         args.push(...extraParams);
     }