diff --git a/docs/library/uhashlib.rst b/docs/library/hashlib.rst
similarity index 91%
rename from docs/library/uhashlib.rst
rename to docs/library/hashlib.rst
index d0a3422a21..0205d5e6a8 100644
--- a/docs/library/uhashlib.rst
+++ b/docs/library/hashlib.rst
@@ -1,9 +1,9 @@
-:mod:`uhashlib` -- hashing algorithms
+:mod:`hashlib` -- hashing algorithms
 =====================================
 
 .. include:: ../templates/unsupported_in_circuitpython.inc
 
-.. module:: uhashlib
+.. module:: hashlib
    :synopsis: hashing algorithms
 
 |see_cpython_module| :mod:`cpython:hashlib`.
@@ -29,15 +29,15 @@ be implemented:
 Constructors
 ------------
 
-.. class:: uhashlib.sha256([data])
+.. class:: hashlib.sha256([data])
 
     Create an SHA256 hasher object and optionally feed ``data`` into it.
 
-.. class:: uhashlib.sha1([data])
+.. class:: hashlib.sha1([data])
 
     Create an SHA1 hasher object and optionally feed ``data`` into it.
 
-.. class:: uhashlib.md5([data])
+.. class:: hashlib.md5([data])
 
     Create an MD5 hasher object and optionally feed ``data`` into it.
 
diff --git a/docs/library/index.rst b/docs/library/index.rst
index 804bff93c4..466068640d 100644
--- a/docs/library/index.rst
+++ b/docs/library/index.rst
@@ -23,7 +23,7 @@ Python standard libraries and micro-libraries
    binascii.rst
    ucollections.rst
    uerrno.rst
-   uhashlib.rst
+   hashlib.rst
    uheapq.rst
    uio.rst
    ujson.rst
diff --git a/extmod/moduhashlib.c b/extmod/moduhashlib.c
index 3fad69247e..7ae42a15f1 100644
--- a/extmod/moduhashlib.c
+++ b/extmod/moduhashlib.c
@@ -36,6 +36,14 @@
 #include "lib/axtls/crypto/crypto.h"
 #endif
 
+static void check_not_unicode(const mp_obj_t arg) {
+#if MICROPY_CPYTHON_COMPAT
+    if (MP_OBJ_IS_STR(arg)) {
+        mp_raise_TypeError("a bytes-like object is required");
+    }
+#endif
+}
+
 typedef struct _mp_obj_hash_t {
     mp_obj_base_t base;
     char state[0];
@@ -70,6 +78,7 @@ STATIC mp_obj_t sha1_make_new(const mp_obj_type_t *type, size_t n_args, size_t n
 #endif
 
 STATIC mp_obj_t hash_update(mp_obj_t self_in, mp_obj_t arg) {
+    check_not_unicode(arg);
     mp_obj_hash_t *self = MP_OBJ_TO_PTR(self_in);
     mp_buffer_info_t bufinfo;
     mp_get_buffer_raise(arg, &bufinfo, MP_BUFFER_READ);
@@ -80,6 +89,7 @@ MP_DEFINE_CONST_FUN_OBJ_2(hash_update_obj, hash_update);
 
 #if MICROPY_PY_UHASHLIB_SHA1
 STATIC mp_obj_t sha1_update(mp_obj_t self_in, mp_obj_t arg) {
+    check_not_unicode(arg);
     mp_obj_hash_t *self = MP_OBJ_TO_PTR(self_in);
     mp_buffer_info_t bufinfo;
     mp_get_buffer_raise(arg, &bufinfo, MP_BUFFER_READ);
@@ -139,7 +149,7 @@ STATIC const mp_obj_type_t sha1_type = {
 #endif
 
 STATIC const mp_rom_map_elem_t mp_module_hashlib_globals_table[] = {
-    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_uhashlib) },
+    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_hashlib) },
     { MP_ROM_QSTR(MP_QSTR_sha256), MP_ROM_PTR(&sha256_type) },
     #if MICROPY_PY_UHASHLIB_SHA1
     { MP_ROM_QSTR(MP_QSTR_sha1), MP_ROM_PTR(&sha1_type) },
diff --git a/py/objmodule.c b/py/objmodule.c
index 0394d7cbb6..3bea196444 100644
--- a/py/objmodule.c
+++ b/py/objmodule.c
@@ -199,7 +199,7 @@ STATIC const mp_rom_map_elem_t mp_builtin_module_table[] = {
     { MP_ROM_QSTR(MP_QSTR_utimeq), MP_ROM_PTR(&mp_module_utimeq) },
 #endif
 #if MICROPY_PY_UHASHLIB
-    { MP_ROM_QSTR(MP_QSTR_uhashlib), MP_ROM_PTR(&mp_module_uhashlib) },
+    { MP_ROM_QSTR(MP_QSTR_hashlib), MP_ROM_PTR(&mp_module_uhashlib) },
 #endif
 #if MICROPY_PY_UBINASCII
     { MP_ROM_QSTR(MP_QSTR_binascii), MP_ROM_PTR(&mp_module_ubinascii) },
diff --git a/shared-bindings/index.rst b/shared-bindings/index.rst
index 38e26191d2..76b5e340b8 100644
--- a/shared-bindings/index.rst
+++ b/shared-bindings/index.rst
@@ -29,6 +29,7 @@ Module             Supported Ports
 `busio`            **All Supported**
 `digitalio`        **All Supported**
 `gamepad`          **SAMD Express, nRF**
+`hashlib`          **ESP8266**
 `math`             **All Supported**
 `microcontroller`  **All Supported**
 `multiterminal`    **ESP8266**
diff --git a/tests/extmod/uhashlib_sha1.py b/tests/extmod/uhashlib_sha1.py
index 4f7066899a..9d6427b33f 100644
--- a/tests/extmod/uhashlib_sha1.py
+++ b/tests/extmod/uhashlib_sha1.py
@@ -19,3 +19,10 @@ except AttributeError:
 sha1 = hashlib.sha1(b'hello')
 sha1.update(b'world')
 print(sha1.digest())
+
+sha1 = hashlib.sha1(b'hello')
+try:
+    sha1.update(u'world')
+except TypeError as e:
+    print("TypeError")
+print(sha1.digest())
diff --git a/tests/extmod/uhashlib_sha256.py b/tests/extmod/uhashlib_sha256.py
index 3200e8f5cd..0322c20de4 100644
--- a/tests/extmod/uhashlib_sha256.py
+++ b/tests/extmod/uhashlib_sha256.py
@@ -23,6 +23,13 @@ print(h.digest())
 
 print(hashlib.sha256(b"\xff" * 64).digest())
 
+sha256 = hashlib.sha256(b'hello')
+try:
+    sha256.update(u'world')
+except TypeError as e:
+    print("TypeError")
+print(sha256.digest())
+
 # TODO: running .digest() several times in row is not supported()
 #h = hashlib.sha256(b'123')
 #print(h.digest())