diff --git a/tensorflow/workspace2.bzl b/tensorflow/workspace2.bzl
index 245a64d0f50..763e9b263d4 100644
--- a/tensorflow/workspace2.bzl
+++ b/tensorflow/workspace2.bzl
@@ -612,12 +612,12 @@ def _tf_repositories():
     tf_http_archive(
         name = "curl",
         build_file = "//third_party:curl.BUILD",
-        sha256 = "3b4378156ba09e224008e81dcce854b7ce4d182b1f9cfb97fe5ed9e9c18c6bd3",
-        strip_prefix = "curl-7.76.0",
+        sha256 = "b0a3428acb60fa59044c4d0baae4e4fc09ae9af1d8a3aa84b2e3fbcd99841f77",
+        strip_prefix = "curl-7.77.0",
         system_build_file = "//third_party/systemlibs:curl.BUILD",
         urls = [
-            "https://storage.googleapis.com/mirror.tensorflow.org/curl.haxx.se/download/curl-7.76.0.tar.gz",
-            "https://curl.haxx.se/download/curl-7.76.0.tar.gz",
+            "https://storage.googleapis.com/mirror.tensorflow.org/curl.haxx.se/download/curl-7.77.0.tar.gz",
+            "https://curl.haxx.se/download/curl-7.77.0.tar.gz",
         ],
     )
 
diff --git a/third_party/curl.BUILD b/third_party/curl.BUILD
index 3b73ac7d29f..85b09cf1bf4 100644
--- a/third_party/curl.BUILD
+++ b/third_party/curl.BUILD
@@ -40,6 +40,8 @@ cc_library(
         "lib/asyn-ares.c",
         "lib/asyn.h",
         "lib/base64.c",
+        "lib/bufref.c",
+        "lib/bufref.h",
         "lib/c-hyper.c",
         "lib/c-hyper.h",
         "lib/config-amigaos.h",