diff --git a/deps/ngtcp2/ngtcp2/lib/includes/ngtcp2/ngtcp2.h b/deps/ngtcp2/ngtcp2/lib/includes/ngtcp2/ngtcp2.h
index a8d4b4afd3a470..f16d15cb39bb52 100644
--- a/deps/ngtcp2/ngtcp2/lib/includes/ngtcp2/ngtcp2.h
+++ b/deps/ngtcp2/ngtcp2/lib/includes/ngtcp2/ngtcp2.h
@@ -4269,9 +4269,6 @@ NGTCP2_EXTERN int ngtcp2_conn_open_uni_stream(ngtcp2_conn *conn,
  *
  * |flags| is currently unused, and should be set to 0.
  *
- * This function returns 0 if a stream denoted by |stream_id| is not
- * found.
- *
  * This function returns 0 if it succeeds, or one of the following
  * negative error codes:
  *
@@ -4294,9 +4291,6 @@ NGTCP2_EXTERN int ngtcp2_conn_shutdown_stream(ngtcp2_conn *conn, uint32_t flags,
  *
  * |flags| is currently unused, and should be set to 0.
  *
- * This function returns 0 if a stream denoted by |stream_id| is not
- * found.
- *
  * This function returns 0 if it succeeds, or one of the following
  * negative error codes:
  *
@@ -4321,9 +4315,6 @@ NGTCP2_EXTERN int ngtcp2_conn_shutdown_stream_write(ngtcp2_conn *conn,
  *
  * |flags| is currently unused, and should be set to 0.
  *
- * This function returns 0 if a stream denoted by |stream_id| is not
- * found.
- *
  * This function returns 0 if it succeeds, or one of the following
  * negative error codes:
  *
@@ -4684,9 +4675,6 @@ NGTCP2_EXTERN int ngtcp2_conn_in_draining_period(ngtcp2_conn *conn);
  * specifies the stream ID.  This function only extends stream-level
  * flow control window.
  *
- * This function returns 0 if a stream denoted by |stream_id| is not
- * found.
- *
  * This function returns 0 if it succeeds, or one of the following
  * negative error codes:
  *
diff --git a/deps/ngtcp2/ngtcp2/lib/includes/ngtcp2/version.h b/deps/ngtcp2/ngtcp2/lib/includes/ngtcp2/version.h
index 9f7592b84a4585..66a70ffe962964 100644
--- a/deps/ngtcp2/ngtcp2/lib/includes/ngtcp2/version.h
+++ b/deps/ngtcp2/ngtcp2/lib/includes/ngtcp2/version.h
@@ -36,7 +36,7 @@
  *
  * Version number of the ngtcp2 library release.
  */
-#define NGTCP2_VERSION "0.8.1"
+#define NGTCP2_VERSION "1.1.0"
 
 /**
  * @macro
@@ -46,6 +46,6 @@
  * number, 8 bits for minor and 8 bits for patch. Version 1.2.3
  * becomes 0x010203.
  */
-#define NGTCP2_VERSION_NUM 0x000801
+#define NGTCP2_VERSION_NUM 0x010100
 
 #endif /* VERSION_H */