diff --git a/packages/adblocker/tools/generate_compression_codebooks.ts b/packages/adblocker/tools/generate_compression_codebooks.ts
index f8c347820f..ce73c7d2a0 100644
--- a/packages/adblocker/tools/generate_compression_codebooks.ts
+++ b/packages/adblocker/tools/generate_compression_codebooks.ts
@@ -130,7 +130,7 @@ async function generateCodebook(kind: string): Promise<string[]> {
   } else if (kind === 'raw-network') {
     options.maxNgram = 20;
   } else if (kind === 'cosmetic-selector') {
-    options.maxNgram = 127;
+    options.maxNgram = 110;
   }
   const codebook = generate(strings, options);
   validateCodebook(codebook, strings);