diff --git a/CMakeLists.txt b/CMakeLists.txt
index 38b165d..80d3508 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -70,6 +70,20 @@ FetchContent_Declare(
 )
 FetchContent_MakeAvailable(simdutf)
 
+FetchContent_Declare(
+  llhttp
+  URL "https://github.com/nodejs/llhttp/archive/refs/tags/release/v9.2.1.tar.gz"
+  URL_HASH
+    SHA256=3c163891446e529604b590f9ad097b2e98b5ef7e4d3ddcf1cf98b62ca668f23e
+  DOWNLOAD_EXTRACT_TIMESTAMP ON)
+set(BUILD_SHARED_LIBS
+    OFF
+    CACHE INTERNAL "")
+set(BUILD_STATIC_LIBS
+    ON
+    CACHE INTERNAL "")
+FetchContent_MakeAvailable(llhttp)
+
 include_directories(src)
 
 find_package(weaseljson REQUIRED)