diff --git a/README.md b/README.md
index a46c09f..983b71c 100644
--- a/README.md
+++ b/README.md
@@ -89,3 +89,6 @@ go run main.go export --template template.tmpl
 
 #### work for a specific time period
 By default, the script will work with the current calendar month, but the start and end date can be configured with the `--start` and `--end` flags. The date format is `YYYY-MM-DD`.
+
+#### filter by project
+To get the time entries of a specific project, use the `--project` flag with the name of the project. This flag can be used multiple times to include multiple projects.
diff --git a/cmd/export.go b/cmd/export.go
index e0d61f9..97eb97e 100644
--- a/cmd/export.go
+++ b/cmd/export.go
@@ -19,19 +19,21 @@ package cmd
 
 import (
 	"fmt"
-	"github.com/JankariTech/OpenProjectTmetricIntegration/config"
-	"github.com/JankariTech/OpenProjectTmetricIntegration/openproject"
-	"github.com/JankariTech/OpenProjectTmetricIntegration/tmetric"
-	"github.com/Masterminds/sprig/v3"
-	"github.com/spf13/cobra"
 	"os"
 	"path/filepath"
 	"strings"
 	"text/template"
 	"time"
+
+	"github.com/JankariTech/OpenProjectTmetricIntegration/config"
+	"github.com/JankariTech/OpenProjectTmetricIntegration/openproject"
+	"github.com/JankariTech/OpenProjectTmetricIntegration/tmetric"
+	"github.com/Masterminds/sprig/v3"
+	"github.com/spf13/cobra"
 )
 
 var arbitraryString []string
+var projects []string
 var tmplFile string
 
 var exportCmd = &cobra.Command{
@@ -58,7 +60,13 @@ var exportCmd = &cobra.Command{
 				return arbitraryString[i]
 			},
 			"DetailedReport": func(clientName string, tagName string, groupName string) tmetric.Report {
-				report, _ := tmetric.GetDetailedReport(config, tmetricUser, clientName, tagName, groupName, startDate, endDate)
+				report, err := tmetric.GetDetailedReport(
+					config, tmetricUser, clientName, tagName, groupName, startDate, endDate, projects,
+				)
+				if err != nil {
+					_, _ = fmt.Fprint(os.Stderr, err)
+					os.Exit(1)
+				}
 				return report
 			},
 			"AllWorkTypes": func() []tmetric.Tag {
@@ -133,4 +141,11 @@ func init() {
 	exportCmd.MarkFlagRequired("arbitraryString")
 	exportCmd.Flags().StringVarP(&tmplFile, "template", "t", today, "the template file")
 	exportCmd.MarkFlagRequired("template")
+	exportCmd.Flags().StringArrayVarP(
+		&projects,
+		"project",
+		"p",
+		nil,
+		"name of the tmetric project to include in the report (can be specified multiple times)",
+	)
 }
diff --git a/tmetric/report.go b/tmetric/report.go
index dc6875b..00d9403 100644
--- a/tmetric/report.go
+++ b/tmetric/report.go
@@ -3,11 +3,12 @@ package tmetric
 import (
 	"encoding/json"
 	"fmt"
-	"github.com/JankariTech/OpenProjectTmetricIntegration/config"
-	"github.com/go-resty/resty/v2"
 	"net/url"
 	"strconv"
 	"time"
+
+	"github.com/JankariTech/OpenProjectTmetricIntegration/config"
+	"github.com/go-resty/resty/v2"
 )
 
 type ReportItem struct {
@@ -55,7 +56,7 @@ func (reportItem *ReportItem) getDuration() (time.Duration, error) {
 }
 
