diff --git a/.gitignore b/.gitignore
index 3cbf5bc..5d009e7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -49,3 +49,4 @@ TestUser51.cert
 /nss-3.51.tar.gz
 /nss-3.51.1.tar.gz
 /nss-3.52.tar.gz
+/nss-3.53.tar.gz
diff --git a/nss-kremlin-ppc64le.patch b/nss-kremlin-ppc64le.patch
deleted file mode 100644
index b5f4700..0000000
--- a/nss-kremlin-ppc64le.patch
+++ /dev/null
@@ -1,31 +0,0 @@
-Index: nss/lib/freebl/verified/kremlin/include/kremlin/internal/types.h
-===================================================================
---- nss.orig/lib/freebl/verified/kremlin/include/kremlin/internal/types.h
-+++ nss/lib/freebl/verified/kremlin/include/kremlin/internal/types.h
-@@ -56,9 +56,10 @@ typedef const char *Prims_string;
-     !defined(__clang__)
- #include <emmintrin.h>
- typedef __m128i FStar_UInt128_uint128;
--#elif !defined(KRML_VERIFIED_UINT128) && !defined(_MSC_VER) &&           \
-+#elif !defined(KRML_VERIFIED_UINT128) && !defined(_MSC_VER) && \
-     (defined(__x86_64__) || defined(__x86_64) || defined(__aarch64__) || \
--     (defined(__powerpc64__) && defined(__LITTLE_ENDIAN__)))
-+    (defined(__powerpc64__) && defined(__LITTLE_ENDIAN__)) || \
-+     defined(__s390x__))
- typedef unsigned __int128 FStar_UInt128_uint128;
- #elif !defined(KRML_VERIFIED_UINT128) && defined(_MSC_VER) && defined(__clang__)
- typedef __uint128_t FStar_UInt128_uint128;
-Index: nss/lib/freebl/verified/kremlin/kremlib/dist/minimal/fstar_uint128_gcc64.h
-===================================================================
---- nss.orig/lib/freebl/verified/kremlin/kremlib/dist/minimal/fstar_uint128_gcc64.h
-+++ nss/lib/freebl/verified/kremlin/kremlib/dist/minimal/fstar_uint128_gcc64.h
-@@ -26,7 +26,8 @@
- 
- #if !defined(KRML_VERIFIED_UINT128) && (!defined(_MSC_VER) || defined(__clang__)) && \
-     (defined(__x86_64__) || defined(__x86_64) || defined(__aarch64__) ||             \
--     (defined(__powerpc64__) && defined(__LITTLE_ENDIAN__)))
-+    (defined(__powerpc64__) && defined(__LITTLE_ENDIAN__)) || \
-+     defined(__s390x__))
- 
- /* GCC + using native unsigned __int128 support */
- 
diff --git a/nss.spec b/nss.spec
index d7d288f..ddb157d 100644
--- a/nss.spec
+++ b/nss.spec
@@ -1,5 +1,5 @@
 %global nspr_version 4.25.0
-%global nss_version 3.52.0
+%global nss_version 3.53.0
 %global unsupported_tools_directory %{_libdir}/nss/unsupported-tools
 %global saved_files_dir %{_libdir}/nss/saved
 %global dracutlibdir %{_prefix}/lib/dracut
@@ -44,7 +44,7 @@ rpm.define(string.format("nss_release_tag NSS_%s_RTM",
 Summary:          Network Security Services
 Name:             nss
 Version:          %{nss_version}
-Release:          2%{?dist}
+Release:          1%{?dist}
 License:          MPLv2.0
 URL:              http://www.mozilla.org/projects/security/pki/nss/
 Requires:         nspr >= %{nspr_version}
@@ -107,8 +107,6 @@ Patch2:           nss-539183.patch
 # but it doesn't hurt to keep it.
 Patch4:           iquote.patch
 Patch12:          nss-signtool-format.patch
-# https://github.com/FStarLang/kremlin/issues/166
-Patch13:          nss-kremlin-ppc64le.patch
 %if 0%{?fedora} < 34
 %if 0%{?rhel} < 9
 Patch20:          nss-gcm-param-default-pkcs11v2.patch
@@ -892,6 +890,9 @@ update-crypto-policies &> /dev/null || :
 
 
 %changelog
+* Mon Jun  1 2020 Daiki Ueno <dueno@redhat.com> - 3.53.0-1
+- Update to NSS 3.53
+
 * Wed May 13 2020 Bob Relyea <rrelyea@redhat.com> - 3.52.0-2
 - Delay CK_GCM_PARAMS semantics until fedora 34
 
diff --git a/sources b/sources
index 2f019bb..77bf7ca 100644
--- a/sources
+++ b/sources
@@ -3,4 +3,4 @@ SHA512 (blank-cert9.db) = 2f8eab4c0612210ee47db8a3a80c1b58a0b43849551af78c7da403
 SHA512 (blank-key3.db) = 01f7314e9fc8a7c9aa997652624cfcde213d18a6b3bb31840c1a60bbd662e56b5bc3221d13874abb42ce78163b225a6dfce2e1326cf6dd29366ad9c28ba5a71c
 SHA512 (blank-key4.db) = 8fedae93af7163da23fe9492ea8e785a44c291604fa98e58438448efb69c85d3253fc22b926d5c3209c62e58a86038fd4d78a1c4c068bc00600a7f3e5382ebe7
 SHA512 (blank-secmod.db) = 06a2dbd861839ef6315093459328b500d3832333a34b30e6fac4a2503af337f014a4d319f0f93322409e719142904ce8bc08252ae9a4f37f30d4c3312e900310
-SHA512 (nss-3.52.tar.gz) = a45baf38717bceda03c292b2c01def680a24a846327e17d36044a85e30ed40c68220c78c0a2c3025c11778ee58f5d5eb0fff1b4cd274b95c408fb59e394e62c6
+SHA512 (nss-3.53.tar.gz) = 280edf24356b764584200bff949af4a7f88514ee8ac80bf5348a9a844a8b1eb263e9aa1d772644bd8bb1bd195c12b6cc173280cfc88cd97e56562e1c40e71503