diff --git a/backend/cpp/llama/prepare.sh b/backend/cpp/llama/prepare.sh
index 3684c39e..3fd0e022 100644
--- a/backend/cpp/llama/prepare.sh
+++ b/backend/cpp/llama/prepare.sh
@@ -9,7 +9,7 @@ done
 
 cp -r CMakeLists.txt llama.cpp/tools/grpc-server/
 cp -r grpc-server.cpp llama.cpp/tools/grpc-server/
-cp -rfv llama.cpp/tools/server/json.hpp llama.cpp/tools/grpc-server/
+cp -rfv llama.cpp/common/json.hpp llama.cpp/tools/grpc-server/
 cp -rfv llama.cpp/tools/server/utils.hpp llama.cpp/tools/grpc-server/
 
 if grep -q "grpc-server" llama.cpp/tools/CMakeLists.txt; then