 func GetDetailedReport(
-	config *config.Config, tmetricUser User, clientName string, tagName string, groupName string, startDate string, endDate string,
+	config *config.Config, tmetricUser User, clientName string, tagName string, groupName string, startDate string, endDate string, projects []string,
 ) (Report, error) {
 	client, err := getClientByName(config, tmetricUser, clientName)
 	if err != nil {
@@ -66,6 +67,17 @@ func GetDetailedReport(
 	if err != nil {
 		return Report{}, err
 	}
+
+	var projectsIds []string // we need a slice of strings for the URL parameters, so let's declare it a string slice
+	for _, projectName := range projects {
+		project, err := getProjectByName(config, tmetricUser, projectName)
+		if err != nil {
+			return Report{}, err
+		}
+
+		projectsIds = append(projectsIds, strconv.Itoa(project.Id))
+	}
+
 	httpClient := resty.New()
 	tmetricUrl, _ := url.JoinPath(config.TmetricAPIBaseUrl, "reports/detailed")
 	request := httpClient.R()
@@ -87,6 +99,9 @@ func GetDetailedReport(
 		SetQueryParam("AccountId", strconv.Itoa(tmetricUser.ActiveAccountId)).
 		SetQueryParam("ClientList", strconv.Itoa(client.Id)).
 		SetQueryParam("GroupList", strconv.Itoa(team.Id)).
+		SetQueryParamsFromValues(url.Values{
+			"ProjectList": projectsIds,
+		}).
 		SetQueryParam("StartDate", startDate).
 		SetQueryParam("EndDate", endDate).
 		Get(tmetricUrl)
diff --git a/tmetric/tmetric.go b/tmetric/tmetric.go
index 8490e5f..06df02b 100644
--- a/tmetric/tmetric.go
+++ b/tmetric/tmetric.go
@@ -3,12 +3,13 @@ package tmetric
 import (
 	"encoding/json"
 	"fmt"
-	"github.com/JankariTech/OpenProjectTmetricIntegration/config"
-	"github.com/go-resty/resty/v2"
 	"net/url"
 	"sort"
 	"strconv"
 	"strings"
+
+	"github.com/JankariTech/OpenProjectTmetricIntegration/config"
+	"github.com/go-resty/resty/v2"
 )
 
 // ClientV2 represents a client that is returned by the Tmetric API V2
@@ -26,6 +27,13 @@ type TagV2 struct {
 	IsWorkType bool   `json:"isWorkType"`
 }
 
+// ProjectV2 represents a project that is returned by the Tmetric API V2
+// see https://app.tmetric.com/api-docs/v2/#/ProjectsV2/projectsv2-get-api-accounts-accountid-projects
+type ProjectV2 struct {
+	Id   int    `json:"projectId"`
+	Name string `json:"projectName"`
+}
+
 type Team struct {
 	Name string `json:"name"`
 	Id   int    `json:"id"`
@@ -65,6 +73,40 @@ func getTeamByName(config *config.Config, tmetricUser User, name string) (Team,
 	return Team{}, fmt.Errorf("could not find any team with name '%v'", name)
 }
 
+func getAllProjects(config *config.Config, tmetricUser User) ([]ProjectV2, error) {
+	httpClient := resty.New()
+	tmetricUrl, _ := url.JoinPath(
+		config.TmetricAPIBaseUrl, "accounts/", strconv.Itoa(tmetricUser.ActiveAccountId), "/projects",
+	)
+	resp, err := httpClient.R().
+		SetAuthToken(config.TmetricToken).
+		Get(tmetricUrl)
+	if err != nil || resp.StatusCode() != 200 {
+		return nil, fmt.Errorf(
+			"cannot read projects from tmetric. Error: '%v'. HTTP status code: %v", err, resp.StatusCode(),
+		)
+	}
+	var projects []ProjectV2
+	err = json.Unmarshal(resp.Body(), &projects)
+	if err != nil {
+		return nil, fmt.Errorf("error parsing project response: %v\n", err)
+	}
+	return projects, nil
+}
+
+func getProjectByName(config *config.Config, tmetricUser User, name string) (ProjectV2, error) {
+	projects, err := getAllProjects(config, tmetricUser)
+	if err != nil {
+		return ProjectV2{}, err
+	}
+	for _, project := range projects {
+		if project.Name == name {
+			return project, nil
+		}
+	}
+	return ProjectV2{}, fmt.Errorf("could not find any project in tmetric with name '%v'", name)
+}
+
 func GetAllWorkTypes(config *config.Config, tmetricUser User) ([]Tag, error) {
 	httpClient := resty.New()
 	tmetricUrl, _ := url.JoinPath(