diff --git a/src/main/resources/db/migration/V20__account_email_token_hash_varchar.sql b/src/main/resources/db/migration/V20__account_email_token_hash_varchar.sql
new file mode 100644
index 0000000..31194ef
--- /dev/null
+++ b/src/main/resources/db/migration/V20__account_email_token_hash_varchar.sql
@@ -0,0 +1,3 @@
+-- JPA mappt String-Felder standardmäßig auf VARCHAR, nicht auf CHAR (bpchar).
+ALTER TABLE account_email_tokens
+    ALTER COLUMN token_hash TYPE VARCHAR(64);