diff --git a/pkg/github/pullrequests.go b/pkg/github/pullrequests.go
index 0f6270f33..d608b12c7 100644
--- a/pkg/github/pullrequests.go
+++ b/pkg/github/pullrequests.go
@@ -1217,7 +1217,14 @@ func ListPullRequests(t translations.TranslationHelperFunc) inventory.ServerTool
 				}
 			}
 
-			r, err := json.Marshal(prs)
+			minimalPRs := make([]MinimalPullRequest, 0, len(prs))
+			for _, pr := range prs {
+				if pr != nil {
+					minimalPRs = append(minimalPRs, convertToMinimalPullRequest(pr))
+				}
+			}
+
+			r, err := json.Marshal(minimalPRs)
 			if err != nil {
 				return utils.NewToolResultErrorFromErr("failed to marshal response", err), nil, nil
 			}
diff --git a/pkg/github/pullrequests_test.go b/pkg/github/pullrequests_test.go
index 1528fd77e..4bb31e541 100644
--- a/pkg/github/pullrequests_test.go
+++ b/pkg/github/pullrequests_test.go
@@ -671,16 +671,16 @@ func Test_ListPullRequests(t *testing.T) {
 			textContent := getTextResult(t, result)
 
 			// Unmarshal and verify the result
-			var returnedPRs []*github.PullRequest
+			var returnedPRs []MinimalPullRequest
 			err = json.Unmarshal([]byte(textContent.Text), &returnedPRs)
 			require.NoError(t, err)
 			assert.Len(t, returnedPRs, 2)
-			assert.Equal(t, *tc.expectedPRs[0].Number, *returnedPRs[0].Number)
-			assert.Equal(t, *tc.expectedPRs[0].Title, *returnedPRs[0].Title)
-			assert.Equal(t, *tc.expectedPRs[0].State, *returnedPRs[0].State)
-			assert.Equal(t, *tc.expectedPRs[1].Number, *returnedPRs[1].Number)
-			assert.Equal(t, *tc.expectedPRs[1].Title, *returnedPRs[1].Title)
-			assert.Equal(t, *tc.expectedPRs[1].State, *returnedPRs[1].State)
+			assert.Equal(t, *tc.expectedPRs[0].Number, returnedPRs[0].Number)
+			assert.Equal(t, *tc.expectedPRs[0].Title, returnedPRs[0].Title)
+			assert.Equal(t, *tc.expectedPRs[0].State, returnedPRs[0].State)
+			assert.Equal(t, *tc.expectedPRs[1].Number, returnedPRs[1].Number)
+			assert.Equal(t, *tc.expectedPRs[1].Title, returnedPRs[1].Title)
+			assert.Equal(t, *tc.expectedPRs[1].State, returnedPRs[1].State)
 		})
 	}
 }