diff --git a/.gitignore b/.gitignore
index 8e05a87..ef6528b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -47,3 +47,4 @@ TestUser51.cert
 /nss-3.49.2.tar.gz
 /nss-3.50.tar.gz
 /nss-3.51.tar.gz
+/nss-3.51.1.tar.gz
diff --git a/nss.spec b/nss.spec
index 63ac639..e5ac5cc 100644
--- a/nss.spec
+++ b/nss.spec
@@ -1,5 +1,5 @@
 %global nspr_version 4.25.0
-%global nss_version 3.51.0
+%global nss_version 3.51.1
 %global unsupported_tools_directory %{_libdir}/nss/unsupported-tools
 %global saved_files_dir %{_libdir}/nss/saved
 %global dracutlibdir %{_prefix}/lib/dracut
@@ -296,6 +296,8 @@ export NSS_USE_SYSTEM_SQLITE=1
 
 export NSS_ALLOW_SSLKEYLOGFILE=1
 
+export NSS_DISABLE_DBM=1
+
 %ifnarch noarch
 %if 0%{__isa_bits} == 64
 export USE_64=1
@@ -886,6 +888,10 @@ update-crypto-policies &> /dev/null || :
 
 
 %changelog
+* Mon Apr 20 2020 Daiki Ueno <dueno@redhat.com> - 3.51.1-1
+- Update to NSS 3.51.1
+- Disable building DBM backend
+
 * Tue Apr  7 2020 Daiki Ueno <dueno@redhat.com> - 3.51.0-1
 - Update to NSS 3.51
 
diff --git a/sources b/sources
index d0ba033..8464526 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-3.51.tar.gz) = 9c894b1ea41449b000750a7b3a89fcb43dfc3d0d4d6dcc0dc288bc73996f76f1ee1ede927a8aecae6d4a07f9f3d3e3a042c6a60cf06e27e0cdc004fce2e510fd
+SHA512 (nss-3.51.1.tar.gz) = 1878780886cc330489a14a60ee5cb67b174f3167d020db256eacdce079652ef8af65813914cd0fb5684457053fa27acc9bff72d0713fbea28795613ca45a6d46