VERSION                |  2 +-
 doc/news.rst           |  7 +++++++
 pyderasn.py            | 10 ++++++++--
 tests/test_pyderasn.py | 14 ++++++++++++++

diff --git a/VERSION b/VERSION
index 6a1b5285d8889b376acd99a56a8fb62459e80c19242602e88db438447dd26893..16b82d309b48a976371f94d825480574f44d825f4546bf7cdfad0243ec3cac31 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-3.10
+3.11
diff --git a/doc/news.rst b/doc/news.rst
index 825f515234f0277745af3dbcc0e588a79923d1037515e9d3f413eb8ff91389c2..9249f1ae8ba432fc118d442025023379104bd1e81fed48eb754983acfd686c44 100644
--- a/doc/news.rst
+++ b/doc/news.rst
@@ -1,6 +1,13 @@
 News
 ====
 
+.. _release3.11:
+
+3.11
+----
+* Fix uncaught UTCTime/GeneralizedTime decode error when dealing with
+  non ASCII-encoded values
+
 .. _release3.10:
 
 3.10
diff --git a/pyderasn.py b/pyderasn.py
index c98c35301d69f8d7db5b3b8fb9bca80b290dae7fd1222c270f1357133a76950a..3ba7264acecca33a7f96f1607d171952e8f542caacda2da5b2134bbea49dd2f4 100755
--- a/pyderasn.py
+++ b/pyderasn.py
@@ -3522,7 +3522,10 @@             return value._value
         if isinstance(value, datetime):
             return value.strftime(self.fmt).encode("ascii")
         if isinstance(value, binary_type):
-            value_decoded = value.decode("ascii")
+            try:
+                value_decoded = value.decode("ascii")
+            except (UnicodeEncodeError, UnicodeDecodeError) as err:
+                raise DecodeError("invalid UTCTime encoding")
             if len(value_decoded) == LEN_YYMMDDHHMMSSZ:
                 try:
                     datetime.strptime(value_decoded, self.fmt)
@@ -3620,7 +3623,10 @@             return value.strftime(
                 self.fmt_ms if value.microsecond > 0 else self.fmt
             ).encode("ascii")
         if isinstance(value, binary_type):
-            value_decoded = value.decode("ascii")
+            try:
+                value_decoded = value.decode("ascii")
+            except (UnicodeEncodeError, UnicodeDecodeError) as err:
+                raise DecodeError("invalid GeneralizedTime encoding")
             if len(value_decoded) == LEN_YYYYMMDDHHMMSSZ:
                 try:
                     datetime.strptime(value_decoded, self.fmt)
diff --git a/tests/test_pyderasn.py b/tests/test_pyderasn.py
index 1e732f4ce948462b1d27b89df9437c4374bb13ece827f0d240a2b14b57ccc477..1adae843fd2167b422868d484d53a37610c5401eac9344b8876c4f0672f06964 100644
--- a/tests/test_pyderasn.py
+++ b/tests/test_pyderasn.py
@@ -3609,6 +3609,13 @@             GeneralizedTime(b"20100102030405Z").todatetime(),
             datetime(2010, 1, 2, 3, 4, 5, 0),
         )
 
+    def test_encoding(self):
+        raw = GeneralizedTime(b"20100102030405Z").encode()
+        with assertRaisesRegex(self, DecodeError, "encoding"):
+            GeneralizedTime().decode(raw.replace(b"201001", "привет".encode("utf-8")))
+        with self.assertRaises(DecodeError):
+            GeneralizedTime().decode(raw.replace(b"20100", b"hello"))
+
 
 class TestUTCTime(TimeMixin, CommonMixin, TestCase):
     base_klass = UTCTime
@@ -3672,6 +3679,13 @@         self.assertEqual(
             UTCTime(("%02d1231235959Z" % year).encode("ascii")).todatetime().year,
             1900 + year,
         )
+
+    def test_encoding(self):
+        raw = UTCTime(b"910506234540Z").encode()
+        with assertRaisesRegex(self, DecodeError, "encoding"):
+            UTCTime().decode(raw.replace(b"910506", "привет".encode("utf-8")))
+        with self.assertRaises(DecodeError):
+            UTCTime().decode(raw.replace(b"91050", b"hello"))
 
 
 @composite