diff --git a/api/handler.go b/api/handler.go
index 928f165..63005cf 100644
--- a/api/handler.go
+++ b/api/handler.go
@@ -38,6 +38,7 @@ func Handler() *mux.Router {
 	m.Get(router.Strain).Handler(handler(serveStrain))
 	m.Get(router.CreateStrain).Handler(handler(serveCreateStrain))
 	m.Get(router.Strains).Handler(handler(serveStrainList))
+	m.Get(router.UpdateStrain).Handler(handler(serveUpdateStrain))
 
 	return m
 }
diff --git a/api/strains.go b/api/strains.go
index 159796b..a3bf4e6 100644
--- a/api/strains.go
+++ b/api/strains.go
@@ -57,3 +57,22 @@ func serveStrainList(w http.ResponseWriter, r *http.Request) error {
 
 	return writeJSON(w, strains)
 }
+
+func serveUpdateStrain(w http.ResponseWriter, r *http.Request) error {
+	id, _ := strconv.ParseInt(mux.Vars(r)["Id"], 10, 0)
+	var strain models.Strain
+	err := json.NewDecoder(r.Body).Decode(&strain)
+	if err != nil {
+		return err
+	}
+
+	updated, err := store.Strains.Update(id, &strain)
+	if err != nil {
+		return err
+	}
+	if updated {
+		w.WriteHeader(http.StatusOK)
+	}
+
+	return writeJSON(w, strain)
+}
diff --git a/api/strains_test.go b/api/strains_test.go
index d0dd5cb..6b931be 100644
--- a/api/strains_test.go
+++ b/api/strains_test.go
@@ -96,3 +96,33 @@ func TestStrain_List(t *testing.T) {
 		t.Errorf("got strains %+v but wanted strains %+v", strains, want)
 	}
 }
+
+func TestStrain_Update(t *testing.T) {
+	setup()
+
+	want := newStrain()
+
+	calledPut := false
+	store.Strains.(*models.MockStrainsService).Update_ = func(id int64, strain *models.Strain) (bool, error) {
+		if id != want.Id {
+			t.Errorf("wanted request for strain %d but got %d", want.Id, id)
+		}
+		if !normalizeDeepEqual(want, strain) {
+			t.Errorf("wanted request for strain %d but got %d", want, strain)
+		}
+		calledPut = true
+		return true, nil
+	}
+
+	success, err := apiClient.Strains.Update(1, want)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if !calledPut {
+		t.Error("!calledPut")
+	}
+	if !success {
+		t.Error("!success")
+	}
+}
diff --git a/datastore/strains.go b/datastore/strains.go
index 25c77ba..d2450e7 100644
--- a/datastore/strains.go
+++ b/datastore/strains.go
@@ -39,3 +39,25 @@ func (s *strainsStore) List(opt *models.StrainListOptions) ([]*models.Strain, er
 	}
 	return strains, nil
 }
+
+func (s *strainsStore) Update(id int64, strain *models.Strain) (bool, error) {
+	_, err := s.Get(id)
+	if err != nil {
+		return false, err
+	}
+
+	if id != strain.Id {
+		return false, models.ErrStrainNotFound
+	}
+
+	changed, err := s.dbh.Update(strain)
+	if err != nil {
+		return false, err
+	}
+
+	if changed == 0 {
+		return false, ErrNoRowsUpdated
+	}
+
+	return true, nil
+}
diff --git a/datastore/strains_test.go b/datastore/strains_test.go
index bc2c6bc..2d66773 100644
--- a/datastore/strains_test.go
+++ b/datastore/strains_test.go
@@ -87,3 +87,23 @@ func TestStrainsStore_List_db(t *testing.T) {
 		t.Errorf("got strains %+v, want %+v", strains, want)
 	}
 }
+
+func TestStrainsStore_Update_db(t *testing.T) {
+	tx, _ := DB.Begin()
+	defer tx.Rollback()
+
+	strain := insertStrain(t, tx)
+
+	d := NewDatastore(tx)
+
+	// Tweak it
+	strain.StrainName = "Updated Strain"
+	updated, err := d.Strains.Update(strain.Id, strain)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if !updated {
+		t.Error("!updated")
+	}
+}
diff --git a/models/strains.go b/models/strains.go
index d6b044e..c57a56e 100644
--- a/models/strains.go
+++ b/models/strains.go
@@ -17,7 +17,7 @@ type Strain struct {
 	StrainType     string    `db:"strain_type" json:"strain_type"`
 	Etymology      string    `db:"etymology" json:"etymology"`
 	AccessionBanks string    `db:"accession_banks" json:"accession_banks"`
-	GenbankEmblDdb string    `db:"genbank_embl_ddb" json:"genbank_eml_ddb"`
+	GenbankEmblDdb string    `db:"genbank_embl_ddb" json:"genbank_embl_ddb"`
 	CreatedAt      time.Time `db:"created_at" json:"created_at"`
 	UpdatedAt      time.Time `db:"updated_at" json:"updated_at"`
 	DeletedAt      time.Time `db:"deleted_at" json:"deleted_at"`
@@ -37,6 +37,9 @@ type StrainsService interface {
 
 	// Create a strain record
 	Create(strain *Strain) (bool, error)
+
+	// Update an existing strain
+	Update(id int64, strain *Strain) (updated bool, err error)
 }
 
 var (
@@ -112,10 +115,32 @@ func (s *strainsService) List(opt *StrainListOptions) ([]*Strain, error) {
 	return strains, nil
 }
 
