diff --git a/experimental/plugins/postgres_storage/src/postgres_storage.rs b/experimental/plugins/postgres_storage/src/postgres_storage.rs
index 01f66362a1..0d5e510aff 100644
--- a/experimental/plugins/postgres_storage/src/postgres_storage.rs
+++ b/experimental/plugins/postgres_storage/src/postgres_storage.rs
@@ -146,7 +146,7 @@ const _CREATE_SCHEMA: [&str; 12] = [
             ON UPDATE CASCADE
     )",
     "CREATE INDEX IF NOT EXISTS ix_tags_encrypted_name ON tags_encrypted(name)",
-    "CREATE INDEX IF NOT EXISTS ix_tags_encrypted_value ON tags_encrypted(value)",
+    "CREATE INDEX IF NOT EXISTS ix_tags_encrypted_value ON tags_encrypted(sha256(value))",
     "CREATE INDEX IF NOT EXISTS ix_tags_encrypted_item_id ON tags_encrypted(item_id)",
     "CREATE TABLE IF NOT EXISTS tags_plaintext(
         name BYTEA NOT NULL,