diff --git a/wacruit/src/apps/resume/models.py b/wacruit/src/apps/resume/models.py
index 14c68b4..d3d685c 100644
--- a/wacruit/src/apps/resume/models.py
+++ b/wacruit/src/apps/resume/models.py
@@ -4,6 +4,7 @@
 from sqlalchemy import DateTime
 from sqlalchemy import ForeignKey
 from sqlalchemy import Text
+from sqlalchemy import UniqueConstraint
 from sqlalchemy.orm import Mapped
 from sqlalchemy.orm import mapped_column
 from sqlalchemy.orm import relationship
@@ -54,6 +55,7 @@ def __str__(self):
 
 class ResumeSubmission(DeclarativeBase):
     __tablename__ = "resume_submission"
+    __table_args__ = (UniqueConstraint("user_id", "question_id", "recruiting_id"),)
 
     id: Mapped[intpk]
     user_id: Mapped[int | None] = mapped_column(
diff --git a/wacruit/src/database/migrations/versions/2023_08_10_0025-9dda918f3fba_unique-resume.py b/wacruit/src/database/migrations/versions/2023_08_10_0025-9dda918f3fba_unique-resume.py
new file mode 100644
index 0000000..03c3f2c
--- /dev/null
+++ b/wacruit/src/database/migrations/versions/2023_08_10_0025-9dda918f3fba_unique-resume.py
@@ -0,0 +1,31 @@
+"""Add unique key constraint to resume_submission table
+
+Revision ID: 9dda918f3fba
+Revises: 5bbc8b8ae19c
+Create Date: 2023-08-10 00:25:36.865535
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+# revision identifiers, used by Alembic.
+revision = "9dda918f3fba"
+down_revision = "5bbc8b8ae19c"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_unique_constraint(
+        "ak_user_question",
+        "resume_submission",
+        ["user_id", "question_id", "recruiting_id"],
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_constraint("ak_user_question", "resume_submission", type_="unique")
+    # ### end Alembic commands ###