diff --git a/resources/migrations/20240213074641-add-dictionary-unknownword-index.down.sql b/resources/migrations/20240213074641-add-dictionary-unknownword-index.down.sql
new file mode 100644
index 0000000..6b03d99
--- /dev/null
+++ b/resources/migrations/20240213074641-add-dictionary-unknownword-index.down.sql
@@ -0,0 +1 @@
+DROP INDEX dictionary_unknownword_index ON dictionary_unknownword;
diff --git a/resources/migrations/20240213074641-add-dictionary-unknownword-index.up.sql b/resources/migrations/20240213074641-add-dictionary-unknownword-index.up.sql
new file mode 100644
index 0000000..2b77f4e
--- /dev/null
+++ b/resources/migrations/20240213074641-add-dictionary-unknownword-index.up.sql
@@ -0,0 +1 @@
+CREATE INDEX dictionary_unknownword_index ON dictionary_unknownword (document_id, untranslated);