diff --git a/cmd/diff.go b/cmd/diff.go
index 825936b..e1b607c 100644
--- a/cmd/diff.go
+++ b/cmd/diff.go
@@ -107,7 +107,7 @@ var diffCmd = &cobra.Command{
 			}
 		}
 
-		openProjectTimeEntries, err := openproject.GetAllTimeEntries(config, openProjectUser, startDate, endDate)
+		openProjectTimeEntries, err := openproject.GetAllTimeEntries(config, openProjectUser, startDate, endDate, nil)
 		if err != nil {
 			_, _ = fmt.Fprint(os.Stderr, err)
 			os.Exit(1)
diff --git a/cmd/export.go b/cmd/export.go
index 97eb97e..7e7e296 100644
--- a/cmd/export.go
+++ b/cmd/export.go
@@ -89,14 +89,14 @@ var exportCmd = &cobra.Command{
 				startTime, _ := time.Parse("2006-01-02", startDate)
 				return startTime.Format("01/2006")
 			},
-			"AllTimeEntriesFromOpenProject": func(user string) []openproject.TimeEntry {
+			"AllTimeEntriesFromOpenProject": func(user string, workpackages []any) []openproject.TimeEntry {
 				var openProjectUser openproject.User
 				openProjectUser, err := openproject.FindUserByName(config, user)
 				if err != nil {
 					_, _ = fmt.Fprint(os.Stderr, err)
 					os.Exit(1)
 				}
-				openProjectTimeEntries, err := openproject.GetAllTimeEntries(config, openProjectUser, startDate, endDate)
+				openProjectTimeEntries, err := openproject.GetAllTimeEntries(config, openProjectUser, startDate, endDate, workpackages)
 				if err != nil {
 					_, _ = fmt.Fprint(os.Stderr, err)
 					os.Exit(1)
diff --git a/openproject/openproject.go b/openproject/openproject.go
index 3aba72a..27641a9 100644
--- a/openproject/openproject.go
+++ b/openproject/openproject.go
@@ -20,14 +20,15 @@ package openproject
 import (
 	"encoding/json"
 	"fmt"
+	"net/url"
+	"strconv"
+
 	"github.com/JankariTech/OpenProjectTmetricIntegration/config"
 	"github.com/go-resty/resty/v2"
 	"github.com/tidwall/gjson"
-	"net/url"
-	"strconv"
 )
 
-func GetAllTimeEntries(config *config.Config, user User, startDate string, endDate string) ([]TimeEntry, error) {
+func GetAllTimeEntries(config *config.Config, user User, startDate string, endDate string, workpackages []any) ([]TimeEntry, error) {
 	httpClient := resty.New()
 	openProjectUrl, _ := url.JoinPath(config.OpenProjectUrl, "/api/v3/time_entries")
 	var userString string
@@ -38,18 +39,20 @@ func GetAllTimeEntries(config *config.Config, user User, startDate string, endDa
 	} else {
 		userString = strconv.Itoa(user.Id)
 	}
+
+	filters := "["
+	if workpackages != nil && len(workpackages) > 0 {
+		entityIds, _ := json.Marshal(workpackages)
+		filters += fmt.Sprintf(`{"entity_id": {"operator":"=","values": %v}},`, string(entityIds))
+	}
+	// the operator is '<>d' ("\u003c\u003ed") and means between the dates
+	filters += fmt.Sprintf(`{"user":{"operator":"=","values":["%v"]}},{"spent_on":{"operator":"\u003c\u003ed","values":["%v","%v"]}}]`, userString, startDate, endDate)
 	resp, err := httpClient.R().
 		SetBasicAuth("apikey", config.OpenProjectToken).
 		SetHeader("Content-Type", "application/json").
 		SetQueryParam("pageSize", "3000").
 		SetQueryParam("sortBy", "[[\"updated_at\",\"asc\"]]").
-		// the operator is '<>d' and means between the dates
-		SetQueryParam("filters", fmt.Sprintf(
-			`[{"user":{"operator":"=","values":["%v"]}},{"spent_on":{"operator":"\u003c\u003ed","values":["%v","%v"]}}]`,
-			userString,
-			startDate,
-			endDate),
-		).
+		SetQueryParam("filters", filters).
 		Get(openProjectUrl)
 	if err != nil || resp.StatusCode() != 200 {
 		return nil, fmt.Errorf(
diff --git a/tmetric/report.go b/tmetric/report.go
index 00d9403..cf76fd5 100644
--- a/tmetric/report.go
+++ b/tmetric/report.go
@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"net/url"
 	"strconv"
+	"strings"
 	"time"
 
 	"github.com/JankariTech/OpenProjectTmetricIntegration/config"
@@ -12,9 +13,11 @@ import (
 )
 
 type ReportItem struct {
-	StartTime string `json:"startTime"`
-	EndTime   string `json:"endTime"`
-	User      string `json:"user"`
+	StartTime     string `json:"startTime"`
+	EndTime       string `json:"endTime"`
+	User          string `json:"user"`
+	IssueId       string `json:"issueId"`
+	WorkpackageId string
 }
 
 type Report struct {
@@ -118,6 +121,7 @@ func GetDetailedReport(
 	}
 	var report Report
 	for _, item := range reportItems {
+		item.WorkpackageId = strings.Trim(item.IssueId, "#") // remove leading '#' from issue id
 		report.ReportItems = append(report.ReportItems, item)
 		itemDuration, _ := item.getDuration()
 		report.Duration += itemDuration