diff --git a/.cspell.json b/.cspell.json
index 1f406d6c..bdb93b29 100644
--- a/.cspell.json
+++ b/.cspell.json
@@ -1230,6 +1230,7 @@
     "optarg",
     "optenv",
     "OPTIND",
+    "optuna",
     "orangered",
     "orocos",
     "orthometric",