diff --git a/tools/server/utils.hpp b/tools/server/utils.hpp
index fb95361b28..b6198edfc4 100644
--- a/tools/server/utils.hpp
+++ b/tools/server/utils.hpp
@@ -13,6 +13,8 @@
 #define CPPHTTPLIB_FORM_URL_ENCODED_PAYLOAD_MAX_LENGTH 1048576
 // increase backlog size to avoid connection resets for >> 1 slots
 #define CPPHTTPLIB_LISTEN_BACKLOG 512
+// increase max URI length to handle longer prompts in query string
+#define CPPHTTPLIB_REQUEST_URI_MAX_LENGTH 32768
 // disable Nagle's algorithm
 #define CPPHTTPLIB_TCP_NODELAY true
 #include <cpp-httplib/httplib.h>