diff --git a/src/net/login/GruntLogin.cpp b/src/net/login/GruntLogin.cpp
index dd9a5ee..71b93cb 100644
--- a/src/net/login/GruntLogin.cpp
+++ b/src/net/login/GruntLogin.cpp
@@ -95,9 +95,13 @@ const uint8_t* GruntLogin::GetVersionChallenge() {
 
 void GruntLogin::GetVersionProof(const uint8_t* versionChallenge) {
     if (this->IsReconnect()) {
-        // TODO
+        // During reconnect, version challenge is ignored and version checksum is zeroed out
+        uint8_t versionChecksum[VERSION_CHECKSUM_LEN] = {};
+
+        this->m_clientLink->ProveVersion(versionChecksum);
     } else {
         memcpy(this->m_versionChallenge, versionChallenge, sizeof(this->m_versionChallenge));
+
         LOGIN_STATE nextState = this->NextSecurityState(LOGIN_STATE_FIRST_SECURITY);
 
         this->m_loginResponse->UpdateLoginStatus(