diff --git a/alpaca/entities.go b/alpaca/entities.go
index cd1d8f5..8496153 100644
--- a/alpaca/entities.go
+++ b/alpaca/entities.go
@@ -182,10 +182,12 @@ type AccountActvity struct {
 }
 
 type PortfolioHistory struct {
-	Arrays     []interface{}       `json:"arrays"`
-	Attributes []map[string]string `json:"attributes"`
-	Timeframe  RangeFreq           `json:"timeframe"`
-	BaseValue  float64             `json:"base_value"`
+	BaseValue     decimal.Decimal   `json:"base_value"`
+	Equity        []decimal.Decimal `json:"equity"`
+	ProfitLoss    []decimal.Decimal `json:"profit_loss"`
+	ProfitLossPct []decimal.Decimal `json:"profit_loss_pct"`
+	Timeframe     RangeFreq         `json:"timeframe"`
+	Timestamp     []int64           `json:"timestamp"`
 }
 
 type PlaceOrderRequest struct {
diff --git a/alpaca/rest.go b/alpaca/rest.go
index 38bbf53..13e9629 100644
--- a/alpaca/rest.go
+++ b/alpaca/rest.go
@@ -216,7 +216,17 @@ func (c *Client) GetPortfolioHistory(startDate, endDate *time.Time, period *Hist
 	}
 	q.Set("extended", strconv.FormatBool(extended))
 
-	return &PortfolioHistory{}, nil
+	resp, err := c.get(u)
+	if err != nil {
+		return nil, err
+	}
+
+	portfolioHistory := PortfolioHistory{}
+	if err = unmarshal(resp, &portfolioHistory); err != nil {
+		return nil, err
+	}
+
+	return &portfolioHistory, nil
 }
 
 // ListPositions lists the account's open positions.