diff --git a/CMakeLists.txt b/CMakeLists.txt
index b3df84c91..9d6c96a8b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -248,7 +248,7 @@ if (NOT USE_PRE_BUILT_NGRAPH)
     ExternalProject_Add(
         ext_ngraph
         GIT_REPOSITORY https://github.com/NervanaSystems/ngraph
-        GIT_TAG e543688981ea2083a260929a70420f5ba6984d95
+        GIT_TAG v0.27.1-rc.0
         CMAKE_ARGS 
             -DNGRAPH_DISTRIBUTED_ENABLE=${NGRAPH_DISTRIBUTED_ENABLE}
             -DNGRAPH_INSTALL_PREFIX=${NGRAPH_ARTIFACTS_DIR}
diff --git a/README.md b/README.md
index 714a5bf38..87bb44a18 100644
--- a/README.md
+++ b/README.md
@@ -88,7 +88,7 @@ Once TensorFlow's dependencies are installed, clone the `ngraph-bridge` repo:
 
         git clone https://github.com/tensorflow/ngraph-bridge.git
         cd ngraph-bridge
-        git checkout v0.21.0-rc0
+        git checkout v0.21.0-rc1
 
 Run the following Python script to build TensorFlow, nGraph, and the bridge. Use Python 3.5:
 
diff --git a/bazel/WORKSPACE b/bazel/WORKSPACE
index af84de337..8b4bb9eb1 100644
--- a/bazel/WORKSPACE
+++ b/bazel/WORKSPACE
@@ -55,11 +55,11 @@ tf_workspace(path_prefix = "", tf_repo_name = "org_tensorflow")
 http_archive(
     name = "ngraph",
     build_file = "//:bazel/ngraph.BUILD",
-    sha256 = "b178f456dcfb212e0ab97fbb9b60efe35e749c8c361234bf2810c71083b8c455",
-    strip_prefix = "ngraph-e543688981ea2083a260929a70420f5ba6984d95",
+    sha256 = "facce2ccb12688961a4899272908522db526a1fb210fd6c4c6ef15a6c5e39940",
+    strip_prefix = "ngraph-0.27.1-rc.0",
     urls = [
-        "https://mirror.bazel.build/github.com/NervanaSystems/ngraph/archive/e543688981ea2083a260929a70420f5ba6984d95.tar.gz",
-        "https://github.com/NervanaSystems/ngraph/archive/e543688981ea2083a260929a70420f5ba6984d95.tar.gz"
+        "https://mirror.bazel.build/github.com/NervanaSystems/ngraph/archive/v0.27.1-rc.0.tar.gz",
+        "https://github.com/NervanaSystems/ngraph/archive/v0.27.1-rc.0.tar.gz"
     ],
 )
 
diff --git a/bazel/ngraph.BUILD b/bazel/ngraph.BUILD
index 318824c7a..8c55dfa77 100644
--- a/bazel/ngraph.BUILD
+++ b/bazel/ngraph.BUILD
@@ -68,7 +68,7 @@ cc_library(
         "-fstack-protector-all",
         '-D SHARED_LIB_PREFIX=\\"lib\\"',
         '-D SHARED_LIB_SUFFIX=\\".so\\"',
-        '-D NGRAPH_VERSION=\\"e543688981ea2083a260929a70420f5ba6984d95\\"',
+        '-D NGRAPH_VERSION=\\"v0.27.1-rc.0\\"',
         "-D NGRAPH_DEX_ONLY",
         '-D PROJECT_ROOT_DIR=\\"\\"',
         '-D NGRAPH_STATIC_LIB_ENABLE',
@@ -111,7 +111,7 @@ cc_library(
         "-fstack-protector-all",
         '-D SHARED_LIB_PREFIX=\\"lib\\"',
         '-D SHARED_LIB_SUFFIX=\\".so\\"',
-        '-D NGRAPH_VERSION=\\"e543688981ea2083a260929a70420f5ba6984d95\\"',
+        '-D NGRAPH_VERSION=\\"v0.27.1-rc.0\\"',
         "-D NGRAPH_DEX_ONLY",
         '-D PROJECT_ROOT_DIR=\\"\\"',
     ] + CXX_ABI,
@@ -150,6 +150,7 @@ cc_library(
         "src/ngraph/runtime/cpu/cpu_tensor_view.cpp",
         "src/ngraph/runtime/cpu/cpu_tracing.cpp",
         "src/ngraph/runtime/cpu/cpu_visualize_tree.cpp",
+        "src/ngraph/runtime/cpu/builder/cum_sum.cpp",
         "src/ngraph/runtime/cpu/cpu_cse.cpp",
         "src/ngraph/runtime/cpu/cpu_debugger.cpp",
         "src/ngraph/runtime/cpu/builder/add.cpp",
@@ -268,7 +269,7 @@ cc_library(
         "-fstack-protector-all",
         '-D SHARED_LIB_PREFIX=\\"lib\\"',
         '-D SHARED_LIB_SUFFIX=\\".so\\"',
-        '-D NGRAPH_VERSION=\\"v0.27.0-rc.0\\"',
+        '-D NGRAPH_VERSION=\\"v0.27.1-rc.0\\"',
         "-D NGRAPH_DEX_ONLY",
         '-D PROJECT_ROOT_DIR=\\"\\"',
         '-D NGRAPH_CPU_STATIC_LIB_ENABLE',
diff --git a/build_ngtf.py b/build_ngtf.py
index 58c207b59..8c96b6371 100755
--- a/build_ngtf.py
+++ b/build_ngtf.py
@@ -53,7 +53,7 @@ def main():
     '''
 
     # Component versions
-    ngraph_version = "e543688981ea2083a260929a70420f5ba6984d95"  # Nagy Mostafa [MLIR] Fused Ops dialect declaration (#3860)
+    ngraph_version = "v0.27.1-rc.0"
     tf_version = "v1.14.0"
 
     # Command line parser options
diff --git a/python/setup.in.py b/python/setup.in.py
index f748de1b3..6c4ab4832 100644
--- a/python/setup.in.py
+++ b/python/setup.in.py
@@ -59,7 +59,7 @@ def get_tag(self):
 
 setup( 
     name='ngraph_tensorflow_bridge',
-    version='0.21.0rc1',
+    version='0.21.0rc2',
     description='Intel nGraph compiler and runtime for TensorFlow',
     long_description=long_description,
     long_description_content_type="text/markdown",