diff --git a/src/accounting/static/js/account-form.js b/src/accounting/static/js/account-form.js
index 03482c2..88fda14 100644
--- a/src/accounting/static/js/account-form.js
+++ b/src/accounting/static/js/account-form.js
@@ -310,7 +310,7 @@ class BaseAccountSelector {
                 const queryValues = JSON.parse(option.dataset.queryValues);
                 let isMatched = false;
                 for (const queryValue of queryValues) {
-                    if (queryValue.includes(this.#query.value)) {
+                    if (queryValue.toLowerCase().includes(this.#query.value.toLowerCase())) {
                         isMatched = true;
                         break;
                     }
diff --git a/src/accounting/static/js/account-selector.js b/src/accounting/static/js/account-selector.js
index 2716277..761fb01 100644
--- a/src/accounting/static/js/account-selector.js
+++ b/src/accounting/static/js/account-selector.js
@@ -166,7 +166,7 @@ class AccountSelector {
             }
             const queryValues = JSON.parse(option.dataset.queryValues);
             for (const queryValue of queryValues) {
-                if (queryValue.includes(query.value)) {
+                if (queryValue.toLowerCase().includes(query.value.toLowerCase())) {
                     return true;
                 }
             }