diff --git a/src/tpm.c b/src/tpm.c
index 40d750f..6d86a2a 100644
--- a/src/tpm.c
+++ b/src/tpm.c
@@ -439,7 +439,7 @@ static void rsu_handle_recv(facilities_t* facilities, TPM_t* tpm_rx, void* secur
     TollingType_t* type_rx = tpm_rx->tpm->tollingType;
 
     uint64_t client_id, nonce, info_id;
-    const uint32_t buf_len = 1200;
+    const uint32_t buf_len = 1800;
     uint8_t buf[buf_len];
     uint8_t tpm_uper[buf_len];