diff --git a/curl-sys/Cargo.toml b/curl-sys/Cargo.toml
index 5dcc375c7..b2e2f2236 100644
--- a/curl-sys/Cargo.toml
+++ b/curl-sys/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "curl-sys"
-version = "0.4.77+curl-8.10.1"
+version = "0.4.78+curl-8.11.0"
 authors = ["Alex Crichton <alex@alexcrichton.com>"]
 links = "curl"
 build = "build.rs"
diff --git a/curl-sys/build.rs b/curl-sys/build.rs
index fa57dd9b2..a451b2440 100644
--- a/curl-sys/build.rs
+++ b/curl-sys/build.rs
@@ -108,7 +108,7 @@ fn main() {
             .replace("@LIBCURL_LIBS@", "")
             .replace("@SUPPORT_FEATURES@", "")
             .replace("@SUPPORT_PROTOCOLS@", "")
-            .replace("@CURLVERSION@", "8.10.1"),
+            .replace("@CURLVERSION@", "8.11.0"),
     )
     .unwrap();
 
@@ -132,7 +132,7 @@ fn main() {
         .define("ENABLE_IPV6", None)
         .define("HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID", None)
         .define("HAVE_ASSERT_H", None)
-        .define("OS", "\"unknown\"") // TODO
+        .define("CURL_OS", "\"unknown\"") // TODO
         .define("HAVE_ZLIB_H", None)
         .define("HAVE_LONGLONG", None)
         .define("HAVE_LIBZ", None)
@@ -236,6 +236,7 @@ fn main() {
         .file("curl/lib/vtls/vtls.c")
         .file("curl/lib/warnless.c")
         .file("curl/lib/timediff.c")
+        .file("curl/lib/ws.c")
         .define("HAVE_GETADDRINFO", None)
         .define("HAVE_GETPEERNAME", None)
         .define("HAVE_GETSOCKNAME", None)
diff --git a/curl-sys/curl b/curl-sys/curl
index 7eb8c0484..b1ef0e1a0 160000
--- a/curl-sys/curl
+++ b/curl-sys/curl
@@ -1 +1 @@
-Subproject commit 7eb8c048470ed2cc14dca75be9c1cdae7ac8498b
+Subproject commit b1ef0e1a01c0bb6ee5367bd9c186a603bde3615a