diff --git a/docs/performance.md b/docs/performance.md
index 3ff42425..c1556e59 100644
--- a/docs/performance.md
+++ b/docs/performance.md
@@ -10,7 +10,7 @@ Currently, pkpy is almost~ fast as cpython 3.8. Here is a benchmark result of a
 
 Benchmark files are located in `benchmarks/`.
 
-https://github.com/blueloveTH/pocketpy/actions/runs/4729609975/jobs/8392313856
+See [actions/runs/4729609975/jobs/8392313856](https://github.com/blueloveTH/pocketpy/actions/runs/4729609975/jobs/8392313856).
 
 
 ```
diff --git a/docs/quick-start/interop.md b/docs/quick-start/interop.md
index 0183b5c0..346dabf6 100644
--- a/docs/quick-start/interop.md
+++ b/docs/quick-start/interop.md
@@ -37,7 +37,7 @@ std::cout << CAST(Str, i);	// abc
 
 ### Type check
 
-+ `is_type(PyObject* obj, Type type)`
-+ `is_non_tagged_type(PyObject* obj, Type type)`
-+ `VM::check_type(PyObject* obj, Type type)`
-+ `VM::check_non_tagged_type(PyObject* obj, Type type)`
\ No newline at end of file
++ `bool is_type(PyObject* obj, Type type)`
++ `bool is_non_tagged_type(PyObject* obj, Type type)`
++ `void VM::check_type(PyObject* obj, Type type)` throws `TypeError` on failure
++ `void VM::check_non_tagged_type(PyObject* obj, Type type)` throws `TypeError` on failure
\ No newline at end of file