diff --git a/.gitignore b/.gitignore
index 20c9c69..c2961be 100644
--- a/.gitignore
+++ b/.gitignore
@@ -51,3 +51,4 @@ TestUser51.cert
 /nss-3.52.tar.gz
 /nss-3.53.tar.gz
 /nss-3.54.tar.gz
+/nss-3.55.tar.gz
diff --git a/nss.spec b/nss.spec
index ae44869..63ba146 100644
--- a/nss.spec
+++ b/nss.spec
@@ -1,5 +1,5 @@
 %global nspr_version 4.26.0
-%global nss_version 3.54.0
+%global nss_version 3.55.0
 %global unsupported_tools_directory %{_libdir}/nss/unsupported-tools
 %global saved_files_dir %{_libdir}/nss/saved
 %global dracutlibdir %{_prefix}/lib/dracut
@@ -7,7 +7,7 @@
 %global dracut_conf_dir %{dracutlibdir}/dracut.conf.d
 
 %bcond_without tests
-%bcond_without dbm
+%bcond_with dbm
 
 # Produce .chk files for the final stripped binaries
 #
@@ -44,7 +44,7 @@ rpm.define(string.format("nss_release_tag NSS_%s_RTM",
 Summary:          Network Security Services
 Name:             nss
 Version:          %{nss_version}
-Release:          3%{?dist}
+Release:          1%{?dist}
 License:          MPLv2.0
 URL:              http://www.mozilla.org/projects/security/pki/nss/
 Requires:         nspr >= %{nspr_version}
@@ -887,6 +887,10 @@ update-crypto-policies &> /dev/null || :
 
 
 %changelog
+* Sun Aug  2 2020 Daiki Ueno <dueno@redhat.com> - 3.55.0-1
+- Update to NSS 3.55
+- Disable building DBM backend
+
 * Sat Aug 01 2020 Fedora Release Engineering <releng@fedoraproject.org> - 3.54.0-3
 - Second attempt - Rebuilt for
   https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild
diff --git a/sources b/sources
index a019b76..040d300 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-3.54.tar.gz) = 9b9253469514c085730ae580f6544e882a8264e253687950627a4fa1eeb956287c9da46caf7d8988cd6363f6dee26cb8db755203375751fe53795697d7ae9b7b
+SHA512 (nss-3.55.tar.gz) = acae7b803a3219cd4b78216cb8a6352805741e42eca6a42a5e6289ebbabc6189c7c6bc138cbd8a93d8631d06175c4d34e72957d49fe726adada6aaa2566e399e