+func (s *strainsService) Update(id int64, strain *Strain) (bool, error) {
+	strId := strconv.FormatInt(id, 10)
+
+	url, err := s.client.url(router.UpdateStrain, map[string]string{"Id": strId}, nil)
+	if err != nil {
+		return false, err
+	}
+
+	req, err := s.client.NewRequest("PUT", url.String(), strain)
+	if err != nil {
+		return false, err
+	}
+
+	resp, err := s.client.Do(req, &strain)
+	if err != nil {
+		return false, err
+	}
+
+	return resp.StatusCode == http.StatusOK, nil
+}
+
 type MockStrainsService struct {
 	Get_    func(id int64) (*Strain, error)
 	List_   func(opt *StrainListOptions) ([]*Strain, error)
 	Create_ func(strain *Strain) (bool, error)
+	Update_ func(id int64, strain *Strain) (bool, error)
 }
 
 var _ StrainsService = &MockStrainsService{}
@@ -140,3 +165,10 @@ func (s *MockStrainsService) List(opt *StrainListOptions) ([]*Strain, error) {
 	}
 	return s.List_(opt)
 }
+
+func (s *MockStrainsService) Update(id int64, strain *Strain) (bool, error) {
+	if s.Update_ == nil {
+		return false, nil
+	}
+	return s.Update_(id, strain)
+}
diff --git a/models/strains_test.go b/models/strains_test.go
index d0ee0e6..6531a05 100644
--- a/models/strains_test.go
+++ b/models/strains_test.go
@@ -55,7 +55,7 @@ func TestStrainService_Create(t *testing.T) {
 	mux.HandleFunc(urlPath(t, router.CreateStrain, nil), func(w http.ResponseWriter, r *http.Request) {
 		called = true
 		testMethod(t, r, "POST")
-		testBody(t, r, `{"id":1,"species_id":1,"strain_name":"Test Strain","strain_type":"Test Type","etymology":"Test Etymology","accession_banks":"Test Accession","genbank_eml_ddb":"Test Genbank","created_at":"0001-01-01T00:00:00Z","updated_at":"0001-01-01T00:00:00Z","deleted_at":"0001-01-01T00:00:00Z"}`+"\n")
+		testBody(t, r, `{"id":1,"species_id":1,"strain_name":"Test Strain","strain_type":"Test Type","etymology":"Test Etymology","accession_banks":"Test Accession","genbank_embl_ddb":"Test Genbank","created_at":"0001-01-01T00:00:00Z","updated_at":"0001-01-01T00:00:00Z","deleted_at":"0001-01-01T00:00:00Z"}`+"\n")
 
 		w.WriteHeader(http.StatusCreated)
 		writeJSON(w, want)
@@ -113,3 +113,38 @@ func TestStrainService_List(t *testing.T) {
 		t.Errorf("Strains.List return %+v, want %+v", strains, want)
 	}
 }
+
+func TestStrainService_Update(t *testing.T) {
+	setup()
+	defer teardown()
+
+	want := newStrain()
+
+	var called bool
+	mux.HandleFunc(urlPath(t, router.UpdateStrain, map[string]string{"Id": "1"}), func(w http.ResponseWriter, r *http.Request) {
+		called = true
+		testMethod(t, r, "PUT")
+		testBody(t, r, `{"id":1,"species_id":1,"strain_name":"Test Strain Updated","strain_type":"Test Type Updated","etymology":"Test Etymology Updated","accession_banks":"Test Accession Updated","genbank_embl_ddb":"Test Genbank Updated","created_at":"0001-01-01T00:00:00Z","updated_at":"0001-01-01T00:00:00Z","deleted_at":"0001-01-01T00:00:00Z"}`+"\n")
+		w.WriteHeader(http.StatusOK)
+		writeJSON(w, want)
+	})
+
+	strain := newStrain()
+	strain.StrainName = "Test Strain Updated"
+	strain.StrainType = "Test Type Updated"
+	strain.Etymology = "Test Etymology Updated"
+	strain.AccessionBanks = "Test Accession Updated"
+	strain.GenbankEmblDdb = "Test Genbank Updated"
+	updated, err := client.Strains.Update(strain.Id, strain)
+	if err != nil {
+		t.Errorf("Strains.Update returned error: %v", err)
+	}
+
+	if !updated {
+		t.Error("!updated")
+	}
+
+	if !called {
+		t.Fatal("!called")
+	}
+}
diff --git a/router/api.go b/router/api.go
index 7678abc..2f27ae3 100644
--- a/router/api.go
+++ b/router/api.go
@@ -28,6 +28,7 @@ func API() *mux.Router {
 	m.Path("/strains").Methods("GET").Name(Strains)
 	m.Path("/strains").Methods("POST").Name(CreateStrain)
 	m.Path("/strains/{Id:.+}").Methods("GET").Name(Strain)
+	m.Path("/strains/{Id:.+}").Methods("PUT").Name(UpdateStrain)
 
 	return m
 }
diff --git a/router/routes.go b/router/routes.go
index 068b179..8658634 100644
--- a/router/routes.go
+++ b/router/routes.go
@@ -20,4 +20,5 @@ const (
 	Strain       = "strain:get"
 	CreateStrain = "strain:create"
 	Strains      = "strain:list"
+	UpdateStrain = "strain:update"
 )