diff --git a/option/requestoption.go b/option/requestoption.go
index 05868a8..f2bebaa 100644
--- a/option/requestoption.go
+++ b/option/requestoption.go
@@ -9,6 +9,7 @@ import (
 	"log"
 	"net/http"
 	"net/url"
+	"strings"
 	"time"
 
 	"github.com/gitpod-io/gitpod-sdk-go/internal/requestconfig"
@@ -29,6 +30,9 @@ func WithBaseURL(base string) RequestOption {
 		log.Fatalf("failed to parse BaseURL: %s\n", err)
 	}
 	return func(r *requestconfig.RequestConfig) error {
+		if u.Path != "" && !strings.HasSuffix(u.Path, "/") {
+			u.Path += "/"
+		}
 		r.BaseURL = u
 		return nil
 	}