diff --git a/src/quic/tokens.cc b/src/quic/tokens.cc
index 18e2ca0534895b..f47aa45c25414f 100644
--- a/src/quic/tokens.cc
+++ b/src/quic/tokens.cc
@@ -124,12 +124,12 @@ StatelessResetToken StatelessResetToken::kInvalid;
 // ============================================================================
 // RetryToken and RegularToken
 namespace {
-ngtcp2_vec generate_retry_token(uint8_t* buffer,
-                                uint64_t version,
-                                const SocketAddress& address,
-                                const CID& retry_cid,
-                                const CID& odcid,
-                                const TokenSecret& token_secret) {
+ngtcp2_vec GenerateRetryToken(uint8_t* buffer,
+                              uint32_t version,
+                              const SocketAddress& address,
+                              const CID& retry_cid,
+                              const CID& odcid,
+                              const TokenSecret& token_secret) {
   ssize_t ret =
       ngtcp2_crypto_generate_retry_token(buffer,
                                          token_secret,
@@ -148,10 +148,10 @@ ngtcp2_vec generate_retry_token(uint8_t* buffer,
   return {buffer, static_cast<size_t>(ret)};
 }
 
-ngtcp2_vec generate_regular_token(uint8_t* buffer,
-                                  uint64_t version,
-                                  const SocketAddress& address,
-                                  const TokenSecret& token_secret) {
+ngtcp2_vec GenerateRegularToken(uint8_t* buffer,
+                                uint32_t version,
+                                const SocketAddress& address,
+                                const TokenSecret& token_secret) {
   ssize_t ret =
       ngtcp2_crypto_generate_regular_token(buffer,
                                            token_secret,
@@ -168,13 +168,13 @@ ngtcp2_vec generate_regular_token(uint8_t* buffer,
 }
 }  // namespace
 
-RetryToken::RetryToken(uint64_t version,
+RetryToken::RetryToken(uint32_t version,
                        const SocketAddress& address,
                        const CID& retry_cid,
                        const CID& odcid,
                        const TokenSecret& token_secret)
     : buf_(),
-      ptr_(generate_retry_token(
+      ptr_(GenerateRetryToken(
           buf_, version, address, retry_cid, odcid, token_secret)) {}
 
 RetryToken::RetryToken(const uint8_t* token, size_t size)
@@ -183,7 +183,7 @@ RetryToken::RetryToken(const uint8_t* token, size_t size)
   DCHECK_IMPLIES(token == nullptr, size = 0);
 }
 
-std::optional<CID> RetryToken::Validate(uint64_t version,
+std::optional<CID> RetryToken::Validate(uint32_t version,
                                         const SocketAddress& addr,
                                         const CID& dcid,
                                         const TokenSecret& token_secret,
@@ -213,11 +213,11 @@ RetryToken::operator const ngtcp2_vec*() const {
   return &ptr_;
 }
 
-RegularToken::RegularToken(uint64_t version,
+RegularToken::RegularToken(uint32_t version,
                            const SocketAddress& address,
                            const TokenSecret& token_secret)
     : buf_(),
-      ptr_(generate_regular_token(buf_, version, address, token_secret)) {}
+      ptr_(GenerateRegularToken(buf_, version, address, token_secret)) {}
 
 RegularToken::RegularToken(const uint8_t* token, size_t size)
     : ptr_(ngtcp2_vec{const_cast<uint8_t*>(token), size}) {
@@ -225,7 +225,7 @@ RegularToken::RegularToken(const uint8_t* token, size_t size)
   DCHECK_IMPLIES(token == nullptr, size = 0);
 }
 
-bool RegularToken::Validate(uint64_t version,
+bool RegularToken::Validate(uint32_t version,
                             const SocketAddress& addr,
                             const TokenSecret& token_secret,
                             uint64_t verification_expiration) {
diff --git a/src/quic/tokens.h b/src/quic/tokens.h
index ad47a5a2fe8fcb..00c2bf81233e69 100644
--- a/src/quic/tokens.h
+++ b/src/quic/tokens.h
@@ -163,7 +163,7 @@ class RetryToken final : public MemoryRetainer {
   static constexpr uint64_t QUIC_MIN_RETRYTOKEN_EXPIRATION = 1 * NGTCP2_SECONDS;
 
   // Generates a new retry token.
-  RetryToken(uint64_t version,
+  RetryToken(uint32_t version,
              const SocketAddress& address,
              const CID& retry_cid,
              const CID& odcid,
@@ -176,7 +176,7 @@ class RetryToken final : public MemoryRetainer {
   // the embedded original CID will be extracted from the token an
   // returned. If the token is invalid, std::nullopt will be returned.
   std::optional<CID> Validate(
-      uint64_t version,
+      uint32_t version,
       const SocketAddress& address,
       const CID& cid,
       const TokenSecret& token_secret,
@@ -212,7 +212,7 @@ class RegularToken final : public MemoryRetainer {
       1 * NGTCP2_SECONDS;
 
   // Generates a new retry token.
-  RegularToken(uint64_t version,
+  RegularToken(uint32_t version,
                const SocketAddress& address,
                const TokenSecret& token_secret);
 
@@ -221,7 +221,7 @@ class RegularToken final : public MemoryRetainer {
 
   // Validates the retry token given the input.
   bool Validate(
-      uint64_t version,
+      uint32_t version,
       const SocketAddress& address,
       const TokenSecret& token_secret,
       uint64_t verification_expiration = QUIC_DEFAULT_REGULARTOKEN_EXPIRATION);