diff --git a/internal/forgejo/repo.go b/internal/forgejo/repo.go
index 840b4f0..a90eb48 100644
--- a/internal/forgejo/repo.go
+++ b/internal/forgejo/repo.go
@@ -42,7 +42,7 @@ type pullRequestRequest struct {
 }
 
 type pullRequest struct {
-	Index int `json:"index"`
+	Number int `json:"number"`
 }
 
 type mergePullRequestRequest struct {
@@ -216,7 +216,7 @@ func (rm *RepoManager) MergePullRequest(repo, head string) error {
 	if err != nil {
 		return err
 	}
-	status, err = rm.apiRequest(http.MethodPost, fmt.Sprintf("%s/api/v1/repos/%s/%s/pulls/%d/merge", rm.BaseURL, rm.Owner, repo, pullRequests[0].Index), body)
+	status, err = rm.apiRequest(http.MethodPost, fmt.Sprintf("%s/api/v1/repos/%s/%s/pulls/%d/merge", rm.BaseURL, rm.Owner, repo, pullRequests[0].Number), body)
 	if err != nil {
 		return err
 	}
diff --git a/internal/forgejo/repo_test.go b/internal/forgejo/repo_test.go
index 8dd8512..24626af 100644
--- a/internal/forgejo/repo_test.go
+++ b/internal/forgejo/repo_test.go
@@ -132,7 +132,7 @@ func TestMergePullRequest(t *testing.T) {
 	server := httptest.NewServer(http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
 		switch request.Method {
 		case http.MethodGet:
-			_ = json.NewEncoder(writer).Encode([]pullRequest{{Index: 4}})
+			_ = json.NewEncoder(writer).Encode([]pullRequest{{Number: 4}})
 		case http.MethodPost:
 			var body mergePullRequestRequest
 			if err := json.NewDecoder(request.Body).Decode(&body); err != nil {