diff --git a/pkcs11/tests/meta_object_test.c b/pkcs11/tests/meta_object_test.c
index c38a9b49..6c5d6508 100644
--- a/pkcs11/tests/meta_object_test.c
+++ b/pkcs11/tests/meta_object_test.c
@@ -61,7 +61,7 @@ static CK_SESSION_HANDLE open_test_session(char *password) {
   }
   char config[256];
   assert(strlen(connector_url) + strlen("connector=") < 256);
-  sprintf(config, "connector=%s", connector_url);
+  snprintf(config, sizeof(config), "connector=%s", connector_url);
   initArgs.pReserved = (void *) config;
   CK_RV rv = p11->C_Initialize(&initArgs);
   assert(rv == CKR_OK);