diff --git a/src/challenge-modules/challenge-pin.cpp b/src/challenge-modules/challenge-pin.cpp
index ecc17db..a5d5580 100644
--- a/src/challenge-modules/challenge-pin.cpp
+++ b/src/challenge-modules/challenge-pin.cpp
@@ -38,7 +38,7 @@
 
 // For CA
 std::tuple<ErrorCode, std::string>
-ChallengePin::handleChallengeRequest(const Block& params, RequestState& request)
+ChallengePin::handleChallengeRequest(const Block& params, CaState& request)
 {
   params.parse();
   auto currentTime = time::system_clock::now();