diff --git a/db/migrations/1534295713_create_bite_table.up.sql b/db/migrations/1534295713_create_bite_table.up.sql
index eb32e324..5cc7041f 100644
--- a/db/migrations/1534295713_create_bite_table.up.sql
+++ b/db/migrations/1534295713_create_bite_table.up.sql
@@ -9,5 +9,6 @@ CREATE TABLE maker.bite (
   tab       NUMERIC,
   flip      VARCHAR,
   tx_idx    INTEGER NOT NUll,
-  raw_log   JSONB
+  raw_log   JSONB,
+  UNIQUE (header_id, tx_idx)
 )
\ No newline at end of file
diff --git a/db/schema.sql b/db/schema.sql
index 9d1bc2b0..25cd7541 100644
--- a/db/schema.sql
+++ b/db/schema.sql
@@ -701,6 +701,14 @@ ALTER TABLE ONLY public.transactions ALTER COLUMN id SET DEFAULT nextval('public
 ALTER TABLE ONLY public.watched_contracts ALTER COLUMN contract_id SET DEFAULT nextval('public.watched_contracts_contract_id_seq'::regclass);
 
 
+--
+-- Name: bite bite_header_id_tx_idx_key; Type: CONSTRAINT; Schema: maker; Owner: -
+--
+
+ALTER TABLE ONLY maker.bite
+    ADD CONSTRAINT bite_header_id_tx_idx_key UNIQUE (header_id, tx_idx);
+
+
 --
 -- Name: bite bite_pkey; Type: CONSTRAINT; Schema: maker; Owner: -
 --
diff --git a/pkg/transformers/bite/converter.go b/pkg/transformers/bite/converter.go
index 27ef56d3..558a5553 100644
--- a/pkg/transformers/bite/converter.go
+++ b/pkg/transformers/bite/converter.go
@@ -48,6 +48,7 @@ func (BiteConverter) ToEntity(contractAddress string, contractAbi string, ethLog
 	}
 
 	entity.Raw = ethLog
+	entity.TransactionIndex = ethLog.TxIndex
 
 	return entity, nil
 }
diff --git a/pkg/transformers/bite/converter_test.go b/pkg/transformers/bite/converter_test.go
index 79a11168..129e93e3 100644
--- a/pkg/transformers/bite/converter_test.go
+++ b/pkg/transformers/bite/converter_test.go
@@ -17,14 +17,15 @@
 package bite_test
 
 import (
-	. "github.com/onsi/ginkgo"
-	. "github.com/onsi/gomega"
-
+	"math/big"
 	"encoding/json"
+
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/vulcanize/vulcanizedb/pkg/transformers/bite"
 	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data"
-	"math/big"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
 )
 
 var _ = Describe("Bite Converter", func() {
@@ -42,6 +43,8 @@ var _ = Describe("Bite Converter", func() {
 			Expect(entity.Tab).To(Equal(test_data.BiteEntity.Tab))
 			Expect(entity.Flip).To(Equal(test_data.BiteEntity.Flip))
 			Expect(entity.IArt).To(Equal(test_data.BiteEntity.IArt))
+			Expect(entity.TransactionIndex).To(Equal(test_data.BiteEntity.TransactionIndex))
+			Expect(entity.Raw).To(Equal(test_data.BiteEntity.Raw))
 		})
 
 		It("returns an error if converting log to entity fails", func() {
@@ -63,10 +66,10 @@ var _ = Describe("Bite Converter", func() {
 
 			Expect(err).NotTo(HaveOccurred())
 			Expect(model).To(Equal(test_data.BiteModel))
+			Expect(model.TransactionIndex).To(Equal(test_data.BiteModel.TransactionIndex))
 		})
 
 		It("handles nil values", func() {
-			emptyEntity.Id = big.NewInt(1)
 			emptyLog, err := json.Marshal(types.Log{})
 			Expect(err).NotTo(HaveOccurred())
 			expectedModel := bite.BiteModel{
diff --git a/pkg/transformers/bite/repository_test.go b/pkg/transformers/bite/repository_test.go
index 60c88160..8e89e3ec 100644
--- a/pkg/transformers/bite/repository_test.go
+++ b/pkg/transformers/bite/repository_test.go
@@ -64,7 +64,20 @@ var _ = Describe("Bite repository", func() {
 			err = biteRepository.Create(headerID, test_data.BiteModel)
 			Expect(err).NotTo(HaveOccurred())
 
-			err = biteRepository.Create(headerID, test_data.BiteModel)
+			var anotherBiteModel = bite.BiteModel{
+				Id:  			  "11",
+				Ilk:              test_data.BiteModel.Ilk,
+				Lad:              test_data.BiteModel.Lad,
+				Ink:              test_data.BiteModel.Ink,
+				Art:              test_data.BiteModel.Art,
+				Tab:              test_data.BiteModel.Tab,
+				Flip:             test_data.BiteModel.Flip,
+				IArt:             test_data.BiteModel.IArt,
+				TransactionIndex: test_data.BiteModel.TransactionIndex,
+				Raw:              test_data.BiteModel.Raw,
+			}
+
+			err = biteRepository.Create(headerID, anotherBiteModel)
 
 			Expect(err).To(HaveOccurred())
 			Expect(err.Error()).To(ContainSubstring("pq: duplicate key value violates unique constraint"))