diff --git a/.gitignore b/.gitignore
index f5e376a..a334538 100644
--- a/.gitignore
+++ b/.gitignore
@@ -184,3 +184,4 @@ firefox-3.6.4.source.tar.bz2
 /firefox-langpacks-44.0.2-20160211.tar.xz
 /firefox-45.0.source.tar.xz
 /firefox-langpacks-45.0-20160302.tar.xz
+/firefox-langpacks-45.0-20160304.tar.xz
diff --git a/firefox.spec b/firefox.spec
index 28e60c6..e042503 100644
--- a/firefox.spec
+++ b/firefox.spec
@@ -87,7 +87,7 @@
 Summary:        Mozilla Firefox Web browser
 Name:           firefox
 Version:        45.0
-Release:        3%{?pre_tag}%{?dist}
+Release:        4%{?pre_tag}%{?dist}
 URL:            https://www.mozilla.org/projects/firefox/
 License:        MPLv1.1 or GPLv2+ or LGPLv2+
 Group:          Applications/Internet
@@ -790,6 +790,9 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #---------------------------------------------------------------------
 
 %changelog
+* Fri Mar 4 2016 Martin Stransky <stransky@redhat.com> - 45.0-4
+- Update to 45.0 (B2)
+
 * Thu Mar 3 2016 Martin Stransky <stransky@redhat.com> - 45.0-3
 - Added run-time fix for JIT (mozbz#1253216)
 
diff --git a/sources b/sources
index 04f8265..4cd0d3f 100644
--- a/sources
+++ b/sources
@@ -1,2 +1,2 @@
-ebd548f196e604113c30ea3fb4ccc81e  firefox-45.0.source.tar.xz
-40968cf146a8e1be985f9accbfeaacc7  firefox-langpacks-45.0-20160302.tar.xz
+09cbada824841f9e1d77f095e7cd02c1  firefox-45.0.source.tar.xz
+714901cc43ab89d48eb4a29224f80027  firefox-langpacks-45.0-20160304.tar.xz